LV8726TAGEVK Evaluation Kit User Guide
Contents
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3. Figure 10 Windows Security 11 When the installation is successful the final window is shown And the recognized M DrAGON I O Controller port with the port number is shown in the Device Manager File Action View Help es miBE Hs Sd IS 4 y ON Semiconductor SANYO M DrAGON ei M DrAGON 1 0 Controller COM3 Ae Other devices Ports COM amp LPT Print queues B Processors Software devices N Sound video and game controllers Windows has successfully updated your driver software Windows has finished installing the driver software for this device M DrAGON LO Controller gt Storage controllers b b P b b b gt p bb System devices Figure 11 USB Miconl O Controller 2 Figure 12 Device Manager 2 06 17 15 10 www onsemi com LV8726TAGEVK User Guide 12 Start M DrAGON version1130 exe Select Stepper in Motor type Since the Driver type is displayed device that can drive the stepper motor by selecting Stepper select LV8726 Stepper from the drop down list of Driver type and then click OK When the user starts M DrAGON version1130 exe the LED Red on the board turns on This is no problem When the user selects LV8726 Stepper from the drop down list of Driver type the LED turns off If the daughter board is not plugged USB Disconnected is shown b ez u M DrAGON USB Connected File Help Motor Driver Stepper 2
4. 0 837 A Heset Normal Output Enable Un Direction Start Clock Frequency L Top Clock Frequency L start Top Time sec Attenuate 100 Excitation Mode 1 2step T DECAY Mode 259eFAST Blanking Time Step Det Time Chopping Period Over cur Protection ON Auto EMO Output Over cur det Through Cur Protector 0 5us 4 send Serial Signal start stop Re Top Time NON Record Graph Data Polling Timer Figure 30 Setting parameters in the GUI otep 6 Click Enable button The indicator changed to Disable Step 7 Click Send button e Click Send button everytime a parameter is changed in the control window step 8 Click Start button and then the motor begin to rotate The indicator changed to Stop Step 9 Click Stop button and then the motor stop The indicator changed to Start Step 10 Click Disable button The indicator changed to Enable 06 17 15 22 www onsemi com LV8726TAGEVK User Guide APPENDIX A Electrical Operation Check Reference LV8726TAGEVK vO 1 Connect the LV8726TAGEVK to the PC using the USB cable 2 Connect the motor to J2 J3 and power supply to J1 VM LJU UU DU OOO D ari TH VELLE e E ag e mE Tie A hz EST pann a bet NC z Kee j or Aem L z E F F E726 A VE YU E SLE L a Li z Li ei TTE E T e 21 PIT T CTA TER LE VERF BO 1 Lm LIE EN NL EN NE G 318 a1 E WETT ld L H
5. LV8726 Stepper lt Figure 13 Motor type and Driver setting window 06 17 15 11 www onsemi com LV8726TAGEVK User Guide 13 The following windows appear e Controller Figure 14 e Tachometer Figure 15 e Graph Figure 16 LV8726 Stepper Controller USB Connected File Help Chip Enable Disable REF Voltage RF Resistance lout Reset Output Enable Direction Start Clock Frequency L Top Clock Frequency L Start Top Time Attenuate 5 4 Excitation Mode i DECAY Mode Blanking Time T Step Det Time Chopping Period Over cur Protection EMO Output Through Cur Protector Send Serial Signal aa Start Stop Re Top Time Record Graph Data Folling Timer Figure 14 Controller window Figure 15 Tachometer window 2000 1800 1600 1400 1200 4 1000 800 600 400 200 0 5000 4500 4000 3500 3000 2500 2000 1500 1000 500 Elapsed Time msec Motor Rotational Speed pps Figure 16 Graph window 06 17 15 12 www onsemi com LV8726TAGEVK User Guide Usage of the GUI LV8726 Stepper Controller USB Connected File Help Chip Enable Disable REF Voltage L RF Resistance lout Figure 20 GUI field description of controller window 1 1 Chip Enable Disable Enable IC will be enabled state The indicator changed to Disable Disable IC will be disabled state The indicator changed to Enable
