WS-2H542M
Contents
1. pulse pulse this input represents clockwise CW pulse For reliable response pulse width should be longer than 1 5us DIR 5V Direction signal in single pulse mode this signal has low high voltage levels representing two directions of motor rotation in double pulse DIR DIR mode set by inside jumper JMP1 this signal is counter clock CCW pulse effective on each rising edge For reliable motion response direction signal should be sent to driver 2us before the first pulse in the reverse motion direction ENA 5V Enable signal this signal is used for enable disable high level for ENA ENA enabling driver and low level for disabling driver Usually left unconnected enabled Remark 1 Pul dir is the default mode under cover 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 20VDC 50VDC 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 WS 2H542M Low Cote Microstepping Driver V1 0 4 C2. eee e eee ee ee ee ence eeeeeeeee esse eeeeeseeeeterseeeseeseeeseeeeeeeeeeees 11 Connection Diagram for Driver Motor Controller eetere 12 Introduction Features and Applications current ripple and therefore less motor heating Features of this driver Patented technology High performance low cost Supply voltage up to 50VDC current output up to 4 2A peak Optically isolated input signals pulse frequency up to 400 KHz Automatic idle current reduction 3 state current control for less motor heating 16 selectable resolutions in decimal and binary Suitable for 4 6 8 lead motors Stepping on upward or downward pulse edge selectable DIP switch current setting with 8 different value CW CCW mode available optional Over voltage and short circuit protection Small size 118x75 5x33mm Applications of this driver Suitable for a wide range of stepping motors of Nema 17 23 and 34 and usable for various kinds of machines such as X Y tables labeling machines laser cutters engraving machines and pick place devices Particularly useful in applications with low vibration high speed and high precision are desired WS 2H542M Low Cote Microstepping Driver V1 0 2 Specifications and Operating Environment Electric Specifications T 25 C WS 2H542M Parameters Min Typical Max Unit Output Current 0 54 4 2 RMS 3A Amps Supply voltage DC 20 36 5
3. for power line fluctuation and Back EMF 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 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 8 WS 2H542M Low Cote Microstepping Driver V1 0 during 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 drivers to share one power supply to reduce cost provided that the supply has enough capacity To avoid cross interference DO NOT daisy chain the power supply input pin of the drivers instead please connect them to power supply separately Higher supply voltage will allow higher motor speed to be achieved at the price of more noise and heat
4. these details will greatly assist our Technical Support staff in determining the problem should you need assistance 13 WS 2H542M Low Cote Microstepping Driver V1 0 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 Symptom Possible Problem No power Invalid microstep resolution select setting Motor not rotating DIP switch current setting is wrong Fault condition exists Unit is disabled Motor rotating in the to Motor phases may be connected in reverse wrong direction DIP switch current setting is wrong Unit in fault Motor phase winding shorted Power input or output driver electrically overstressed Motor or power wiring unshielded or not twisted pair Logic wiring next to motor power wiring Erratic motor motion Ground loop in system Open winding of motor Phase bad on driver DIP switch current setting is wrong Motor stalls during Motor is undersized for application acceleration Acceleration on controller is set too high Power supply voltage too low Inadequate heat sinking cooling Excessive motor and driver Current reduction not being utilized heating Current set too high 14
5. 0 VDC Logic signal current 7 10 16 mA Pulse input frequency 0 300 Khz Isolation resistance 500 MQ Operating Environment and Parameters Cooling Natural cooling or forced convection Environment Space Avoid dust oil frost and corrosive gas Temperature 0 Q 50 C Humidity 40 90 RH Vibration 5 9m s Max Storge Temp 20 C 125 C Weight Approx 0 280 Kg 9 9 oz Mechanical Dimensions unit mm 1 inch 25 4 mm Front View Side View Figure 1 Mechanical dimensions Recommended to use side mounting for better heat dissipation WS 2H542M Low Cote Microstepping Driver V1 0 Extra Heat Sink e Driver s reliable working temperature should be 65 C motor temperature 80 C e It is recommended automatic half current mode i e current automatically reduced by 60 when motor stops so as to decrease driver and motor s heating e Please mount the driver vertically to maximize heat sink area 3 Driver Connectors P1 and P2 The driver has two connectors P1 for control signals and P2 for power and motor connections 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 section 4 5 6 9 Control Signal Connector P1 pins Signal Functions PUL 4 5V Pulse signal in single pulse pulse direction mode this input represents PUL PUL pulse signal effective for each upward rising edge in double pulse mode
