User`s Manual
Contents
1. Alarm signal positive READY is a photocouper output from open collector circuit effectively output when driver operate normally maximum permitted input voltage is 30VDC maximum output current 20mA It generally can be serial connected to PLC input terminal Notes SW5 ON means CW CCW pulse pulse mode and SW5 OFF means PUL DIR mode Connector P2 Configurations Motor phase A Ground terminal Recommend connect this port to the ground for better safety 22078 High Performance Microstepping Driver V1 0 4 Control Signal Connector P1 Interface The 22078 can accept differential and single ended inputs including open collector and PNP output The 22078 has 3 optically isolated logic inputs which are located on connector P1 to accept line driver control signals These inputs are isolated to minimize or eliminate electrical noises coupled onto the drive control signals Recommend use line driver control signals to increase noise immunity of the driver in interference environments In the following figures connections to open collector and PNP signals are illustrated i Controller Driver r L i Figure 2 Connections to open collector signal common anode Controller K 0 if WOC 8 k R IK Powor gt 0 125W if YCC 123V R 2K Powor gt 0 125W if WOC 24 E musi be connected to control signal terminal Figure 3 Connection to PNP signal common cathode 5 Connecting the Motor The2. Manual V1 0 Mechanical Specifications unit mm inch 25 4 mm Ts oe wo tk m Figure 1 Mechanical specifications Operating Environment and Other Specifications Environment Avoid dust oil fog and corrosive gases Humidity 40 RH 90 RH Vibration 5 9m s Max Approx 1 16 kg 41 oz Elimination of Heat Driver s reliable working temperature should be lt 65 motor working temperature should be lt 80 Forced cooling the driver if it s necessary 22078 High Performance Microstepping Driver V1 0 3 Pin Assignment and Description The 22078 has two connectors connector P1 for control signals connections and connector P2 for power and motor connections The following tables are brief descriptions of the two connectors of the 22078 More detailed descriptions of the pins and related issues are presented in section 4 5 9 Connector P1 Configurations DIR signal In single pulse mode this signal has low high voltage levels representing two directions of motor rotation in double pulse mode set by SW5 this signal is counter clock CCW pulse effective for high level For reliable motion response DIR signal should be ahead of PUL signal by Sus at least 4 5V when DIR HIGH 0 0 5V when DIR LOW Please note that 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
3. 22078 can drive 2 pahse and 4 pahse hybrid stepping motors 22078 High Performance Microstepping Driver V1 0 Connections to 4 lead Motors 4 lead motors are the least flexible but easiest to wire Speed and torque will depend on winding inductance In setting the driver output current multiply the specified phase current by 1 4 to determine the peak output current P2 Figure 4 4 lead Motor Connections Connections to 6 lead Motors Like 8 lead stepping motors 6 lead motors have two configurations available for high speed or high torque operation The higher speed configuration or half coil is so described because it uses one half of the motor s inductor windings The higher torque configuration or full coil uses the full windings of the phases Half Coil Configurations As previously stated the half coil configuration uses 50 of the motor phase windings This gives lower inductance hence lower torque output Like the parallel connection of 8 lead motor the torque output will be more stable at higher speeds This configuration is also referred to as half chopper In setting the driver output current multiply the specified per phase or unipolar current rating by 1 4 to determine the peak output current Figure 5 6 lead motor half coil higher speed connections Full Coil Configurations The full coil configuration on a six lead motor should be used in applications where higher torque at lower speeds is desired This con