6. e Monitor EMO and STEP terminal voltages using CH1 and CH2 of the scope Monitor OUT1 and OUTS output current waveforms using CH3 and CHA CH4 5ms div ox 1 0V div Figure 34 Waveforms for Stepper Motor 10 Click Stop button and then the motor stop The indicator changed to Start 11 Click Disable button The indicator changed to Enable 06 17 15 25 www onsemi com LV8726TAGEVK User Guide APPENDIX B SCHEMATIC LV8726TAGEVK vO WA E A001 MLO A001 npo zs J ano MZ zc 0L Mz ZZO 2019 goly VOLH e bat Q z938 T9ra4b1 CH Q m e E OWS MvO OOL e Oo J oas Oe aay owl ELNO l MVO NZ KLN er mio i001 5 339 C N4 L us ONE Zon diio MZ Zz0 WE zeg E 19 aeuz gey vay 5 an T Ouse C d31S uss MIO 001 a L Joes C1 VIVOS wivaS 30 C 19S Escapa L V192 8 1 vos 8 1S 81S is LINO Z aaya L CT EECH 19S AOOT NOOT Y LYOS isy is ud d3lS I V NO ZV NO HN WWW Onsemi com 26 06 17 15 LV8726TAGEVK User Guide APPENDIX C BILL OF MATERIAL LV8726TAGEVK vO S9A S9A oi MPOLVCZHS88LWHO VIVAN m ee giuiu y aqesgsn SIN N3WVIX Sai T yAnoeuuoo JL S9A CC VEBCBE AyAg2euuoo 3 TA arona ATNVIS onson ow dii ee P 9N sa oHo3sa rernpuootues NO zd2W LL RUE SINN LE aeo asn pueoq a2ejiaju pJEog JajuBneg J84206 ajeway 84206 ajeway gt
7. ED 06 17 15 6 www onsemi com LV8726TAGEVK User Guide R9A B C R10A B C RF Resistor The output current is determined by the RF Resistor and the REF voltage based on the following equation E ar i x ATT ratio RF1 2 Lour Where laur Motor current Veer REF voltage 5 he constant value in LV8726TA Hari RF1 2 Resistor Default setting value is 0 110 AI T patio Attenuate ratio The 0 110 resistor is installed to Rar and Rare individually On this EVB the 0 110 resistor is made up of the parallel connection of the 0 22 Q resistor Vrer is an external voltage source which is driven by the daughter board and its voltage level can be set by GUI ATTratio is set by the register with GUI The GUI operation will be described below n E Mix d ra ET E lagos C Ki Ne GB3 Te L PGND Tm im X VREG 1 d RW dN er Figure 7 RF1 2 Resistor 06 17 15 7 www onsemi com LV8726TAGEVK User Guide 4 Graphical User Interface GUI Installation An easy to use GUI is provided free of cost for real time LV8726TA based solution development Perform the following steps to get started with the GUI This GUI will work with the Windows 32bit 64bit and Windows 8 32bit 1 Unpack the zip file M DrAGON_version1130 zip and confirm files as shown in below M DrAGON version1130 exe M DrAGON driver inf and LV8726TAGEVK v0 Evaluation Kit User Guide pdf 2 Connect the LV8726TAGEVK to the PC using the U
8. H RH H HLL LL AE E E Be Be D I DILE RE E Ll a ad ELL H ee Be Ki PPS PPPS FEFEFE LE a S353 8 LA TEEPE LCLE ECE ELLE Figure 31 Setup for stepper motor 06 17 15 23 www onsemi com 3 Turn on the power supply LV8726TAGEVK User Guide 4 Run M DrAGON version1130 exe 5 Set the following parameters in the GUI please see below example Ses 06 17 15 File Help Motor Stepper EI Figure 32 Motor type and Driver setting window LV8726 Stepper Controller USB Connected File Help Chip Enable Disable REF Voltage L RF Resistance lout Reset Qutput Enable Start Clock Frequency L Top Clock Frequency start Top Time Attenuate Excitation Mode DECAY Mode Step Det Time ver cur Protection Through Cur Protector send Serial Signal cstar stop Re Top Time Record Graph Data Polling Timer Driver LV G 26 Stepper ba Direction User 100975 1 2step ZB5 FAST Blanking Time 0 525 h Chopping Period ON Auto EMO Output 0 5us Can w sec k Hecord Start Bus Figure 33 Setting parameters in the GUI 24 WWW Onsemi com LV8726TAGEVK User Guide Click Enable button The indicator changed to Disable Click Send button Click Send button everytime a parameter is change in the control window Click Start button and then the motor begin to rotate The indicator changed to Stop E odi a
