User`s Manual - cnctar.hunbay.com
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1. drivers to share one power supply to reduce cost if the supply has enough capacity To avoid cross interference DO NOT daisy chain the power supply input pins of the drivers Instead please connect them to power supply separately Attention NEVER connect power and ground in the wrong direction as it will damage the ME742 Selecting Supply Voltage The power MOSFETS inside the ME742 can actually operate within 20V 70VDC 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 24 36V leaving room for power fluctuation and back EMF Tel 086 0755 26434369 T Web Site www leadshine com Leadshine Technology Co Ltd ME742 Economical Microstepping Driver Manual V1 0 7 Selecting Microstep Resolution and Driver Output Current This driver uses an 8 bit DIP switch to set microstep resolution and motor operating current as shown below Dynamic Current Microstep Resolution rA 1 2 3 4 5 e 7 8 Standstill Current half full Microstep Resolut2. ele N Ble ae web Oba eee Tite tl soe cee ee ean ees Ley ice ene aes es aint ca pao ence adi satv ban ane tahad ASAE Applications eeteeteeetteettteetttteetttteetttteeetttetestteettttettteetntreetstreetstteetetteetentteees 2 Specifications and Operating Environment estes este eees ee tentenen Electrical Specifications t eeeteeeeeeeeee este eeteteeaeeeenenenenenenetanatatntee Operating Environment and other Specifications s sees estes ee eeseees Mechanical Specifications 1 ssesetisieeteies tees estes estes eases ten eeneseneeieanen 3 Pin Assignment and Description essissesieieesieeies esses tetas serene eeeaeneeneaien Connector P1 Configurations eeeeeeeeeeeeeettteetttteeetttteretttersttteetttteersttterentterenttes Connector P2 Configurations ieee ss ieeeee nese eessieseeeaesieneenesees 4 Control Signal Connector P1 Interface sss eee ieeie sete eeeeeeeeen seein 5 Connecting the Motor crvrrrreeeeeseeeeeseeeseseseeseeeetenensnetetaeaseeeeneeeteeeeetesesasneneneees Comecon o A aI OS eerste nes eerste Comecon oG kad MOa Ea E ieee Half Coil Configurations eeteeeeeteeeetteeetttteeettteetttteeettreetttreeretreenettreers Full Coil Configurations sstssesrseisteeeeieieee ieee eeeeeeeeeaeseeneeneeees Comecei to Boal ieee uaa E TATE EET OOE Sees CO NECLIO IS ox ee a a E a a S N Parilan one a a E O T TEO E 6 Power Supply Selection eeeeeetteetttteetttteetttteetettteretttetsttteestttetttreesntreeetteetenteeees Regulated or Unregul
3. power and motor connections The following tables are brief descriptions of the two connectors of the ME742 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 inside jumper J2 this signal is counter clock CCW pulse effective for high level or low level set by inside jumper J1 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 Selecting Effective Pulse Edge or Effective Level and Control Signal Mode There are two jumpers J1 and J2 inside the ME742 specifically for selecting effective pulse edge or effective level and control signal mode as shown in figure 2 Default setting is PUL DIR mode and off 2 o b J1 short circuit J2 open circuit upward rising edge effective HREH a J1 J2 open circuit PUL DIR mode and effective in upward rising edge PUL DIR mode and effective in downward falling edge n fe 2g off 2 ft c J1 open circuit J2 short circuit d J1 J2short circuit CW CCW mode and effective CW CCW mode and effective in high level The fixed level in low level The fixed level Figure 2 J1 and J2 jumpers Tel 086 0755 26434369 3 Web Site www leadshine com A Leadshine Technology Co Ltd l M
4. tech leadshine com before returning product for service Customer shall prepay shipping charges for products returned to Leadshine for warranty service and Leadshine shall pay for return of products to customer Warranty Limitations Leadshine makes no other warranty either expressed or implied with respect to the product Leadshine specifically disclaims the implied warranties of merchantability and fitness for a particular purpose Some jurisdictions do not allow limitations on how long and implied warranty lasts so the above limitation or exclusion may not apply to you However any implied warranty of merchantability or fitness is limited to the 12 month duration of this written warranty Shipping Failed Product If your product fail during the warranty period e mail customer service at tech leadshine com to obtain a returned material authorization number RMA before returning product for service Please include a written description of the problem along with contact name and address Send failed product to distributor in your area or Leadshine Technology Co Ltd Floor 3 Block 2 Nanyou Tianan Industry Park Nanshan Dist Shenzhen China Also enclose information regarding the circumstances prior to product failure Tel 086 0755 26434369 13 Web Site www leadshine com