4. User s Manual 22078 High Performance Microstepping Driver Version 1 0 2000 All Rights Reserved Attention Please read this manual carefully before using the driver Contents Table of contents 1 Introduction Features and Applications cccccccceecceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees l Mi oduc Oee NAN l ES A Ue e atoacigs tans genaka ec etna ceistecs sales eat egamaees eee en teh ce anen ecca Stead een ciate l ADPHCIODS nian aa aa a aa a a a a a a a aa l De SPECIGI ONS eri a ea etc T T ene lea ated ie T E E rt rata lie l Elcinical Specical ONS eaaa aa aa aa a l Mechanical SPeCiiCalONs nerga ti Erana E RE E 3 Operating Environment and Other Specifications ccccccccccccccccccceeceeeceeeeeeeeeeeeees 3 Elimination ot Heahea ENE 3 3 Pin Assignment and Descriptio eeii e e e Side eeied 4 Connector P IWC Ont Cura Ons sesucen e aT 4 Connector P2 C OniC Ufa OMS eseina A O 4 4 Control Signal Connector P1 Interfaces ereere EEEE EEEE 5 oe Geol sleeper mal oahy 0100 erenaam SEER UOT RU PERCE EU Dy ter Ry PERC eT RUM MUE RY PERCE NURS Ent tay 5 Connectioms to 4 lead Motors seses irene ra E E 6 Connections to G lead Motors seccacinie nan NARA UNR 6 Han Coils onfieura ons esna E ee e 6 Pull Coille onf outitionS esia EN EE EAN E URCU UEU 6 Connections to 8 lead MOtofS nnnnnnnnnnennnnsererereerrerrrrrrerrrerrrrrrrrrrrerrresrrrrreeereeens T Series CONNECHOMS arrana A A eee ee eee 7 ParallelC
5. c HIGH as effective Generally ENA and ENA is NC not connected 2 t2 DIR must be ahead of PUL effective edge by at least 5us to ensure correct 22078 High Performance Microstepping Driver V1 0 direction 3 t3 Pulse width not less than 1 2us 4 t4 Low level width not less than 1 2us 11 Protection Functions To improve reliability the driver incorporates some built in protection features Over voltage Protection When power supply voltage exceeds 250VAC protection will be activated and LED will turn red When power supply voltage is lower than 80VAC the driver will not works properly Short Circuit Protection Protection will be activated in case of short circuit between motor coils or between motor coil and ground Wrong Motor Connection Protection Protection will be activated when the motor is connected in a wrong way When above protections are active the motor shaft will be free or the LED will turn red Reset the driver by repowering it to make it function properly after removing above problems 12 Frequently Asked Questions In the event that your 22078 doesn t operate properly the first step is to identify whether the problem is electrical or mechanical in nature The next step is to isolate the system component that is causing the problem As part of this process you may have to disconnect the individual components that make up your system and verify that they operate independently It is important to d
6. eeeseesaessaeeaeeeaeaaaas 12 ori a Aa Ore O A a high Spero Pip OAID a a a Olek to run at higher smoothness less vibration and lower noise Its 3 state current control technology I Frequently Asked Questions E E E E E E E E E T 12 allows coil current to be well controlled with relatively small current ripple therefore less motor Problem Symptoms and Possible Causes ccc ssscssssccceceeeeeeeeeeeseseeeeessssnneaeeees 12 heating is achieved Features High quality low price Input frequency up to 400KHz Low heating for motor amp driver 16 microstep resolutions selectable Supply voltage up to220VAC Suitable for 2 phase and 4 phase stepping Output current up to 7 8A 5 57 ARMS motors TTL compatible and Opto isolated inputs DIP switch current setting Automatic idle current reduction CW CCW mode selectable Applications Suitable for large and medium automation machines and equipments such as engraving machines labeling machines cutting machines laser phototypesetting systems plotting instruments NC machines pick place devices and so on Particularly adapt to the applications desired with low vibration high speed and high precision 2 Specifications Electrical Specifications T 25 E N cai il _ Output current 0 42 0 3ARMS Supply voltage 80 180 220 VAC Logie signal current 7 10 16 mA _ Pulse input frequency 0 oe 400 Khz Isolation resistance 500 Mo II i 22078 Microstepping Driver