9. LV8726TAGEVK User Guide ON Semiconductor LV8726TAGEVK Evaluation Kit User Guide LV8726TAGEVK User Guide NOTICE TO CUSTOMERS The LV8726TA Evaluation Kit vO is intended to be used for ENGINEERING DEVELOPMENT DEMONSTRATION OR EVALUATION PURPOSES ONLY and is not considered by ON SEMICONDUCTOR to be a finished end product fit for general customer use Information contained in this document regarding the device application and the like is provided only for your convenience ON SEMICONDUCTOR MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED WRITTEN OR ORAL STATUTORY OR OTHERWISE RELATED TO THE INFORMATION INCLUDING BUT NOT LIMITED TO ITS CONDITION QUALITY PERFORMANCE MERCHANTABILITY OR FITNESS FOR PURPOSE The user indemnifies ON SEMICONDUCTOR fully in respect of any claim made against ON SEMICONDUCTOR arising from the use of the LV8726TA Evaluation Kit vO WARNING The LV8726TA Evaluation Kit vO is referenced to the DC supply ground and is not earthed Hence it carries a risk of electric shock Caution is required when the power is applied to the kit Only qualified technicians and or engineers should handle the kit When the power is applied to the kit it is absolutely must that users only probe provided test points and do not touch any other point on the kit 06 17 15 2 www onsemi com le LV8726TAGEVK User Guide Introduction The LV8726TA Evaluation Kit vO is designed to provi
10. OE pin Low The output conforms to the excitation position proceeded by the STEP input Direction CW Clockwise CW FR pin is applied low level CCW Counter clockwise CCW FR pin is applied High level 06 17 15 14 www onsemi com LV8726TAGEVK User Guide Start Clock Top Clock Frequency Start Top Time Re Top Time Update L V8726TAGEVK provides the programmable motor speed sequencer The profile is determined by the following parameters Start Clock Frequency This is the first frequency to start rotation It can be selected from 100pps to 500pps Top Clock Frequency This is the target frequency to rotate a motor by constant speed Reconfiguring of Top Clock Frequency is possible if a motor speed reach the target frequency It can be selected from Start Clock Frequency to 12000pps Start Top Time This is a time until a motor speed becomes TOP Clock Frequency from Start Clock Frequency when pressing a Start button Re Top Time This is a time until a motor speed becomes the reset TOP Clock Frequency from Top Clock Frequency when pressing a Update button Clock Frequency pps Motor Rotational Speed in the graph window lt lt Start Top Time i Manual control E Reconfigured Top Clock Frequency go Top Clock Frequency 9 9 D gt Re Top Time lt Start Clock Frequency Toi Start but
11. SB cable Steps 3 to 11 show the USB driver installation procedure that refers to an expression on Windows 8 32bit This layout and procedure may vary with other operating system version It is required only for the first time when the LV8726TAGEVK is connected to the USB port 3 The Windows OS will try to install driver on its own Wait for a few minutes Installation will fail 4 Click on the Start Menu and open the Control Panel 5 Open the Device Manager 6 Either under Ports COM amp LPT or Other Devices you should see an open port named USB Miconl O Controller File Action View Help egi pg S 4 d a Other devices ig Base System Device i USB Miconl O Controlle Sf Ports COM amp LPT gt gu Print queues gt Li Processors gt Software devices amp Sound video and game co Scan for hardware changes gt amp z Storage controllers Uninstall f Properties gt JE System devices dii Figure 8 Device Manager 1 06 17 15 8 www onsemi com LV8726TAGEVK User Guide 7 Right click on the USB Miconl O Controller port and choose the Update Driver ooftware option If the update driver software option is not available then the Windows OS is still trying to install the driver on its own Wait till the OS finishes self try 8 Next choose the Browse my computer for Driver software option 9 Finally navigat
