P808 Technical Manual
Contents
1. 4Lead Motor Connection amp Lead Motor Series Connections P2 P2 A At ae aE A HE B B B iE i Wc 6 Lead Higher Torque Motor Lead Higher Torque Motor Connections Connections Note that when two coils are connected in parallel coil inductance is reduced by half and motor speed can be significantly increased Serial connection will lead to increased inductance and thus the motor can be run well only at lower speeds 9 Connection Diagram A complete stepping system should include stepping motor stepping driver power supply and controller pulse generator A typical connection is shown below 1 Controllers Indexer 1 Driver Astrosyn International Technology Ltd The Old Courthouse New Rd Ave Chatham Kent ME4 6BE England Tel 44 0 1634 815175 Fax 44 0 1634 826552 10 Control Signal Waveform and Timing This driver can accept pulse control signals up to 300khz Before a direction reversal the direction signal needs to be established at least 2us before the first pulse of the next pulse train Please examine the timing diagrams of the three control signals as follows PUL Fulse signal DIR Direction signal l 1 eens fi UPoBS EWA Enable signal 11 Dimensions External dimensions are shown in mm 102 50 tA 1l 120 Astrosyn International Technology Ltd The Old Courthouse New Rd Ave Chatham Kent ME4 6BE England Tel 44 0 1634 815175 Fax 44 0 1634 8265522. ASTROSYN ADVANCING THE DRIVE TOWARDS MOTOR EFFICIENCY User Manual Model P808 High Performance Microstepping Driver Astrosyn International Technology Ltd The Old Courthouse New Rd Ave Chatham Kent ME4 6BE England Tel 44 0 1634 815175 Fax 44 0 1634 826552 1 General The P808 is a high performance microstepping driver based on the most advanced technology in the world today It is suitable for driving any 2 phase and 4 phase hybrid step motors current 7 7A By using advanced bipolar constant current chopping techniques it can output more speed and power from the same motor compared with traditional technologies such as L R drivers It has patented current control technology which allows coil currents to be accurately controlled generating much less current ripple and motor heating than other drivers on the market Features of this driver High performance at low cost Supply voltage to 90VDC current to 7 7A for P808 Inaudible 20khz chopping frequency TTL compatible and optically isolated input signals Automatic idle current reduction Mixed decay current control for less motor heating 14 selectable step resolutions in decimal and binary Microstep resolutions up to 51 200 steps rev Suitable for 4 6 or 8 lead motors Over current over voltage and short circuit protection Small size Applications of this driver Suitable for a wide range of stepping motors of size NEMA 17 23 34 and 42 usable for various kinds o
3. f machines such as X Y tables labelling machines laser cutters engraving machines and pick place devices particularly useful in applications with low noise low vibration high speed and high precision requirements 2 Specifications and Operating Environment Electrical Specifications T 25 C P808 Parameters Min Typical Max Remark Peak Output Current 2 8A by user 7 7A By DIP switch Supply voltage DC 24V 68V 90V Logic signal current 6mA 10mA 30mA Pulse input frequency 0 By user 300Khz Isolation resistance 500MQ Astrosyn International Technology Ltd The Old Courthouse New Rd Ave Chatham Kent ME4 6BE England Tel 44 0 1634 815175 Fax 44 0 1634 826552 Operating Environment and Parameters Coolant Natural cooling or forced convection Environment Space Avoid water dust oil frost and corrosive gases Temperature 0 to 50 C Humidity 40 to 90 RH Vibration 5 9m s Max Storage Temp 20 C to 65 C Weight About 0 45kg 3 Driver Connectors P1 and P2 The following is a brief description of the two connectors of the driver More detailed descriptions of the pins and related issues are presented in sections 4 and 6 9 Control Signal Connector P1 pins Pin No Signal Functions 1 Pul 5V Pulse signal in single pulse pulse direction mode this input represents pulse 2 Pul pulse signal effective for each upward risi
4. lection It is important to choose the appropriate power supply to make the driver operate properly Maximum Voltage Input The power Mosfet inside the driver can actually operate within 24V to 90VDC including power input fluctuation and back EMF voltage generated by motor coils during motor shaft deceleration Higher voltage will damage the driver Therefore it is suggested to use power supplies with theoretical output voltage of no more than 85V leaving room for power line fluctuation and back EMF Astrosyn International Technology Ltd The Old Courthouse New Rd Ave Chatham Kent ME4 6BE England Tel 44 0 1634 815175 Fax 44 0 1634 826552 Regulated or Unregulated Power Supply Both regulated and unregulated power supplies can be used to supply DC power to the driver However unregulated power supplies are preferred due to their ability to withstand current surge If regulated power supply such as most switching supplies is indeed used it is important to have large current output rating to avoid problems like current clamp for example using 4A supply for 3A motor driver operation On the other hand one may use a power supply of lower current rating than that of motor typically 50 70 of motor current The reason is that the driver draws current from the power supply capacitor only during the ON duration of the PWM cycle but not during OFF duration Therefore the average current withdrawn from power supply is considerably les