7. erformances it is important to select supply voltage and output current properly Generally speaking supply voltage determines the high speed performance of the motor while output current determines the output torque of the driven motor particularly at lower speed Attention For safety and to improve reliability it is recommended to use isolation transformer instead of directly use network source to supply the 22078 Recommend use isolation transformers with theoretical output voltage of 80 180VAC leaving room for power fluctuation and back EMF And the power of the isolation transformer should larger than 500 watts Selecting Supply Voltage The 22078 can actually operate within 80V 220VAC including power input fluctuation and back EMF voltage generated by motor coils during motor shaft deceleration Higher supply voltage can increase motor torque at higher speeds thus helpful for avoiding losing steps However higher voltage may cause bigger motor vibration at lower speed and it may also cause over voltage protection or even driver damage Therefore it is suggested to choose only sufficiently high supply voltage for intended applications and it is suggested to use power supplies with theoretical output voltage of 80 180 VAC leaving room for power fluctuation and back EMF If the motion speed requirement is low it s better to use lower supply voltage to decrease noise heating and improve reliability 7 Selecting Micro
8. figuration is also referred to as full copper In full coil mode the motors should be run at only 70 of their rated current to prevent over heating 22078 High Performance Microstepping Driver V1 0 Figure 6 6 lead motor full coil higher torque connections Connections to 8 lead Motors 8 lead motors offer a high degree of flexibility to the system designer in that they may be connected in series or parallel thus satisfying a wide range of applications Series Connections A series motor configuration would typically be used in applications where a higher torque at lower speeds is required Because this configuration has the most inductance the performance will start to degrade at higher speeds In series mode the motors should also be run at only 70 of their rated current to prevent over heating P2 At B B Figure 7 8 lead motor series connections Parallel Connections An 8 lead motor in a parallel configuration offers a more stable but lower torque at lower speeds But because of the lower inductance there will be higher torque at higher speeds Multiply the per phase or unipolar current rating by 1 96 or the bipolar current rating by 1 4 to determine the peak output current Figure 8 8 lead motor parallel connections 22078 High Performance Microstepping Driver V1 0 6 Power Supply Selection The 22078 can match large and medium size stepping motors from NEMA size 34 to 43 To achieve good driving p
9. n also depends on leads and connections The first three bits SW6 7 8 9 of the DIP switch are used to set the dynamic current Select a setting closest to your motor s required current Dynamic Current Setting 0630 45 OFF OFF OFF ON Da FCF ON COFFE 188 14 OF OFF ON ON Oo S o S S o 285 204 OF ON OFF ON Ooo S o O CON S 375 2 68 OFF ON ON ON D6 SON OF O OF OFO 465 3 32 ON OFF OFF ON SAB O OFF ON COFFE 22078 High Performance Microstepping Driver V1 0 Ooo o o OFF ON ON 65 439 N N CFF sCOF 60 4n O ON OFF ON 720000 5U ON aa OR 780 5 57 ON ON ON ON Notes Due to motor inductance the actual current in the coil may be smaller than the dynamic current settings particularly under high speed condition Standstill Current The 22078 has automatic idle current reduction function The current automatically be reduced to 60 of dynamic current setting 0 2 second after the last pulse Theoretically this will reduce motor heating to 36 due to P I R of the original value If the application needs a different standstill current please contact us Control Signal Mode Setting SW5 is used for this purpose SW5 ON means CW CCW pulse pulse mode and SW5 OFF means PUL DIR mode 8 Wiring Notes In order to improve anti interference performance of the driver it is recommended to use twisted pair shield cable To prevent noise incurred in pulse dir signal pulse direction signal wires and motor
10. ocument each step in the troubleshooting process You may need this documentation to refer back to at a later date and these details will greatly assist our Technical Support staff in determining the problem should you need assistance Many of the problems that affect motion control systems can be traced to electrical noise controller software errors or mistake in wiring Problem Symptoms and Possible Causes Symptoms Possible Problems Motor is not rotating No power 22078 High Performance Microstepping Driver V1 0 Microstep resolution setting is wrong Fault condition exists Motor phases may be connected in reverse Something wrong with motor coil Control signal is interfered Something wrong with motor coil Current setting is too small Acceleration is set too high Inadequate heat sinking cooling Current is set too high