12. ationship between elapsed time X axis and motor pulse rate Y axis Pulse rate value is as same as tachometer value Maximum level of Y axis is adjusted by Tachometer Max PPS with tachometer The scale of X axis is 5 00msec div Graph is automatically scrolled according to elapsed time Note Please refer to LV8726TA data sheet for the detailed explanation of the GUI s function 06 17 15 20 www onsemi com LV8726TAGEVK User Guide 5 Operation Following steps describe a typical operating procedure Assuming that the device driver has been already installed Step 1 Connect the LV8726TAGEVK to the PC using the USB cable otep 2 Connect the motor to J2 J3 and power supply to J1 VM z Ss IL d I rs E a i d 2 ka a 7 E VET MD AE ENSE 7 on E E L dd ERTFFITIIILIIT DTEIITITNXE Ki aba EC Grin ee KC LI ILLI LL uei F T HNR LL N a COTTLLLLLILITITIILTIITILI Figure 28 Setup for stepper motor Step 3 Turn on the power supply Step A Run M DrAGON version1130 exe W M DrAGON USB Connected pem EE File Help Motor Driver stepper ka S L V8725 Stepper Figure 29 Motor type and Driver setting window 06 17 15 21 www onsemi com LV8726TAGEVK User Guide Step 5 Set the following parameters in the GUI please see below example LV8726 Stepper Controller USB Connected File Help Chip Enable Disable Enable REF Voltage L HF Resistance 0 11 lout
13. de an easy and quick development platform for a bipolar stepper motor control applications using LV8 26TA The kit enables users to develop their customized system solution by utilizing various features of LV8726TA and provides real time development capabilities The kit consists of 1 LV8726TA Evaluation Board L V8726TAGEVK vO with on board microcontroller circuit Daughter board 2 USBcable PM p fet NE e E L NI _ a 1 Tee DC 2683 Q ei PONG POHO ei STEP DE I T NN ic Sts Sr FR WREFIF vA LLL LL E LAAL LAAL E HH H P H EH H H HH T H HH DD E ai al ll cm LI nnm LT si HHHH w M EVK ats E tt B H fe ee oF V8726TAGEVK top view USB cable Figure 1 LV8726TA Evaluation Kit VO 06 17 15 www onsemi com LV8726TAGEVK User Guide 2 Features The kit provides an integrated development platform to drive a bipolar stepper motor Following are key features of the kit LV8726TA Evaluation Board LV8726TAGEVK vO e LV8726TA for a bipolar stepper motor advancement of a step position system control and drive e P N MOSFET based inverter for driving the motor e Daughter board for communication with the PC based Graphical User Interface e Protections for safe operation Over current under voltage Graphical User Interface GUI e Enables users to set modify LV8726TA parameters in real time 3 LV8726TA Evaluation Board EVB Overview The LV8726TA is the c
14. e to and select the driver file named M DrAGON driver inf located in the M DrAGON driver folder And click Next 10 Windows will finish up the driver installation from there How do you want to search for driver software Browse for driver software on your computer Search for driver software in this location Search automatically for updated driver software Windows will search your computer and the Internet for the latest driver software for your device unless you ve disabled this feature in your device installation settings Include subfolders A Browse my computer for driver software Locate and install driver software manually gt Let me pick from a list of device drivers on my computer This list will show installed driver software compatible with the device and all driver software in the same category as the device Reg Cancel Figure 9 USB Miconl O Controller 1 06 17 15 9 www onsemi com LV8726TAGEVK User Guide Note When Windows security is shown please select Install this driver software anyway amp Windows can t verify the publisher of this driver software eh Don t install this driver software You should check your manufacturer s website for updated driver software for your device ch Install this driver software anyway Only install driver software obtained from your manufacturer s website or disc Unsigned software from other sources may harm your computer or steal information
