User Manual
Contents
1. teeta 49 www altechna com 3 Anm ALTECHNA 1 Introduction This manual is designed to help to install and operate Watt Pilot Before installing and operating Watt Pilot please read installation and operation instructions carefully Safety instruction must be read especially careful If there any questions about manual contents please contact info wophotonics com Altechna reserves the right to update contents of the manual without notification 1 1 Watt Pilot short description Motorized Waitt Pilot is a computer controlled laser beam attenuation device It attenuates free space laser beam pulse continuously without introducing additional energy fluctuations Watt Pilot communicates with computer via USB Also it has STEP DIR interface for controlling via other devices 1 2 General safety requirements Motorized Watt Pilot is designed to operate in conjunction with laser system All applicable rules and regulations for safe operation of lasers must be known and applied while installing and operating Watt Pilot The customer is solely responsible for laser safety while using Watt Pilot as standalone or integrated into system The customer must use suitable protective measures While assembling or operating Watt Pilot cannot be stared into direct or scattered laser beam All parts of the body must be kept away from the laser radiation While adjusting laser beam path through Wat2. Flow control Receive Buffer 7 High 14 14 Transmit Buffer High 16 8 COM Port Number Disconnect and reconnect USB cable after changing COM port number Controller and computer are ready to upgrade firmware www altechna com ALTECHNA By default settings COM1 is always reserved by WINDOWS and must not be used by this device To upgrade firmware follow instructions below according to hardware version For controller version 2 1 1 Connect controller to computer 2 Turn off controllers power 3 Press and keep pressed firmware upgrade button located under small hole in front panel as shown in picture before 4 Turn on the power while keeping firmware upgrade button connected Button can be released after 5 seconds after applied power supply step 1 Go to Firmware and tools folder and run AvrProg exe Firmware upgrade window should appear If not restart pc ant start from firmware beginning AVRprog AVRprog Hex file Hex file Firmware v2 1 2011 06 16 hex Firmware v2 1 2011 06 16 hex n Browse 2 5 1 Verify Read Verify Read EEPROM EEPROM 3 59 1 Verify Head Program Verify Head Device Device Advanced Advanced Upgrade utility window before Upgrade utility window after upgrade successful upgrade Step 2 Browse for Firmware v2 1 date hex files in appreciate folder Firmwa
3. ENABLE pins 11 DIR signal sets turn direction of motor OV motor turns counterclockwise 3 3V 5V motor turns clockwise Voltage transitions from to 5 V on STEP input advances motor per one step 5 V on ENABLE input shuts down motor and step input is ignored use this input to reduce motor heating Controller STEP DIR interface input circuit is shown in Figure 18 ATTENTION ENABLE pin must be switched to 0 V then operating in STEP DIR mode and if motor is not to be used In STEP DIR mode a fixed current is applied to the motor all the time and motor can overheat if ENABLE pin is not handled Another solution to overheat is to reduce TTL current in Watt Pilot controller current settings using PC software Feedback about zero position switch state can be read from STEP DIR INTERFACE connector pins ZeroPosE and ZeroPosC These pins are phototransistors emitter pin 12 and collector pin 4 Phototransistor is open low resistance state if zero position switch is pressed and closed resistance between emitter and collector is high if zero position switch is not pressed most of the time Zero position switch is mechanical and located near the attenuators waveplates holder Holder pushes it then turning and pressed state can last up to 5 degrees equal to 150 500 steps with half stepping resolution In USB mode when returning to zero position controller turns
4. 11 Boolean 1 or 0 Current operating mode USB mode if 1 and STEP DIR mode if 0 Integer 0 255 Acceleration value Integer 0 255 Deceleration value Integer 1 65500 Speed value Integer 0 255 Motor motion current value Integer 0 255 Motor idle current value Integer 0 255 Motor current value in STEP DIR mode Integer 1 2 4 8 or 6 Micro stepping resolution value full half quarter eight or sixteen Boolean 1 or 0 Motor enable motor is enabled if 1 and motor is disconnected if 0 next page Sie a e ALTECHNA Boolean 1 or 0 Whether to report coordinate then hitting zero position switch if 1 or do not report if 0 If this option is on 1 controller sends string zp integer position on each zero position button press Boolean 1 or Whether to reset position counter on each zero position switch press or no If this option is disabled 0 zero position button press does nothing to step counter If waveplate holder turned twice command o will show us that position is more than 15600 15600 is full waveplate turn in full stepping mode If this position is enabled 1 position counter will become 0 on each zero position switch press Response example default controller settings USB 1 a2232 d 232 55000 wm 114 ws 36 wt 114 r 2 en 1 zr 0 zs 0 pt Show controller settings related to STEP DIR mode Type this command only when using terminal and manual command entering This is
5. ALTECHNA WATT PILOT Motorized Attenuator USER MANUAL www altechna com 1 ALTECHNA WATT PILOT October 2011 Copyright Altechna R amp D Co Ltd All Rights Reserved No part of this manual including the products and software described in it may be reproduced transmitted transcribed stored in a retrieval system or translated into any language in any form or by any means except documentation kept by the purchaser for backup purpose without the express written permission of Altechna R amp D Ltd ALTECHNA R amp D Product warranty or service will not be extended if 1 The product is repaired modified or altered Unless such repair modification of alteration is authorized in writing by ALTECHNA R amp D OR 2 he serial number of the product is defaced or missing ALTECHNA PROVIDES THIS MANUAL AS IS WITHOUT WARRANTY OF ANY KIND EITHER EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY FOR A PARTICULAR PURPOSE IN NO EVENT SHALL ALTECHNA ITS DIRRECTORS EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT SPECIAL INCIDENTAL OR COSEQUENTIAL DAMAGES INCLUDING DAMAGES FOR LOSS OF PROFITS LOSS OF BUSINESS LOSS OF USE OR DATA INTERPUTION OF BUSINES AND THE LIKE EVEN IF ALTECHNA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM ANY DEFECT OR ERROR IN THIS MANUAL OR PRODUCT SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL A