11. onne onsere r mn a Oe OP Pr oP Pe d Power Sonno ECON oi15t sunset ane tnd moat noe And moet mnt moral eee ail ahs Samet ad 8 Deleciine Supply VONAT Cs t 4 s c1sseNaatscdesaassagss S 8 7 Selecting Microstep Resolution and Driver Output Current ccccccceeeeeeeeeeeeees 8 Microstep Resolution SeleCuOnis2250 ci ee area OAE 8 CNTR TIE ocne Sc filed Sisto a ROEA 9 Dynamic Current Setini sos sc os bes sete oe Sats ace aaa asa vawsa te 9 Standstill Cue CN estas atten aeolian Geen unis eee Gee 10 Control Sienal Mode Setini ressora aa NEEE 10 Contents 22078 Microstepping Driver Manual V1 0 Os MTU IN as se sie cca tes EEE EEEE EAEE EAEE 10 ee 1 Introduction Features and Applications 9 Typical COMME CUI OM seieren enisi iiir E i eA E irna Eain Erna 10 10 Sequence Chart of Control Signals ccccccccccccccccccceceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeenes 1 Introduction He Proteccion PONCHON S cece Senses erer ienr errer EERE EREE EN 12 l l l l l l The 22078 is a high voltage and high performance microstepping driver based on one of the most Over voltage Protection ET LEE EE EL EERE ERE aE ET a 12 advanced technologies in the world today It s suitable for driving 2 phase and 4 phase hybrid Short Circuit P POLE CMON sssrinin Eine E En Errn ese a ENE E KEE EEEN ai 12 stepping motors By using advanced bipolar constant current chopping technique the 22078 can Wrong Motor Connection Protection ccccccccccsccccceeceeeeeeeeeeeee
12. step Resolution and Driver Output Current This driver uses a 9 bit DIP switch to set microstep resolution motor operating current and control signal mode as shown in the following figure Microste p Dynamic Resolution Current m 1 2 3 4 5 6 7 8 9 PUL DIR or CW CCW selection Microstep Resolution Selection Microstep resolution is set by SW1 2 3 4 of the DIP switch as shown in the following table Steps rev for 1 8 motor Swi SW2 SW3 SW4 400 ON ON ON ON 22078 High Performance Microstepping Driver V1 0 500 CFE ON ON ON 600 ON CFF ON ON 800 CFF OFF ON ON 000 ON ON COFF ON 1200 sCFF ON OFF ON o lo ON OFF OFF YON 2000 CFE OFF OFF ON 2400 ON ON ON COFFE 3200 OFF ON ON OFF 4000 ON OFF ON OFF 5000 OFF OFF ON OFF 6000 ON ON OFF OFF 6400 CFF ON OFF OFF 8000 ON OOFF OFF OFF 10000 OF OFF OFF OFF Current Settings 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 for long time operation Since parallel and serial connections of motor coils will significantly change resulting inductance and resistance it is therefore 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 however the selectio
13. wires should not be tied up together It is better to separate them by at least 10 cm otherwise the disturbing signals generated by motor will easily disturb pulse direction signals causing motor position error system instability and other failures If a power supply serves several drivers separately connecting drivers is recommended instead of daisy chaining It is prohibited to pull and plug connector P2 while the driver is powered ON because there is high current flowing through motor coils even when motor is at standstill Pulling or plugging connector P2 with power on will cause extremely high back EMF voltage surge which may damage the driver 9 Typical Connection A complete stepping system should include stepping motor stepping driver power supply and controller pulse generator A typical connection is shown as figure 9 22078 High Performance Microstepping Driver V1 0 Controller MD2278 Driver ENABLE AL Power B0 to 220V Stepper Moter Red if VoCe5y ReIK Powers0 1258 if VoOCe12y Rash Powers0 1258 if VOC 2AV must be connected to control signal terminal Figure 9 Typical connection 10 Sequence Chart of Control Signals In order to avoid some fault operations and deviations PUL DIR and ENA signals should abide by some rules shown as following diagram PUL DIR o CW CCW Figure 11 Sequence chart of control signals Remark 1 tl ENA must be ahead of DIR by at least 5us logi
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