15. entral controller on the EVB that implements a bipolar stepper motor drive provides user selectable system control functions and drives the motor through the on board P N MOSFET based inverter Refer Appendix B for the L V8726TA EVB schematic TR1 TR8 P N MOSFET Based Inverter The EVB has two H bridges outputs constructed in P N MOSFETs TRT TR8 as shown in the board schematic Appendix A Optional diode pads D1 D8 not installed and damping resistors R1 R8 installed are provided to control turn OFF time of P N MOSFETS if needed at jam alc MICE up eld BTS AA Ba 3154 B cio GB2 o v GB3 GB4 Figure 2 P N MOSFET Based Inverter 06 17 15 4 www onsemi com LV8726TAGEVK User Guide J1 DC power supply connector The LV8726TA EVB is designed to operate at 48V typ with the operating voltage range from 9 0V to 55V C1 and C7 are used as a local source and filter for the board To power up the board connect an external power supply to J1 Alternatively connect an external power supply between VM pin 7 and PGND Connector J1 1 VM 2 GND 9 OUT2 EX TRI q x TR3 i E EI Bu A GUIO GU2 Figure 3 DC power supply connector J2 J3 Motor winding connector The LV8726TA can drive one bipolar stepper motor Connect the motor wires to J2 and J3 as shown in Figure 4 The maximum output rating of this board is 6A Because it is limited by the maxmum ratings of R9 and R10 Whe
16. ile name and start preservation of data after Record Start is clicked and stop it when Record End is clicked When the file which already exists is chosen newest data is appended under a previous data The data format is CSV as follows time raw data and pps The data of rpm is not outputted Rollback to Initial value When Rollback to Initial value is clicked all parameters of the Controller window is returned to an initial value ij M DrAGON USB Connected Hel Load parameter setting Save parameter setting Exit Application Figure 25 GUI field description of Motor type and Driver setting window 06 17 15 18 www onsemi com LV8726TAGEVK User Guide Load parameter setting Load the file which is saved the setting data of GUI with Save parameter setting select File in the menu bar at the top of Motor and Driver setting window then select Load parameter setting Current PPS Tachometer Max PPS Figure 26 GUI field description of tachometer window Current PPS The current PPS shows pulse rate which is controlled by microcontroller It is possible to adjust the maximum pulse rate for Tachometer and Graph by using Tachometer Max PPS Motor Rotational Speed pps 5000 4500 4000 3500 3000 2500 2000 1500 1000 500 Elapsed Time msec Figure 27 GUI field description of graph window 06 17 15 19 www onsemi com LV8726TAGEVK User Guide This graph shows the rel
17. licked the STEP signals stop Record Start End It is necessary to choose a file to save Excel data When Record Start button is clicked after a file was chosen the Excel data of Time Motor Rotational speed Clock frequency pps is outputted to selected file When Record End button is clicked this GUI stops the output of Excel data Refer to Export Speed graph data for the details Polling Start Stop Clicked Polling Start button to update REF Voltage tachometer and Graph in real time lout is also recalculated by updating REF Voltage The default setting is that the polling operation works and the button changed to Polling Stop 06 17 15 17 www onsemi com LV8726TAGEVK User Guide LV8726TA Controller USB Connected Help Save parameter setting Export Speed graph data Rollback to Initial value Close window Reset Normal Direction Output Enable On Figure 24 GUI field description of controller window 2 Save parameter setting Output the setting data of GUI Select File in the menu bar at the top of GUI Controller window or Motor and Driver setting window refer to next page then select Save parameter setting Export Speed graph data Output the Excel data of Time Motor Rotational speed Clock frequency pps select File in the menu bar at the top of GUI Controller window then select Export Speed graph data and then input f