6. waveplate counterclockwise and seeks when switch is pressed Controller reacts to zero position only in one way which directly improves zero position precision After switch pressed controller slowly turns waveplate until switch is released When working in STEP DIR mode and user needs to return to hardware zero position must use ZeroPosC and ZeroPosE pins in similar Way It is necessary to mention that motor shaft is inert Frequency of STEP signal must be controlled linearly especially at high motor speeds Motor should accelerate and decelerate smoothly For instance control logic must sweep down STEP frequency before changing DIR level Similarly frequency must be swept up then reaching high motor speed All step motor has resonance frequency for watt pilot motor it is from 100 to 300 Hz At some frequency motor starts to vibrate It is natural for motors Vibration can be reduced or eliminated by using micro stepping or avoiding resonance frequency Sie H mr gt ALTECHNA 7 7 STEP DIR INTERFACE connector pin out STEP DIR INTERFACE 15 9 Figure 15 STEP DIR INTERFACE D SUB15 female connector Table 2 STEP DIR INTERFACE connector pin out Type n Below is the description of connectors pins Step A Step K 3 3 V 5 V compatible input to optocouplers anode Step A and cathode Step K Rising edge on Step A pin with reference to Step K advances motor by 1
7. Direct Control 17 D 18 19 FER ride Nero qiio MR RR 22 7 1 Watt Pilot controller 22 7 2 Watt Pilot controller 23 7 3 Connecting stepper motor to Watt Pilot controller 26 7 4 Watt Pilot controller internal block diagram 28 7 5 Controller operation 29 TO o VER 30 7 7 STEP DIR INTERFACE connector pin 31 7 8 Input signal timing 34 NES OG 34 7 10 Watt Pilot controller connection examples and input circuit diagram 35 8 Watt Pilot controller serial command summary 36 8 1 Serial command usage in windows 45 9 Watt Pilot controller dimensions eessssseseeeennnnn 47 10 Watt Pilot dimensions nennen 48 Tis
8. Integer 0 1 2 or 3 Current motor run state 0 motor is stopped 1 accelerating 2 decelerating 3 running at constant speed 2 Integer in range of 2147483646 2147483646 Current motor position Response example 334437 Use this command to determine if motor has done its movement After issuing any move command poll command in time intervals about 250 ms and decode response If 1 parameter become 0 it means that motor has stopped and is ready for next move command X Heport zero position when hitting zero position switch Parameter x 1 Controller sends string zp integer position on each zero position button press Turn off zero position reporting www altechna com ALTECHNA Reset coordinate counter then hitting hardware zero position switch Parameter x 1 Position counter will become O on each zero position switch press 0 Position counter increases position continuously Motor enable in USB mode Parameter x 1 Motor is enabled 0 Motor is disconnected Reset controller Controller resets in 4s after issuing this command It is equivalent to power switch press This command can also enter into firmware upgrade mode if firmware upgrade button is pressed see 5 Firmware upgrade All changed settings and position are restored in previous State if ss and or so commands was not issued before reset Then controller starts it sen
9. Parameter x Integer number in range of 0 255 1 is the lowest acceleration and 255 is the highest O turns off acceleration Turning on acceleration helps to increase position repeatability ALTECHNA d x Set deceleration Parameter x Integer number in range of 0 255 1 is the lowest deceleration and 255 is the highest O turns off deceleration Turning on deceleration helps to increase position repeatability SX Set maximal motor speed Parameter x Integer number in range of 1 65500 Watt Pilot waveplate rotation angular speed can be calculated using such formula _ 14400000 78r 65535 x Here angular waveplate rotation speed degrees per second r micro stepping resolution 1 2 4 8 or 16 Controller advances motor per one step in time intervals equal to T 2 65535 x 8 us controller settings related to USB mode Type this command only when using terminal and manual command entering This is the way to see fundamental settings in eye friendly fashion To get controller settings for software programming use pc command instead This command can be used to ping controller to check if controller is attached to particular COM port If device response to p string begins with pUSB it means that Watt Pilot is attached and is turned on Return string finished with and OxOD symbols USB 1 a 2 d 3 s 4 wm 5 ws 6 wt 7 r 8 en 9 zr 10 zs
10. must save it because modified settings can be lost User can reload default settings from a file see 5 Firmware upgrade ALTECHNA 7 Watt Pilot controller 7 1 Watt Pilot controller specifications Virtual serial port COM port settings then attached to USB Baud Rate 38400 8 data bits 1 stop bit Parity None Flow control None Controller input STEP DIR INTERFACE connector Input pins Description UartRx UART baud rate 38400 8 data bits 1 stop bit no parity RXD and UartTx TXD pins are 5V compatible with reference to GND pin Maximal input voltage 5 5 V otep Dir En These pins are optically isolated 3 3 V 5 V compatible Input current requirement per pin 4 6 mA 2 8V 5 2 mA 3 3V 6 8 mA 5V These logic pins are not optically isolated 5V compatible with UartOn reference to GND Maximal input voltage 45 5 V Motor output A Step frequency Up to 4 kHz Controller has internal overheat protection Open loop operation this means there is no feedback about absolute motor position only internal position counters value can be acquired Sie a ALTECHNA 7 2 Watt Pilot controller connections Watt Pilot front and rear connectors are shown in the pictures below STEP DIR INTERFACE 0000000 Figure 10 USB B connector Firmware upgrade button hidden undersmall hole highlighted by arrow and STEP DIR INTERFA
11. problem 2 When this check box is checked motor power is enabled when not motor power disabled 3 Motor turning parameters speed acceleration and deceleration a Speed motor turning speed varies from 1 65000 1 is slowest 65000 is fastest When user changes this parameter software automatically will show speed in degrees per second Sie s A ALTECHNA b Acceleration how fast motor achieve definite speed Acceleration varies from 0 to 255 When user set it to 0 where is no acceleration 1 is slowest acceleration and 255 15 fastest c Deceleration how fast motor stops Deceleration varies from 0 to 255 0 is no deceleration 1 is slowest deceleration and 255 is fastest Meg Changing these parameters will change device operationality 4 Motor current regulation User can define how much current can flow through motor Watt pilot use motion current 0 95A and stop power 0 30A Watt Pilot uses only these current values When user changes these parameters motor can overheat and damage Watt Pilot permanently RMA are not available when user damages Watt Pilot If Watt Pilot controller is used to drive step motors not for attenuator current values can be changed to meet motor requirements 5 Zero position options This device can report when Waitt Pilot hits zero position and show how many steps were made to turn 360 But where is no possibility in this program to show these zero p