5. n off on off 128 25600 on on off off 256 51200 on off off off 5 1000 off on on on 10 2000 off off on on 25 5000 off on off on 50 10000 off off off on 125 25000 off on on off 250 50000 off off on off Current Setting The first three bits SW1 2 3 of the DIP switch are used to set the current during motion dynamic current while SW4 is used to select standstill current P808 DIP Selection for current during motion Current for P808 swi1 SW2 SW3 2 8A on on on 3 5A off on on 4 2A on off on 4 9A off off on 5 7A on on off 6 4A off on off 7 0A on off off 7 7A off off off Note due to motor inductance actual coil current may be smaller than dynamic current settings particularly at higher speeds DIP Selection for current during standstill SW4 is used for this purpose current setting due to coil inductance OFF meaning that the standstill current is set to be half of the dynamic current and ON meaning that standstill current is set to be the same as dynamic current Astrosyn International Technology Ltd The Old Courthouse New Rd Ave Chatham Kent ME4 6BE England Tel 44 0 1634 815175 Fax 44 0 1634 826552 7 Control Signal Connector P1 Interface This driver uses differential inputs to increase noise immunity and interface flexibility Single ended control signals from the indexer controller can also be accepted by this interface The input circuit has buil
6. ng edge in double pulse mode pulse pulse this input represents clockwise CW pulse For reliable response pulse width should be longer than 3us 3 Dir 5V Direction signal in single pulse mode this signal has low high voltage levels representing two directions of motor rotation in double pulse mode set by inside 4 Dir Dir jumper JMPI this signal is counter clock CCW pulse effective on each rising edge For reliable motion response direction signal should be sent to driver 21s before the first pulse of a motion direction reversal 5 Enat 5V Enable signal this signal is used for enable disable high level for enabling driver and low level for disabling driver Usually left unconnected enabled 6 Ena Ena Remark 1 Pul dir is the default mode internal jumper JMP1 can be used to switch to CW CCW double pulse mode Remark 2 Please note motion direction is also related to motor driver wiring match Exchanging the connection of two wires for a coil to the driver will reverse motion direction for example reconnecting motor A to driver A and motor A to driver A will invert motion direction Power connector P2 pins Pin No Signal Functions 1 Gnd DC power ground 2 V DC power supply 24VDC to 90VDC Including voltage fluctuation and EMF voltage 3 4 Phase A Motor coil A leads A and A 5 6 Phase B Motor coil B leads B and B 4 Power Supply Se
7. oper Output Current For a given motor higher driver current will make the motor to output more torque but at the same time causes more heating in the motor and driver Therefore output current is generally set to be such that the motor will not overheat during lengthy operation Since parallel and serial connections of motor coils will significantly change resulting inductance and resistance it is important to set driver output current depending on motor phase current motor leads and connection methods Phase current rating supplied by motor manufacturer is important in selecting driver current but the selection also depends on leads and connection Astrosyn International Technology Ltd The Old Courthouse New Rd Ave Chatham Kent ME4 6BE England Tel 44 0 1634 815175 Fax 44 0 1634 826552 6 Microstep Resolution and Driver Current Output This driver uses an 8 bit DIP switch to set microstep resolution dynamic current and standstill current as shown below Current during motion Microstep resolution an lt r o i as on 1 2 3 4 5 6 7 8 l Standstill Current halffullh Microstep Resolution Selection Microstep resolution is set by DIP SWS 6 7 8 as shown in the following table Microstep Step rev for 1 8 motor SW5 SW6 SW7 SW8 0 No rotation off off off off 2 400 on on on on 4 800 on off on on 8 1600 on on off on 16 3200 on off off on 32 6400 on on on off 64 12800 o
8. s than motor current For example two 3A motors can be well supplied by one power supply of 4A rating Multiple Drivers It is recommended that multiple drivers share one power supply to reduce cost provided that the supply has enough capacity DO NOT daisy chain the power supply input pin of the drivers connect them to power supply separately to avoid cross interference Higher supply voltage will allow higher motor speed to be achieved at the price of more noise and heating If the motion speed requirement is low it is better to use lower supply voltage to improve noise heating and reliability NEVER connect power and ground in the wrong way it will damage the driver 5 Driver Voltage and Current Selection This driver can match small medium size step motors NEMA 17 23 34 and 42 To achieve good driving results it is important to select supply voltage and output current properly Generally supply voltage determines the high speed performance of the motor while output current determines the output torque of the motor particularly at lower speed Selecting Supply Voltage Higher supply voltage can increase motor torque at higher speeds this is helpful for avoiding losing steps However higher voltage may cause more motor vibration at lower speed and it may also cause over voltage protection and even driver damage Therefore it is suggested to choose only sufficiently high supply voltage for intended applications Setting Pr
9. t in high speed optocoupler and can accept signals in the format of line driver open collector or PNP output Line driver differential signals are suggested for reliability In the following figures connections to open collector and PNP signals are illustrated Open collector signal common YCC PULt z0 Puke signal i l Ha Dirac lon sgnal E FIL DIR 2702 E ag I DIR mie EMAt 270 Enable signal E a EFA cha R O t YCC Sut R iK ff WEC 12 3 R 2k N VOC 2uy L J Not tat R zbori be sere conected t te contolersigiak Pal Dir EAr A e Bia lie Bad orice PNP output common anode vec eee i Driver wlee signal Tos signal E FUL a 270 St __ a K FUL 1 Controller vec Direction signal 2T0G ah Fuable signal Enable signal R 0 It WoO ay So fat ge te t ee R 1k It YOC 17 R 2k It WD dat Mote tat R mould be serait sonnented bo te controller gnali Ful Oir Ena jinitead of Woo Astrosyn International Technology Ltd The Old Courthouse New Rd Ave Chatham Kent ME4 6BE England Tel 44 0 1634 815175 Fax 44 0 1634 826552 8 Driver Connection to Stepper Motors The P808 driver can drive any 4 6 or 8 lead hybrid stepper motors The following diagrams illustrate connection to various kinds of motor leads F2 P2 F At At At A A AS B Bt oe E B B 8 Lead Motor Parallel Connections
Download Pdf Manuals
Related Search