5. E742 Economical Microstepping Driver Manual V1 0 Connector P2 Configurations Motor Phase B DC power supply 20 70VDC Including voltage fluctuation and EMF voltage 4 Control Signal Connector P1 Interface The ME742 can accept differential and single ended inputs including open collector and PNP output The ME742 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 Driver R 0 if VCC 5V R 1K Power gt 0 125W if VCC 12V R 2K Power gt 0 125W if VCC 24V R must be connected to control signal terminal Figure 4 Connection to PNP signal common cathode Tel 086 0755 26434369 4 Web Site www leadshine com A Leadshine Technology Co Ltd l l ME742 Economical Microstepping Driver Manual V1 0 5 Connecting the Motor The ME742 driver can drive any 2 pahse and 4 pahse hybrid stepping motors 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 outp
6. OFF OFF ON ON ON OFF OFF ON OFF ON OFF OFF OFF OFF OFF Notes Due to motor inductance the actual current in the coil may be smaller than the dynamic current setting particularly under high speed condition Standstill Current Setting SW4 is used for this purpose OFF meaning that the standstill current is set to be half of the selected dynamic current and ON meaning that standstill current is set to be the same as the selected dynamic current The current automatically reduced to 60 of the selected dynamic current 0 4 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 Leadshine 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 PUL DIR signal pulse direction signal wires and motor 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 the 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 mo
7. Site www leadshine com D RES AET ee AS ME742 Economical Microstepping Driver Problem Symptoms and Possible Causes Microstep resolution setting is wrong Fault condition exists Motor phases may be connected in reverse J Nitch Cul tt W Something Control signal 1 Control signal is interfered wrong with motor coil Current setting is too small Acceleration is set too high nking cooling irrent reduction function not bei Current is set too high Tel 086 0755 26434369 12 Web Site www leadshine com i Leadshine Technology Co Ltd l ME742 Economical Microstepping Driver Manual V1 0 APPENDIX Twelve Month Limited Warranty Leadshine Technology Co Ltd warrants its products against defects in materials and workmanship for a period of 12 months from shipment out of factory During the warranty period Leadshine will either at its option repair or replace products which proved to be defective Exclusions The above warranty does not extend to any product damaged by reasons of improper or inadequate handlings by customer improper or inadequate customer wirings unauthorized modification or misuse or operation beyond the electrical specifications of the product and or operation beyond environmental specifications for the product Obtaining Warranty Service To obtain warranty service a returned material authorization number RMA must be obtained from customer service at e mail
8. User s Manual For ME742 Economical Microstepping Driver Version 1 0 2000 All Rights Reserved Attention Please read this manual carefully before using the driver Leadshine Technology Co Ltd F 3 Block 2 Nanyou Tianan Industry Park Nanshan Dist Shenzhen China PH 86 755 26434369 FAX 86 755 26402718 Web site www leadshine com E Mail sales leadshine com The content in this manual has been carefully prepared and is believed to be accurate but no responsibility is assumed for inaccuracies Leadshine reserves the right to make changes without further notice to any products herein to improve reliability function or design Leadshine does not assume any liability arising out of the application or use of any product or circuit described herein neither does it convey any license under its patent rights of others Leadshine s general policy does not recommend the use of its products in life support or aircraft applications wherein a failure or malfunction of the product may directly threaten life or injury According to Leadshine s terms and conditions of sales the user of Leadshine s products in life support or aircraft applications assumes all risks of such use and indemnifies Leadshine against all damages 2000 by Leadshine Technology Company Limited All Rights Reserved Contents Table of Contents l Introduction Features and Applications iia Tas eo lalesbidse 0 Woe ere bose 010 E E O Ob Fels la