12. step in STEP DIR mode Motion direction depends on Dir signal level Dir A Dir K 3 3 V 5 V compatible input to optocouplers anode Dir A and cathode Dir This input controls motor direction in STEP DIR mode 5 V on Dir A pin with reference to Dir sets motor direction clockwise This input can be disconnected by command parser see command line summary in Table 3 and Figure 14 SW F for details ALTECHNA Enable A Enable K 3 3 V 5 V compatible input to optocouplers anode Enable A and cathode Enable This input can disable controllers output in STEP DIR mode 5 V on Enable A pin with reference to Enable K disables motor no current is applied to the motor This input can be disconnected by command parser see command line summary in Table 3 and Figure 14 SW E for details ZeroPosC ZeroPosE These pins can be used to detect hardware zero position When mechanics is in zero position phototransistor is closed resistance between pins ZeroPosC and ZeroPosE is low Zero position feedback schematic diagram is shown in Figure 16 MOTOR connector D SUB9 Female Watt Pilot 9 Internal 5V f controller STEP DIR INTERFACE connector D SUB15 Female NES LTV817C ZeroPOSC 2 Zero position Switch Users 5 internal logic Userszero position signal U Switch released Switch pressed t Figure 16 Zero position f
13. the way to see settings in eye friendly fashion To get controller settings for software programming use pc command instead Return string finished with and OxOD symbols swEn 1 en 2 swDir 3 dir 4 zr 5 zs 6 cs 7 All returned parameters are boolean 0 or 1 1 Boolean 1 or 0 Status of switch SW E see Figure 14 1 means that Enable pin is disconnected and motor is enabled if 2 parameter is 1 or disabled if 2 is equal to O If 1 is 0 then controller output state is dependent on logic level on Enable input Boolean 1 or 0 Motor enable motor is enabled if 1 and motor is disconnected if O This setting is meaningful if parameter 1 is On Boolean 1 or 0 Status of switch SW F see Figure 14 1 means that Dir pin is disconnected and motor turns clockwise if 4 parameter is 1 or counterclockwise if 4 is equal to If 3 is 0 then motor direction is dependent on logic level on Dir input Boolean 1 or 0 Motor direction motor turns clockwise if 4 parameter is 1 or counterclockwise if 4 is equal to 0 This setting is meaningful if parameter 3 is On Reserved Reserved Reserved Response example default controller settings swEn 0 en 1 swDir O dir 1 2 0 25 0 cs 0 La ALTECHNA pc Show all controller settings separated by semicolon Use this command when programming computer software to read all settings Return string finished with a
14. A 6 3 Settings tab 2 Watt Pilot Controler gt Watt Pilot Calibrate Direct Control Settings Disconnect ar sm Disconnect General Settings STEP DIR mode Settings 1 om Overwrite Enable Input Enabled 12 Half Steps D 011deg Step 31200 cows Motor Enabled 60000 Controller Name Speed 1 DoubleClick to Renam 3 Acceleration 232 Current Position 3500 Deceleration 1232 5 4 E Feron Hava Ze feed sara 4 8 save Satins J 9 Figure 9 Watt Pilot settings tab settings menu options 1 User can select motor resolution It means that step to turn wave plate 360 is variable from 15600 steps to 249600 steps but only by certain values 15600 31200 62400 124800 249600 step per 360 Me Setting bigger resolution will change waveplate angular speed the bigger resolution the slower waveplate turns All step motors has resonance Resonances are a physical effect which depend on many facts All Stepper have this issue Changing the frequency only a small bit most time solve this problem One way which often helps is to change the step mode Setting halfstep mode mostly for 9996 of stem motors corrects resonance
15. CE D SUB15 connectors are located in front e USB is used to control Watt Pilot with computer e Firmware upgrade button must be pressed with needle in order to upgrade firmware see this document 5 Firmware upgrade about firmware upgrade e STEP DIR INTERFACE connector can be used to control Watt Pilot with microcontroller via UART in USB mode or in STEP DIR mode see ALTECHNA e 7 6 STEP DIR mode about STEP DIR mode and STEP DIR INTERFACE connectors pinout Figure 11 Power supply connector power switch and D SUB9 connector for connecting Waitt Pilot motor are located in rear of controller e Controller requires 12VDC 2A power supply e See 7 3 Connecting stepper motor to Watt Pilot controller for details about MOTOR connector Watt Pilot controller can be used to drive most of stepper motors not only from WATT PILOT For example most linear stages are driven by stepper motors so these controllers can be used to control them More about such capability see section 7 3 Connecting stepper motor to Waitt Pilot controller ALTECHNA Waitt Pilot controller wiring scheme is shown in Figure 12 Computer with Watt Pilot Attenuator Watt Pilot Controller or terminal software USB MOTOR USB B socket D SUB9 male Signal generator STEP DIR INTERFACE 120 microcontroller D SUB15 female 2 1mm
16. ECHNA 5 Firmware upgrade Before using Watt Pilot Controller software user must have the latest firmware in controllers There are two versions of controller hardware User always purchase latest firmware version For up to date version check www wophotonics com Version can be distinguished by controller appearance Firmware upgrade button Controller version 2 1 Black plastic front panel For older version controllers contact ALTECHNA R amp D email info wophotonics com Each controller which firmware is going to be updated must be tied to COM2 serial port in windows To change com port of controller go to device manager under section Ports COM amp LPT a ALTECHNA Control Panel Home File Action View Help eimi Device Manager Remote settings ig System protection gt Batteries E Bluetooth gt Computer b p Disk drives gt AK Display adapters b t DVD CD ROM drives 85 Human Interface Devices gt lt q IDE ATA ATAPI controllers b X Imaging devices Keyboards p JI Mice and other pointing devices gt i Monitors b J amp P Network adapters Ports COM amp LPT gt 1 Processors gt 85 System devices Advanced system settings Manage Scan with AVG Map network drive Disconnect network drive Sound video and game cont