18. n driving more than 6A please make adequate arrangement Reference The maxmum ratings of J1 3 connectors are 10A TR1 3 5 7 Pch are 12A And TR2 4 6 8 Nch are 17A Figure 4 Motor winding connector 06 17 15 5 www onsemi com LV8726TAGEVK User Guide USB connector on the Daughter board The regulator on the Daughter board generates VCC 3 3V output from USB power The logic block in LV8726TA and Daughter board are designed to operate at VCC When the external microcontroller is used remove the Daughter board and apply a power supply same as the external microcontroller to VCC E V VREC 1 C SS mm hed Tu El d vcce ez wm WI wm wem L wm emm wm wm RI ele vw LET WW NES l H mg E LR c s ei Ki mim F mini RI T ck EIS MO e GEN SGND m SDO EMO FR VREF F MO USB connector on the daughter board Figure 5 USB connector and VCC pin EMO LED The LV8726TA has the EMO pin which outputs the fault detection The fault events are either over current or under voltage which is selected by the register setting with GUI This pin is the open drain output type and when the fault is detected the EMO pin is placed in the ON EMO Low state LED is provided on the EVB to indicate this fault detection of the device The GUI operation will be described below p VREGI a zi Tu El d se RI us m M Emo MEC Aris 2GND A VREF SDO EMO FR VREF F MO Figure 6 L
19. om MIXED DECAY 25 FAST MIXED DECAY 50 FAST SLOW DECAY FAST DECAY by drop down list Step Det Time The STEP signal detection time can be selected from 0 52 1 04s by drop down list Over current Protection The over current protection circuit can be selected from ON Latch type ON Auto reset type or OFF by drop down list Through Current Protector The through current protector OFF time can be selected from 0 5 1 0 2 0 4 0us by drop down list Blanking Time The blanking time can be selected from 0 5 1 0 2 0 4 0us by drop down list 06 17 15 16 www onsemi com LV8726TAGEVK User Guide Chopping Period The Chopping PWM period can be selected from 5 16 24 32us by drop down list EMO Output EMO output pin can be selected from Over current detection Low voltage detection VM pin voltage monitoring LV8726TA in itself can outputs the fault detection of thermal shutdown TSD when TSD is selected by the register setting However this GUI is not designed to select TSD Send Serial Signal When Send button is clicked all registers are updated And this button is enabled only when IC is enabled state Control window 1 1 Enable button Start Stop marc Record Graph Data Record Start Polling Timer Figure 23 GUI field description of controller window 1 4 Start Stop When Start button is clicked the STEP signals is outputted Then the motor starts rotating When Stop button is c
20. ton Um Update button Time D Click Start button and then a motor starts to rotate at Start Clock Frequency 2 After Start Top Time has passed a motor rotate at Top Clock Frequency 3 It is possible to reconfigure Top Clock Frequency and then click Update button 4 After Re Top Time has passed a motor rotate at Top Clock Frequency Attention When the clock frequency is changed drastically to high there is a possibility to introduce the step out i e the motor misses rotation steps To avoid this the profile must be configured so that the rotation speed is increased gradually 06 17 15 15 www onsemi com LV8726TAGEVK User Guide Attenuate 100955 Excitation Mode 1 2step DECAY Mode 25 FAST Blanking Time DER step Det Time 0 528 Chopping Period Bus Over cur Protection ON Latch EMO Output Over cur det Through Cur Protector D us send Serial Signal Start Stop Figure 22 GUI field description of controller window 1 3 Attenuate The attenuation ratio can be selected form 100 90 80 70 60 50 40 30 by drop down list loj 2 A in window 1 1 is reflected in this attenuate ratio Excitation Mode Selection of the excitation mode steps resolution from 1 2 1 4 1 8 1 16 1 32 1 64 1 128 1 8 1 6 1 12 1 36 1 5 1 10 1 20 1 50 1 100 STEP by drop down list 1 128 Step is the smoothest of all the steps DECAY Mode The current DECAY mode can be selected fr
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