9. ated Power Supply isestsetieeseisesieeeieee es eeeeneseeees Multiple Driyerseeeeeeteetetttteetttteetttttetettteettteestteetstttetsttreestreestteetetteeeesttetes Selecting Supply Voltage sssesisestesiees tee este sete eeesieneeeeeseeseseseeneeneeees 7 Selecting Microstep Resolution and Driver Output Current s rssssserreeeeeeee teers Microstep Resolution Selection eetet ieee sees eeesen Current Settings esses sete ieeeseesiensesaeseessesieneanese Dynamic Current Setting reeeteeeereteeeeeeeeeecteeeeteeeetene nets tetetetatnenenenenens Standstill Current Settings eects eens sete eeeeieneeeaien B Wiring Notes eeeeeeeeeetteeetttteetttteetttteetetteeetttetsttettstteettttetssteeessteeentteetetttetenteeees Contents 9 Typical Connection sissies eeieeeieeeieesneesseeseeenssienesieseseeeseeenseieias 9 10 Sequence Chart of Control Signals ieee tenes ee teeseens 10 ii Proteccion Inon an aa ea A a tae had 11 Over voltage Protections eeeeeeeeeeetttttttererereteretterererererereretstserererereretrenesenens 11 Coil ground Short Circuit Protection ee eeeeeeeteeteetreettteettrerttrertteetterttrerteee 11 12 Frequently Asked Questions eeeeeeettettreettrertteetttertttertteetttesttrertteettreesrrertttet 11 Problem Symptoms and Possible Causeseeeeeeeeettetterttertteettertteerteertrerttes 11 APPENDIK arua EEA E AEE E T O 13 Twelve Month Limited Warrantyeeeeeeeeeetreeettettreetteettteettteettrertteesttertrrertetes 13 Lael hee ler cee ee ee ee 13 Obtaining War
10. d 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 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 s better to use lower supply voltage to decrease noise heating and improve reliability Regulated or Unregulated Power Supply Both regulated and unregulated power supplies can be used to supply the driver However unregulated power supplies are preferred due to their ability to withstand current surge If regulated power supplies such as most switching supplies are 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 if unregulated supply is used 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 of the unregulated supply only during the ON duration of the PWM cycle but not during the OFF duration Therefore the average current withdrawn from power supply is considerably less than motor current For example two 3A motors can be well supplied by one power supply of 4A rating Multiple Drivers It is recommended to have multiple
11. e 7 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 A B B Figure 8 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 9 8 lead motor parallel connections Tel 086 0755 26434369 6 Web Site www leadshine com i Leadshine Technology Co Ltd l l ME742 Economical Microstepping Driver Manual V1 0 6 Power Supply Selection The ME742 can match medium and small size stepping motors from NEMA size 16 to 23 made by Leadshine or other motor manufactures around the world To achieve good driving performances it is important to select supply voltage an
12. ion Selection Microstep resolution is set by SW5 6 7 8 of the DIP switch as shown in the following table Microstep Steps rev for 1 8 motor SWS SW6 SW7 SW8 oF ON ON ON 4 800 ON OFF ON ON 8 1600 OFF OFF ON ON 16 3200 ON ON OFF ON ee OFF ON OFF ON 64 12800 ON OFF OFF ON 18 25600 OFF OFF OFF ON 5 1000 ON ON ON OFF o do 2000 OF ON ON OFF 2002 4000 ON OFF ON OFF ES Soe OFF ON OFF 40 8000 ON ON OFF OFF 50 10000 OFF ON OFF OFF 100 20000 ON OFF OFF OFF ore 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 first three bits SW1 2 3 of the DIP switch are used to set the dynamic current Select a setting Tel 086 0755 26434369 8 Web Site www leadshine com A Leadshine Technology Co Ltd l l ME742 Economical Microstepping Driver Manual V1 0 closest to your motor s required current Dynamic Current Setting ati A a ON OFF ON
13. prove reliability the driver incorporates some built in protections features Over voltage Protection When power supply voltage exceeds 80VDC protection will be activated and power indicator LED will turn red When power supply voltage is lower than 20VDC the driver will not works properly Coil ground Short Circuit Protection Protection will be activated in case of short circuit between motor coil and ground Attention Since there is no protection against power leads reversal it is critical to make sure that power supply leads correctly connected to the driver Otherwise the driver will be damaged instantly 12 Frequently Asked Questions In the event that your ME742 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 document 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 Tel 086 0755 26434369 11 Web