17. FF switch is marked in red 13 Figure 5 shows the way to the COM port selection Firstly right click on Computer then Properties Device Manager and Ports COM amp LPT ALTECHNA Control Panel Home File Action View Help 4 A PC gt gt Batteries b Bluetooth p Computer b Disk drives amp Display adapters b ij DVD CD ROM drives 5 Human Interface Devices gt qq IDE ATA ATAPI controllers b Imaging devices Keyboards JI Mice and other pointing devices gt Ai Monitors b amp Network adapters p Ports COM amp LPT gt 8 Processors b JE System devices b amp Sound video and game controllers Wy Device Manager Wy Remote settings L System protection dy Advanced system settings Wi i Scan with AVG Map network drive Disconnect network drive Create shortcut ler lt Storage controllers gt Universal Serial Bus controllers Delete Update ince Information and Properties 2 Figure 5 Finding the USB port by default settings COM 1 is always reserved by WINDOWS and must not be used by this device 14 One port will be called Silicon Labs Remember its number in the brackets Attenuator 15 installed and ready to use 15 Start Watt pilot controller exe See 6 Watt pilot control software ALT
18. RE FURNISHED FOR INFORMATIONAL USE ONLY AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ALTECHNA ALTECHNA ASSUMES NO RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS MANUAL INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT THIS MANUAL IS DIRECTLY CONNECTED TO FIRMWARE VERSION LATEST FIRMWARE AND MANUAL VERSIONS CAN BE DOWNLOADED FROM www wophotonics com Products and corporate names appearing in this manual may or may not be registered trademarks or copyrights of their respective companies and are used only for identification or explanation and to the owner s benefit without intent to infringe www altechna com 2 Anm ALTECHNA Contents Mie OD 4 1 1 Watt Pilot short description 4 1 2 General safety requirements 4 SYD OS m 4 clo 61 Fel 6 e 5 1 3 Operating and storage conditions seen 6 Oper gt crassi a 6 2 1 Watt Pilot main 1 7 SEES gunelomm M 8 4 SOM Ware INSTIGATION 9 E 13 6 Watt pilot control 17 6 1 Calibrate
19. Wizard The installer will guide you through the steps required to install Watt Pilot Controller on your omputer WARNING This computer program is protected by copyright law and intemational treaties Unauthorized duplication or distribution of this program or any portion of it may result in severe civil or criminal penalties and will be prosecuted to the maximum extent possible under the law 4 Click next www altechna com 9 nm ALTECHNA Watt Pilot Controller Select Installation Folder NN E Progam FiestAtechnatwat Pit 5 Press Next to start installation USB drivers are installed updated automatically if needed Watt Pilot Controller 6 Click next Watt Pilot Controller Installing Watt Pilot Controller 7 Wait to finish MEM oM ALTECHNA ie Watt Pilot Controller Installation Complete Watt Pilot Controller has been successfully installed Click Close to exit Please use Windows Update to check for any critical updates to the Framework 8 Press Close to exit installer Watt Pilot Controller icons should appear on desktop and start menu 9 Plug in DB 9 Watt Pilot motor connector 10 Connect Waitt Pilot controller with PC via USB cable 11 Connect 12V adapter power source to Watt Pilot controller 12 Turn on device by switching to ON position Green LED indicates that device 15 turned on Figure 4 Figure 4 ON O
20. als if working in USB mode EE SAEVUS ALTECHNA 7 5 Controller operation modes Watt Pilot controller is able to operate in two modes e USB mode o In USB mode motor is turned by computer software Controller is attached to computer via USB cable e STEP DIR mode In STEP DIR mode motor is turned by external 3 3V 5V signals applied to front STEP DIR INTERFACE connector on controller Controller can be attached to non typical devices for example signal generators microcontrollers MOIS There are 5V UART protocol pins in STEP DIR INTERFACE connector UART is alternative to USB connection with computer and can be used to attach Watt Pilot controller to microcontroller which has UART support so computer can be replaced by microcontroller Operation mode can be selected by interconnecting 13 GND and 5 ModeSel pins in STEP DIR INTERFACE D SUB15 female connector If 13 and 5 pins are interconnected controller works in STEP DIR mode If 13 and 5 pins are not connected controller works in USB mode EE ALTECHNA 7 6 STEP DIR mode Controller works in STEP DIR mode if 13 GND and 5 ModeSel pins are interconnected in D SUB15 female connector shown in Figure 15 In this mode USB connection and computer is not necessary Watt Pilot is controlled by 5V level signals applied to STEP DIR INTERFACE connector These signals are called STEP pins 1 9 DIR pins 2 10 and
21. ds string STEP DIR mode or USB mode according to state of pin ModeSel Turn off acceleration Turn off deceleration Save settings of controller save configuration mentioned in pc command description JJ to controller memory Configuration saved by command will be restored on controller power on SS Save current position Save current position to controller memory Position saved by so command will be restored on controller power on Write 20 character long name to controller Parameter x 20 characters If x is not 20 symbols then returned name can consist of unreadable characters Please space pad trailing name Show name Returns 20 character string saved by sn command Return 20 character string www altechna com ALTECHNA 8 1 Serial command usage in windows In order to use commands described in Table 3 user must fallow the steps below 1 Then controller is attached to computer a new serial port port appears in the system Figure 20 shows the way to the COM port selection Firstly right click on Computer then Properties Device Manager Under Ports COM amp LPT look for port named Silicon Labs Remember its number Control Panel Home File Action View Help lt Wy Device Manager Remote settings System protection me PC Advanced
22. e powerful stepper motor and performed well but better for consumers to contact ALTECHNA R amp D for more info Controller was tested with step motor at 2 4V and 2 8A per phase ALTECHNA 7 4 Watt Pilot controller internal block diagram Zero position switch mi Motor Motor Feedback from zero position switch SWA USB Set motor connector Command power Motor parser driver Gp umm 17 7 GETTE Enable H560 0 H gt E 5 HE 186001 T 5 H5600 H gt 5 Es 9 Hol prie 60959 S Step K Q o 8 Ne nH Internal 5V InternalGND 1 Figure 14 Block diagram of Watt Pilot controller Watt Pilot controller consists of 1 Motor driver a This block drives motor directly according to otep Dir Enable Motor power signals 2 Command parser a This block parses commands acquired from USB or UART depending on switch A state SWA The state of switch A can be changed by logic level on input UartOn in STEP DIR INTERFACE connector This block can select which Enable Dir signals to use STEP DIR mode internally generated or picked up from STEP DIR INTERFACE connector pins Switch E and F are used for this purpose 3 Internal Step Dir signal generator a This block generates acceleration steady speed and deceleration step pulses dir and enable sign