6. CW are shown on the following Default mode out of factory is PUL DIR mode J3 open collector J3 short circuit PUL DIR mode CW CCW mode 5 Driver Connection to Step Motors WS 2H542M driver can drive any 4 6 8 lead hybrid step motors The following diagrams illustrate connection to various kinds of motor leads in kr ae re i i Ba a He oo ii a Sead Bite Paali Corer idan Mein Cornet Blaai biro Saris Connections F2 Fl Bu ft F B ic i Laad lighar Tapa Minter E Load hiy i ma Brin Camnawband Linichtna Figure 3 Driver Connection to Step Motor Note that when two coils are parallelly connected 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 WS 2H542M Low Cote Microstepping Driver V1 0 5 1 Connecting 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 Connection 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 Use the per phase or unipolar current rating as the peak output current or multiply the bipolar current rating by 1 4 to determine the peak outpu
7. HO COMNECTKE Figure 6 6 Lead Half Coil Higher Speed Motor Connections Full Coil Confuguration 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 Use the per phase or unipolar current rating as the peak output current PHASE A Ho SOMME CTIOM PRA A PHASE B Hi ORPIECTEON PHASE B Figure 7 6 Lead Full Coil Higher Torque Motor WS 2H542M Low Cote Microstepping Driver V1 0 5 3 Connection 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 PHASE A O PHASE PHASE B PHASE B C Figure 8 4 Lead Motor Connections 6 Power supply Selection Driver Voltage and Current Selection 6 1 Power Supply Selection It is important to choose appropriate power supply to make the driver operate properly and deliver optimal performance Maximum Voltage Input The power MOSFETS inside the driver can actually operate within 20V 50VDC 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 52V leaving room
8. User s Manual For WS 2H542M Low Cost Microstepping Driver Version 1 0 2000 All Rights Reserved Attention Please read this manual carefully before using driver Jiangsu Provincial Foreign Trade Corporation 2602 xinhua mansion No 55 Zhongshan Road Nanjing Tel 86 25 84795706 Fax 86 25 847957 16 WO MANDNFWNHE 10 Control Signal Waveform and Timing 11 Wire Connection 1 WS 2H542M is a low cost high performance microstepping driver based on most advanced technology in the world today It is suitable for driving any 2 phase and 4 phase hybrid step motors By using advanced bipolar constant current chopping technique it can output more speed and power from the same motor compared with traditional technologies such as L R drivers Its 3 state current control technology allows coil currents to be well controlled with relatively small Table of Contents Introduction Features and Applications sesssseseteseeeeeeeeeeeeteeeeteeeteenneeennees 1 Specifications and Operating Environment ss ssescseeeereeeseteeeeeteeeeeeteeees 2 Driver Connectors P1 and P2 ssseeseeeseeeeesececeseeeeesseseresaeesseeeeesecnseseeneeseeeneens 3 Control Signal Connector P1 Interface 4 Driver Connection to Motors P2 eesse re dS Power Supply and Driver Voltage and Current 8 Selecting Microstep Resolution and Driver Current Output eersten 10 Protection FUNCtions 1 cecee reese eens
9. ing If the motion speed requirement is low it s better to use lower supply voltage to improve noise heating and reliability NEVER connect power and ground in the wrong direction as it will damage the driver 6 2 Driver Voltage and Current Selection This driver can match small and medium size step motors NEMA 17 23 amp 34 made by Leadshine or other motor manufactures from around the world 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 driven motor particularly at lower speed Selecting Supply Voltage Higher supply voltage can increase motor torque at higher speeds thus 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 Proper Output Current a Fora 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 b Since parallel and serial connections of motor coils will significantly change resulting inductance and re
10. ivated in case of short circuit between motor coil and ground c Over current Protection Protection will activated in case of short current which may otherwise damage the driver Attention since there is no protection against power leads reversal it is critical to make sure that power supply leads correctly connected to driver Otherwise the driver will be damaged instantly 11 WS 2H542M Low Cote Microstepping Driver V1 0 9 Connection Diagram for Driver Motor Controller Remark A complete stepping system should include stepping motor stepping driver power supply and WS 2H542M Low Cote Microstepping Driver V1 0 1 tl ENA must be ahead of DIR by at least Sus logic HIGH as valid Generally controller pulse generator ENA and ENA is NC not connected A typical connection is shown below 2 t2 DIR must be ahead of PUL effective rising edge by Sus to ensure correct direction cg so euaes zc E 3 t3 Pulse width not less than 1 5us 10 EN H 4 t4 low level width not less than 1 5us iT T Kk F iE iu i e ic i 11 Wire Connection i n L 1 In order to improve driver noise rejection it is recommended to use twisted 3 E ik i k i pair shield cable f S 2 To prevent noise incurred in pulse dir signal Pulse direction signal wires IC ENEFLY Do SUFPLT l f MAT zime DRIVER and motor wires should not be tied up together It is better to separate them by at least 10 cm othe