14. ranty Service sss eee estes eee cette tenes ceeneeeneeeeneseees 13 Warranty Limitations tteserer teeter teers teens tenee eects tetas neenetee tens teeeatees 13 Shipping Failed Producte eeeteeeteetretteerttreetttertteerttetttertteertteettrertteentreerrrertttet 13 I i Leadshine Technology Co Ltd l ME742 Economical Microstepping Driver Manual V1 0 1 Introduction Features and Applications Introduction The ME742 is an economical microstepping driver based on patented technology of Leadshine It is suitable for driving 2 phase and 4 phase hybrid stepping motors By using the advanced bipolar constant current chopping technique it can output more speed and torque from the same motor compared with traditional drivers such as L R drivers Its 3 state current control technology allows coil currents to be well controlled and with relatively small current ripple therefore less motor heating is achieved Features Low cost and good high speed torque 15 selectable resolutions Supply voltage up to 70VDC Suitable for 2 phase and 4 phase motors Output current up to 4 2A DIP switch current setting with 8 different Optically isolated input signals values Pulse frequency up to 200 KHz CW CCW mode available optional Automatic idle current reduction Over voltage and short circuit protection 3 state current control technology Small size 118 75 5 33mm Applications Suitable for a wide range of stepping mo
15. tor 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 Web Site www leadshine com A Leadshine Technology Co Ltd l l ME742 Economical Microstepping Driver Manual V1 0 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 10 Figure 10 Typical connection 10 Sequence Chart of Control Signals In order to avoid some fault operations and deviations PUL DIR and ENA signals must abide by some rules as shown in the following diagram assuming J1 default setting is upward rising edge effective t aire n ity High ie 5V PUL High Level gt 3 5V t Sa Low Level lt 0 5V DIR t 5ps e Low Level lt 0 5V L Figure 11 Sequence chart of control signals Tel 086 0755 26434369 10 Web Site www leadshine com i Leadshine Technology Co Ltd l l ME742 Economical Microstepping Driver Manual V1 0 Remark 1 ti ENA must be ahead of DIR by at least Sus logic HIGH as effective Generally ENA and ENA is NC not connected 2 t DIR must be ahead of PUL effective falling edge by at least Sus to ensure correct direction 3 t3 Pulse width not less than 2 5us 4 ta low level width not less than 2 5us 11 Protection Functions To im
16. tors from NEMA size 16 to 23 It can be used in various kinds of machines such as X Y tables labeling machines laser cutters engraving machines pick place devices and so on Particularly adapt to the applications desired with low vibration high speed and high precision 2 Specifications and Operating Environment Electrical Specifications Tj 25 C Tel 086 0755 26434369 i Web Site www leadshine com A Leadshine Technology Co Ltd ME742 Economical Microstepping Driver Manual V1 0 Operating Environment and other Specifications Environment Avoid dust oil fog and corrosive gases bient Ter perature Humidity 40 RH 90 RH per atin 1g Ten perature Vibration 5 9m s Max Figure 1 Mechanical specifications Recommended to use side mounting for better heat dissipation Elimination of Heat Driver s reliable working temperature should be lt 65 C and motor working temperature should be lt 80 C Recommend use automatic idle current reduction mode namely current automatically be reduced to 60 when motor stops so as to reduce driver heating and motor heating Recommend use side mounting to maximize heat sink area Tel 086 0755 26434369 2 Web Site www leadshine com A Leadshine Technology Co Ltd l l ME742 Economical Microstepping Driver Manual V1 0 3 Pin Assignment and Description The ME742 has two connectors connector P1 for control signals connections and connector P2 for
17. ut current P2 A A B B Figure 5 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 P2 B NC Figure 6 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 configuration is also referred to as full copper In full coil mode the Tel 086 0755 26434369 5 Web Site www leadshine com A Leadshine Technology Co Ltd l ME742 Economical Microstepping Driver Manual V1 0 motors should be run at only 70 of their rated current to prevent over heating P2 A N B B Figur
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