23. eedback diagram 5 V output means that zero position switch is released in this example Because of mechanical zero position switch zero position optocouplers signal should be debounced or used only first voltage spike detected for accurate zero position detection ModeSel Then this pin is connected to GND pin 13 controller switches into STEP DIR mode If this pin is left unconnected or applied 5 V with reference to controllers ground pin 13 Step Dir Enable inputs become disconnected and controller works in USB mode ModeSel pin controls internal switches SW B SW C SW D See Figure 14 for details ModeSel pin is not optically isolated and is pulled up to internal 5 V See Figure 19 EE ALTECHNA UartOn This pin controls internal switch SW A which sets command path to the command parser see Figure 14 Then this pin is connected to GND pin 13 controller can be controlled by 5V UART interface via UartRx and UartTx pins in STEP DIR INTERFACE connector instead of USB port Useful if controller is operated by user s microcontroller FPGA All USB mode commands are valid If this pin is left unconnected or applied 5 V with reference to controllers ground pin 13 command parser gets commands via USB port UartOn pin is not optically isolated and is pulled up to internal 5 V see Figure 19 UartRx UartTx 5 V UART input and output Pins can be used to control controller by external m
24. erference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures HReorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help ALTECHNA R amp D is not responsible for any radio television interference caused by modifications of this equipment or the substitution or attachment of connecting cables and equipment other than those specified by ALTECHNA R amp D The correction of interference caused by such unauthorized modification Substitution or attachment will be the responsibility of the user ATTENTION Cellular phones or other radio transmitters are not to be used within the range of three meters of this unit since the electromagnetic field intensity may then exceed the maximum allowed disturbance values according to IEC 61326 1 www altechna com 9 nm ALTECHNA 1 3 Operating and storage conditions ATTENTION For proper Watt Pilot functioning please use assigned controller found in the same package Using unassigned controller might be harmful to the device Environmental conditions that must be hold while storing servicing and operating are Storage tempera
25. et motor direction counterclockwise Now send ss to save this setting to controller m x Move motor by x steps Parameter x Integer number Can be positive motor turns clockwise and negative motor turns counterclockwise Place for negative notation x in range of 2 147 483 646 2 147 483 646 Example m 1000 to move 1000 steps clockwise and m 1000 to move 1000 steps counterclockwise www altechna com ALTECHNA Go to absolute coordinate Parameter x Integer number Can be positive and negative Place for negative notation x can be in range of 2 147 483 646 2 147 483 646 Example g 400 motor turns while internal step counter reaches 400 Then send m 1000 to move 1000 steps clockwise Now motor stands in 600 position X Set coordinate counter to specific value Parameter x Integer number Can be positive and negative Place for negative notation x can be in range of 2 147 483 646 2 147 483 646 Example 625 set coordinate to 625 Now send so to save position to controller Resets coordinate counter to 0 Stop motor smoothly if it is currently running This is preferred command to stop motor instead of b Break movement immediately This command stops motor but step counter accuracy can degrade using watt pilot Go to hardware zero position and reset step counter Use this command to return waveplate
26. higher Watt Pilot output polarization contrast www altechna com 6 nm ALTECHNA 2 1 Watt Pilot main components Optical components are placed into mechanical holders Main mechanical components of motorized Waitt Pilot are shown in Figure 2 Waveplate mount is designed to 1 inch diameter waveplate 4 2 Adapter for polarizers Waveplate mount n stepper motor Figure 2 Watt Pilot main components Wave plate mount is attached to micro step motor Waveplate inside the waveplate holder is rotating around the optical axis of incident laser beam Micro step motor and waveplate mount are shipped together in one piece if there is no other request Brewster type thin film polarizers are placed into adapter for polarizers Polarizers to the mount are fixed using 6 plastic bolts 3 for each polarizer Adapter for polarizers and waveplate mount are fixed while using M4 screw with vinyl cap Watt Pilot might be fixed to an optical table using posts and clamps or to the custom system while using M6 or M4 screw on the bottom and M4 screw on the side see 10 Watt Pilot dimensions www altechna com 7 Anm ALTECHNA 3 Assembling Figure 3 Assembling the Watt Pilot 1915 Powder free gloves must be worn while mounting optical components Avoid touching and scratching optical surfaces STEP 1 Place polarizers into mechanical adapter Polarizers must face each other with surfaces coated with polarizing coa
27. icrocontroller if pins UartOn and GND are interconnected These pins are not optically isolated If optoisolation is needed special integrated circuits can be used for example ADUM1201 GND Ground pin of controller internal circuit It is reference for ModeSel UartOn UartRx and UartTx pins 5V Internal controllers 5V Can be used to drive optocouplers if implementing optoisolated uart or external circuitry Max 25 mA output ALTECHNA 7 8 Input signal timing requirements STEP Symbo Time Duration ta i to Delay to enter STEP DIR mode after ModeSel low 2 2 30 ms 7 9 USB mode Controller operates in USB mode when pin 5 and pin 13 are not connected In this mode Watt Pilot is controlled by commands acquired from USB or UART and Step Dir Enable inputs are disconnected in this mode Watt Pilot Controller software should be used for attenuation control see 6 2 Watt Pilot tab Then controller is attached to computer a new serial port port appears in the system All commands are passed through this serial port so user can control Watt Pilot by opening this port with any kind of terminal program for example Hyper terminal which is preinstalled in windows XP and manually entering required commands see 8 1 Serial command usage in windows Or third option to communicate with controller is to write software which automatically sends commands by using virt