11. ontrol 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 built in high speed opto coupler 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 Qpen coll ector conmon anode r tatele R if VOV RIK if VHV R K if VAV R mst be connected to controller si gnal ternnnal PNP out put conmon cat hoad R 0 if VCC 5V R 1K if VCC 12V n R 2K if VCC 24V R must be connected to controller signal terminal WS 2H542M Low Cote Microstepping Driver V1 0 Selecting Effective Pulse Edge WS 2H542M can move motor one microstep upon receiving the upward rising or downward falling edge of a pulse depending on the JMP1 setting under driver cover as shown on the below default setting is upward rising edge effective J1 open collector J1 short circuit Effective in upward rising edge Effective in downward falling edge Selecting CW CCW and PUL DIR Mode There is a jumper JMP3 inside the driver specifically for the purpose of selecting pulse signal mode Settings for one pulse mode PUL DIR and for double pulse mode CW C
12. rwise the motor noise will easily disturb pulse Ti i TEJ i THT FELA direction signals motor position error system instability and other types of STEP MOT F o ATE i BITOR n cal T EIER failure 3 If a power supply serves several drivers separate connections drivers is Figure 9 Driver connection in a stepping system recommended instead of daisy chaining 4 Itis prohibited to pull and plug connector P2 while driver is powered ON 10 Control signal Waveform and Timing as there is still high current flowing through coil even when motor is In order to avoid some fault operation and deviation PUL DIR and ENA must accord with some stopped Pulling and plugging P2 with power on will cause extremely high parameters as following diagram assuming JUMPER2 default setting is upward rising edge of voltage surge EMF destroy the dirver pulse being valid ae ee 12 Frequent Asked Questions In the event that your WS 2H542M 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 i i individual components that make up your system and verify that they operate independently It is Low level lt 0 5 V 12 important to document each step in the troubleshooting process You may need this documentation to refer back to at a later date and
13. sistance it is therefore important to set driver output current depending on motor phase current motor leads and connection methods c Phase current rating supplied by motor manufacturer is important to selecting driver current but the selection also depends on leads and connection WS 2H542M Low Cote Microstepping Driver V1 0 7 Selecting Microstep Resolution and Driver Current Output This driver uses an 8 bit DIP switch to set microstep resolution and motor operating current as shown below Current during motion Microstep resolution Tandil Current halffull 7 1 Microstep Resolution Selection Microstep resolution is set by SW5 6 7 8 of the DIP switch as shown in the following table Microstep ustep rev for 1 8 motor SW5 SW6 SW7 Sw8 2 400 Off On On On 4 800 On Off On On 8 1600 Off Off On On 16 3200 On On Off On 32 6400 Off On Off On 64 12800 On Off Off On 128 25600 Off Off Off On 5 1000 On On On Off 10 2000 Off On On Off 20 4000 On Off On Off 25 5000 Off Off On Off 40 8000 On On Off Off 50 10000 Off On Off Off 100 20000 On Off Off Off 125 25000 Off Off Off Off 7 2 Current Setting The first three bits SW1 2 3 of the DIP switch are used to set the current during motion dynamic current Select a setting closest to your motor s required current DIP Setting for current during motion Peak current RMS swi S
14. t current PHASE A PHASE ee p PHASE Figure 4 8 Lead Motor Series Connections Parallel Connection 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 PHASE A PHASE A PHASE AG PHASE B Figure 5 8 Lead Motor Parallel Connections 5 2 Connection 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 6 WS 2H542M Low Cote Microstepping Driver V1 0 one half of the motor s inductor windings The higher torque configuration or full coil use the full windings of the phases Half Coil Configuration 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 bal copper In setting the driver output current multiply the specified per phase or unipolar current rating by 1 4 to determine the peak output current PHASE JA PHASE Ho CONCH PHASE E PHASE B
15. w2 SW3 1 00A 0 71A on on on 1 46A 1 04A off on on 10 WS 2H542M Low Cote Microstepping Driver V1 0 1 91A 1 36A on off on 2 37A 1 69A off off on 2 84A 2 03A on on off 3 31A 2 36A off on off 3 76A 2 69A on off off 4 20A 3 00A off off off Remarks 1 Due to motor inductance the actual current in the coil may be smaller than the dynamic current settings particularly at higher speeds 2 Static current setting The current automatically reduced to 60 of dynamic current setting 1 second after the last pulse This will theoretically reduce motor heating to 36 due to I I of the original value If the application needs a different idle current please contact Leadshine for minor modification of circuit DIP setting 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 8 Protection Functions To improve reliability the driver incorporates a number of built in protections features a Over voltage protection When power supply voltage exceeds 50VDC 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 b Coil ground Short Circuit Protection Protection will be act
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WS 2H542M