28. k to calibrate Watt Pilot 6 1 Calibrate Direct Control tab a Watt Pilot Controler Pilot Calibrate Direct Control Settings Move To Hardware era Position 2 COM26 Calibrate D T Dive waveplate to the position with minimum attenuation x 6 Step Press the button below if set to minimum attenuation This ls Minimal 4thenuation 7 Use the following measurement units for attenuation optional Step 3 Enter measured real energy range that Watt Pilot can achieve Minimal Energy Maximal Energy 1 x 8 1 Figure 7 Calibrate Direct Control tab Calibrate Direct Control menu options 1 Connection menu when program starts it automatically scans for plugged in COM ports Select your Watt pilot COM port and press Connect By user decision watt pilot can be named Double click on text DoubleClick to Renam max 20 characters spaces counts in Also this menu shows current position by steps Connection menu will be shown on all other menu Once pressed it will move Watt pilot to zero position Show current angular position When check box is checked it unlocks direct control buttons User may move waveplate by his decision to find minimal attenuation position Stop button stop motor and waveplate stops rotating Show current position by steps Press this button when you find minimal attenuation Controller will be calibra
29. nd OxOD symbols 1 512 5 3 4 5 6 7 8 9 10 1 1 12 13 1 4 15 16 17 18 19 20 21 22 23 24 Character meaning 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Boolean 1 or 0 Current operating mode USB mode if 1 and STEP DIR mode if 0 Integer 0 1 2 or 3 Current motor run state 0 motor is stopped 1 accelerating 2 decelerating 3 running at constant speed Integer 0 255 Acceleration value Integer 0 255 Deceleration value Integer 1 65500 Speed value Integer 0 255 Motor motion current value 0 00835x A Integer 0 255 Motor idle current value 0 00835x A Integer 0 255 Motor current value in STEP DIR mode 0 00835 A Integer 1 2 4 8 or 6 Micro stepping resolution value full half quarter eight or sixteen Boolean 1 or 0 Motor enable motor is enabled if 1 and motor is disconnected if 0 Reserved Boolean 1 or 0 Whether to reset position counter on each zero position switch press or no If this option is disabled 0 zero position button press does nothing to step counter If waveplate holder turned twice command will show us that position is more than 15600 15600 is full waveplate turn in full stepping mode If this position is enabled 1 position counter will become 0 on each zero position switch press Boolean 1 or 0 Whether to report c
30. of pin ModeSel This includes and software restart using j command This string is sent on mode change also if ModeSel pin is pulled low Secondly controller can report that zero position switch was pressed if such option is enabled by zr 1 command Zero position report string mask 1 zp there x is integer number followed by and OxOD symbols So if there is no need for zero position reporting all command responses can be handled by ReadLine function in most of programming languages ALTECHNA Table 3 Command line summary Comman m ent x This command is effective only in STEP DIR mode Controls software disconnecting of Enable input pin switch oW E see Figure 14 Parameter x 1 Enable pin is disconnected motor is enabled 0 Enable pin is disconnected motor is disabled off motor power is controlled by signals on Enable input pin in DB 15 connector Example ent off motor power is controlled by input pin Now send ss to save this setting to controller dir x This command is effective only in STEP DIR mode Controls software disconnecting of Dir input pin switch SW F see Figure 14 Parameter x cw Dir pin is disconnected motor direction is clockwise Di is disconnected motor direction is counterclockwise off motor direction is controlled by signals on Dir input pin in DB 15 connector Example dir ccw s
31. oordinate then hitting zero position switch if 1 or do not report if 0 If this option is on 1 controller sends string zp integer position on each zero position button press Reserved Reserved Reserved Boolean 1 or 0 Motor direction setting in STEP DIR mode motor turns clockwise if 17 parameter is 1 or counterclockwise if 17 is equal to 0 This setting is meaningful if parameter 20 is On Boolean 1 or 0 Motor enable setting in STEP DIR mode motor is enabled if 1 and motor is disconnected if 0 This setting is meaningful if parameter 1 is On next page ie enmmy a ALTECHNA Reserved Boolean 1 or 0 Status of switch SW F see Figure 14 1 means that Dir pin is disconnected and motor turns clockwise if 17 parameter is 1 or counterclockwise if 17 is equal to O If 20 is 0 then motor direction is dependent on logic level on Dir input Boolean 1 or Status of switch SW E see Figure 14 1 means that Enable pin is disconnected and motor is enabled if 18 parameter is 1 or disabled if 18 is equal to 0 If 21 is O then controller output state is dependent on logic level on Enable input 22 Reserved 23 Reserved 24 Reserved Response example default controller settings 1 0 232 232 55000 114 36 114 2 1 1 0 0 0 1 0 1 1 1 0 0 0 0 1 Return running state of the motor and current position Return string finished with OxOA and OxOD symbols 1 2 1
32. osition values It is created for users which develop their own programs or control device by terminal When checked a Report Hardware zero position device show how many steps were made when hitting zero position b Reset zero position if in zero position device start counting step from O reset value default these options are disabled Sie SC ALTECHNA 6 STEP DIR mode settings a Overwrite enable input When it is checked controller ignores STEP DIR D SUB15 connectors 3 pin see 7 7 STEP DIR INTERFACE connector pin out logic level User can choose to enable disable motor in STEP DIR operating mode b Overwrite DIR input When checked controller ignores STEP DIR D SUB15 connectors 2 pin see 7 7 STEP DIR INTERFACE connector pin out logic level User can choose in which direction motor turns when operating in STEP DIR mode Meus By default this settings is turned off 7 STEP DIR current When in STEP DIR mode user can select current value 8 Read settings Program reads settings from device 9 Save settings When user set desired values it is saved in program but only for time when device is turned on When device is turned off it automatically changes values to last saved By clicking this button user saves all setting in device and they do not change if device is turned off When user made some modifications in settings and it gives desired effect user
33. re and tools Firmware v2 1 date V according to controller version and open it ALTECHNA Step 3 Press Program button under flash section to upgrade firmware Progress bar should move and OK should be displayed after Verifying if upgrade was successful otep 4 To Restore controller to default settings browse for Settings v2 1 date hex or Settings v2 0 date hex file in according folder by version Press Program button under EEPROM section Default settings are shown in the picture below ES Watt Pilot Controler ilot Cali i I Settings Watt Piot Calibrete Direct J General Settings STEP DIR mode Settings Fiesolutian _ Overwrite Enable Input v Motor Enabled Overwrite Dir Input Controller Name 55000 5 speed men J 1 65000 SEPAR DoubleClick to Renam Acceleration 232 0 255 Current Position 2433 11 Deceleration 232 0 255 Motion Curren 0 95 StandBy Current 0 20 Report Hardware Zero Position p mmm Reset Position if in Zero Position Figure 6 Default settings for v2 1 controller otep 5 Close firmware upgrade utility and restart controller Watt Pilot is ready to use ALTECHNA 6 Wait pilot control software This chapter will guide you through control software functions and settings When starting device for the first time it will automatically as
34. rollers Create shortcut Laer lt gt Storage controllers 5 gt Universal Serial Bus controllers Delete Update M Rename nce Information and Properties 2 Double click on Silicon Labs port name press Port Settings tab and click Advanced Choose COM Port Number and select COM2 Then click ok on all of this windows Ej File Action View Window _ mug Computer Management Local 123 4 System Tools E 0 serial port emulators 5 Event Viewer Computer mg Shared Folders Custom USB Devices 8 Local Users and Groups i Disk drives Performance Logs and Alerts E Display adapters 2394 Device Manager DVD CD ROM drives Storage Human Interface Devices Removable Storage H e IDE ATA ATAPI controllers Diskeeper H S Jungo Disk Management gt Keyboards a Services and Applications amp i Mice and other pointing devices zm Monitors f B 88 Network adap COM gt E Ports COM amp COM3 General Port Settings Driver Details Power Management EE oY Printer 5 n use silicon Lab COME fin use inr Bridge coz 1 Bits per second Mf Processors use Data bits Parity 14 use Stop bits COM15 use
35. s V Bn RequesUResponse 0058 1 32232 da232 5255000 wms114 weeds wtw114 2 1 27 0 28 0 32 00100000 la 01100101 01101110 Response from controller 00111010 29 00110001 00100000 01111010 gt 11 901110010 00111010 Transmit CLEAR SendFde 0 a GATA GATS Macias Set Macros M1 3 4 M5 M7 M13 Ur M1 M13 M20 8 Enter commands here Connected Rx 68 Tx 2 Rx OK Figure 21 Terminal exe control window j eo 3 Choose Silicon Labs port number mentioned in step 1 Baud Rate 38400 9 Data bits 8 9 Stop bits 1 e Handshaking none Then click Connect Enter symbol p in lower 4 application pane and press Enter Response from driver should in middle pane of Terminal exe Please see Figure 21 ALTECHNA 9 Watt Pilot controller dimensions 163 mm Figure 22 Watt Pilot controller dimensions of Watt Pilot 1 H ott i p 4 Figure 23 Mechanical dimensions 10 Watt Pilot dimensions ALTECHNA www altechna com ALTECHNA 11 Revision history ay
36. sition 560 ZeroPosC 4 gt gt E Weak pull ups in 5 RT i 710 Q Tx output Uart 17 Output turn UART UartOn 6 c 5 Out EBEN Internal circuitry put turn ModeSel 5 Step Dir mode if needed DDR 9 Q Output 7 9 Enable A c 8 7 2 S 2 Maybe timer driven Output Step A 1119 NC 18 Enable K g 2 gt Step K 9 P ZeroPosE 12 Watt Pilot controller Figure 19 Connecting Watt Pilot controller to microcontroller employing all of Watt pilot features Such connection is not optically isolated pins 13 and 15 can be used as power supply for external circuitry optocouplers for instance 8 Watt Pilot controller serial command summary Each command is executed after pressing ENTER key or sending byte OxOD in hexadecimal carriage return Controller echoes back each symbol received except for OxOD Note that there is no need to send New line symbol because it is treated as ordinary symbol Command parameters are separated with Space 0x20 symbol Usually controller does not send any data to computer only responses for commands are sent There are two cases where controller can send data unexpectedly Firstly each time controller starts it sends string finished with and OxOD symbols STEP DIR mode or USB mode according to state
37. socket custom electronics 12VDC power supply Figure 12 Wiring diagram of Watt Pilot controller Computer microcontroller or both can be used with it ie I n ALTECHNA 7 3 Connecting stepper motor to Watt Pilot controller There are two types of stepper motors unipolar with six wires and bipolar with 4 wires Controller is designed to drive bipolar stepper motors To connect unipolar motor common wires from both windings should be left unconnected A AV BV wires should be connected to Motor connector as described in Figure 13 Motor wire Controller pin Unipolar st t Bipolar st t nipOlar stepper motor IpOlar Stepper motor number 4 Com Yellow Com White 2 Ze L 2 BRed 4 Com White B Blue Figure 13 Connecting unipolar stepper motor to Watt Pilot controller Resistance of motor windings usually is less than 10 Ohms so connecting cable wires must be as short as possible and with significant wire diameter gt 0 75 mm Small resistance of wires reduce noise and power loss Table 1 Watt Pilot controller MOTOR connector pin out DB 9 Female No connection L No connection Zero position switch return see Figure 16 No connection 9 Zero position switch 5V see Figure 16 __ EE A US ALTECHNA MOTOR Watt pilot drivers were tested with other mor
38. system settings 3 luetoot gt Computer gt esq Disk drives gt A Display adapters eff DVD CD ROM drives 013 Human Interface Devices gt lt IDE ATA ATAPI controllers X Imaging devices Open lt 2 Keyboards p JA Mice and other pointing devices eue gt i Monitors i ME Scan with AVG cosa 4 T Map network drive gt T Ports COM amp LPT p Processors Disconnect network drive 4M System devices b amp Sound video and game controllers Create shortcut Laer lt gt Storage controllers gt Universal Serial Bus controllers Rename nce Information and Properties 2 Figure 20 Finding the Watt Pilot controller virtual serial port Meg COM is always reserved by WINDOWS by default and must not be used by this device 2 Run Hyperlerminal or alternative software for instance more advanced terminal can be downloaded from here https sites google com site terminalbpp EEUU Y ALTECHNA rae Wai Disconnect um PIENE Qut Settings d rate 600 14400 _ 97600 C SCT S4XDN XDFF RTSonTX setom AutoDis Connect Time Streamlog custom BA Cleary ASCII table _ Scripting ccs Gio AutoStart Script CRLF I StayonTop 980 27 Graph Remote E3osR Recerve CLEAR ResetCounter Counter 0 c ME He
39. t Pilot laser power must be low as possible The risk of hazardous laser radiation can increase while optical components or instruments are used in combination with Waitt Pilot Appropriate eye protection must be worn all times Electrical safety requirements must be complied while assembling and operating Watt Pilot Symbols WARNING sections marked with this symbol explain dangers that might result in personal injury or death Always read the associated information carefully before performing the indicated procedure ATTENTION Paragraphs preceded by this symbol explain hazards that could damage the instrument and the connected equipment or may cause loss of data NOTE This manual also contains NOTES and HINTS written in this form www altechna com 4 nm ALTECHNA Regulation ATTENTION The following statement applies to the products covered in this manual unless otherwise specified herein The statement for other products will appear in the accompanying documentation These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful int
40. ted by this position Bou RD ed EEUU OU ALTECHNA 8 When check box is checked it unlocks attenuation parameters User can enter real measured lowest peak attenuation parameters program will calibrate attenuation settings by this setting Also user can define measurement units percent by peak and lowest energy by mili Joules or by mili Watts 6 2 Watt Pilot tab ol Watt Pi lo t Co ntroler Watt Pilot Calibrate Direct Control Settings Disconnect Rescan EOM Enter required energy and press Set Energy Controller Mame DoubleClick ta Henam Current Position 3900 Resume Attenuator turn on matter Leave Attenuator turn off mattor 5 Figure 8 Watt Pilot tab Watt Pilot menu options 1 User can enter direct value of energy mJ or mW 2 Other possibility for setting energy value can be done by sliding bar 3 When user set energy by direct value or sliding bar user must press set Energy button to move waveplate 4 Stop button stop motor and waveplate stops rotating 5 For user decision motor can be turned off on It will cut power for motor When motor is turned off it will not move So user can not set energy or calibrate User must turn on motor before moving it Also reduce amount of heat generated from step motor it servers as longer lifetime of device Sie ALTECHN
41. ting Polarizing coating is marked with an arrow so you have to put the polarizers with the arrows on the sides facing each other Then fix polarizers with the plastic bolts use all 3 plastic bolts to fix one polarizer do not tighten up the bolts too much since it can bend the polarizer and thus distort the laser beam STEP 2 Put wave plate into attenuator between two mounting rings as shown Be sure the wave plate is immobilized tightly www altechna com 8 nm ALTECHNA STEP 3 Attenuator consists of two mechanical parts You should assemble both mechanical parts together STEP 4 Use fixing screw for tightening both parts together 4 Software installation Watt Pilot Controller software is compatible ONLY with LATEST controller s firmware User MUST UPGRADE firmware right after installing Watt Pilot Controller software for Watt pilot purchased before 2011 06 29 after this date all Watt pilots are compatible with control software keeping up to date will improve operationality To set up Watt Pilot 1 Disconnect any Watt Pilot Controllers from computer 2 Browse to Watt Pilot Installer folder and run setup exe user get USB flash stick with all necessary files or user can download all files from www wophotonics com 3 Setup window should appear press Next to continue select installation directory and press next Watt Pilot Controller Welcome to the Watt Pilot Controller Setup
42. to its home position determined by zero position switch Then motor stops controller stores 0 in coordinate counter and saves this value ALTECHNA www altechna com Set motor micro stepping resolution Parameter x Motor is driven in full steps mode Waveplate holder turns once in 15600 steps Half step mode Waveplate holder turns once in 31200 steps Quarter step mode Waveplate holder turns once in 62400 steps Eight step mode Waveplate holder turns once in 124800 steps Sixteen step mode Waveplate holder turns once in 249600 steps Higher micro stepping levels demonstrate better position accuracy and no motor resonance It is advisable to use half stepping operation mode Set motor current then it is idles This removes motor heat Some amount of current must be left in order to keep position accuracy Parameter x Integer number in range of 0 255 Motor current can be calculated using such equation 2 0 00835x A Set motor current then it moves Parameter x Integer number in range of 0 255 Motor current can be calculated using such equation 2 0 00835x A oet motor current then controller operate in STEP DIR mode There is no automatic current control like stand by current in USB mode Current can be cut only by logic high on Enable input Parameter x Integer number in range of 0 255 Motor current can be calculated using such equation 2 0 00835x A Set acceleration
43. ture should be between 35 and 60 C Operating temperature is 25 10 C Watt Pilot must be protected from humidity dust and corrosive vapors to avoid damaging optical components and electronics Avoid strong static electricity and electromagnetic fields 2 Operation principle Brewster type Reflected s polarization laser beam Rotating 2 waveplate thin film polarizers Incident laser beam Transmitted p polarization laser beam Figure 1 Watt Pilot operation principle Color differences shows intensity of laser beam Brighter red means more intensive laser beam The motorized Watt Pilot incorporates 2 high performance Brewster type thin film polarizers which reflect s polarized light while transmitting p polarized light Rotating phase retardation of A 2 wave plate is placed in the incident polarized laser beam The intensity ratio of those two beams may be continuously varied without alteration of other beam parameters by rotating the wave plate The intensity of either exit beam or their intensity ratio can be controlled over vide dynamic range P polarization could be selected for maximum transmission or high purity s polarization could be reflected when maximum attenuation of the transmitted beam takes place Proper functioning of Watt Pilot requires optimal configuration of optical elements regarding to incident laser beam polarization contrast Higher incident laser beam polarization contrast leads to
44. ual serial port All Watt Pilot controller commands are described in section 8 Watt Pilot controller serial command summary ALTECHNA 7 10 Watt Pilot controller connection examples and input circuit diagram Wiring if outputs can supply enough current to drive LED s 5 7 mA per output Connect pins 5 and 13 to Controller internal circuitry 13 ModeSel Enable 11 Dir A 2 10 pues 2 4 Ground E 5 5 digital Inputs outputs Output 1 En ee te Custom Electronics board Output 2 Dir Output 3 Step ee ae Input 1 Zero pos Connection for low current outputs lt 5 mA N channel mosfets can be used to amplify output current ModeSel 5 5V digital ModeSel 5 Inputs outputs Custom 11 Electronics Output 2 Dir 2 Drk 10 teoa 1 board Output 3 Step Input 1 Zero pos B Step K 9 losen _ _ am Ground Figure 18 Connecting external equipment to use Watt Pilot controller in STEP DIR mode Such connections are optically isolated Most microcontrollers can drive optocouplers directly so upper wiring is preferred Step Dir connector ALTECHNA 7 7 0 menm ecce a a a a a RUE em em m m em 5V internal 15 Pull Up for zero po
Download Pdf Manuals
Related Search