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1. 1000 O ON ON OFF ON 1600 ON OFF OFF ON 2000 OFF OFF OFF ON 2400 ON ON ON OFF 4000 ON E ON OFF 5000 OFF OFF ON OFF 6000 ON ON OFF OFF 6400 OFF ON OFF OFF 8000 ON OFF OFF OFF 10000 OFF OFF OFF OFF A Leadshine Technology Co Ltd 8 Wiring Notes MD882 Microstepping Driver Manual V1 0 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 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 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 Controller VCC o PUL DIR l ENA DC Supply 24 to 80 VD2. fect acest est Sette el Ste stent Sith nite nee Sie ea es ed Eiht Electrical SPE Cli1C ATOMS is u5 ocdinspnsaciadeetoessGenhaaisdeehentneenhaehsaeeenkseenhecbaceeoasseenheabaceehoust Mechanical SpeCilicalions 2024s aarcanea aan Operating Environment and Other Specifications ccccccssssssssssesseeeseesesseeseees Elimination Of ICAL ieisiescos certs tees cert Scat stata adh Re aes tld te tebe ad ate tal 3 PA SSIOMIME NU aid CD ESCEUlO Macao ceinsehsisceienemcucaaehmneeiienamceciennisneienamcucenmhenetenemeccaunies Connector PC oni uration ox sect ores ieee eet a Siena Seo em een Selecting Active Edge or Active Level and Control Signal Mode eee Connector PA ContisuratOns 27st sito ainelicateae iets oa ac etc lecccateonntanc eeceane tes 4 Control Signal Connector P1 Interface ec eeeeeeeeseeeseseessssessesssssssssssssesseeaaes Ss onec iit OCS IOUT sec Steet eat are rene irre teen irre eek dees nec Greg ee deed estou eens Connections toded MOLOIS 3 tietlee eee tcelan ele iae teen ele tae ton tian clei aectoettann tes Connections to 6 lead Motors eccc ccccccie ce cccteecec Bie he ccteecec Sie de cctteecec Rik decteecaceeks Half Ot CO mi CALI GOIS osrin enan a N FuN Oil COM OULAIONS spinti tiai inia a ai a pis Connections to 8 lead Motors nnnnnnenenneeeeeeeerrrrerrrrrrrrerrrrrrrrrrrrrrrrrrrrrrrrrrrrrrreeens Series OME CUO INS sese n a T inidamensnacasioemadanensneead Paralel oOnnec tOn onnan a Gr Power DUPPly Selection
3. seriis E E AE E AE E AE A Regulated or Unregulated Power Supply yoecersr sninn e e E e RA NTU DIG DVE naan AT T Corrent SetHNE S garai nE E TE T EEN NTE E Byname Cunen SeN nanais a O E O Standstill C rrent Seting t c c0 4s2ecscedvsccasadstedeseduancesedsnedestuacenedeteduetencenedenedeta Microstep Resolution SClECHIONG 2ea27 ccduasecadenterncdduarrantenteennd enctenadenstenaddncteeadenceeale Contents SN MIN UG vtech ohinslaeastsb aston banca iota brats stab seston oh mateo castes ob ma sea asten obs eteobaetone 10 JDP Eal Onnee HO gcse ate aah rea nck tana tee aaa tact eee aa ae eae teen aac ae tant een aaa cele 10 10 Sequence Chart of Control Signals 2 0 0 ccccccccccccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeseeeeeeees 11 hh POLE CHOM FUNCIONS 4isia se tacaaae a ncasa a 1 Over voltare Proteco sine a ctc chen stata cet cde ceca E an cued ben crideden cence ds 11 Coil ground Short Circuit Protection neneneneeeeeeerererrrrrrrrrrrrrrrrrrrrrrrrrrrrrrerens 1 IZ RE GUCHELY Asked OQUCS HONS ects Sotto ln chert Seth canesheus E E eek seawncenees 12 Problem Symptoms and Possible Causes isinira E 12 II D Leadshine Technology Co Ltd 1 Introduction Features and Applications MD882 Microstepping Driver Manual V1 0 Introduction The MD882 is a high performance microstepping driver using pure sinusoidal current control technology It is particularly suitable for the applications desired with extremely low noise and low heati
4. C Figure 9 Typical connection 10 A Leadshine Technology Co Ltd 10 Sequence Chart of Control Signals MD882 Microstepping Driver Manual V1 0 In order to avoid some fault operations and deviations PUL DIR and ENA should abide by some rules shown as following diagram t gt 5us th E t a High Level gt 3 5V Pe COR eee i 1 3 i j I l 1 High Level gt 3 5V le Salen Low Level lt 0 5V tl DIR j tops es Low Level lt 0 5V I I j i ENA Figurel0 Sequence chart of control signals Notes 1 t ENA must be ahead of DIR by at least Sus Usually ENA and ENA are NC not connected See Connector P1 Configurations for more information 2 tz DIR must be ahead of PUL active edge by at least Sus to ensure correct direction 3 t3 Pulse width not less than 1 5 us 4 ty Low level width not less than 1 5 us 11 Protection Functions To improve reliability the driver incorporates some built in protections features Over voltage Protection When power supply voltage exceeds 94VDC protection will be activated and power indicator LED will turn red When power supply voltage is lower than 18VDC 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 powe
5. 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 y improve reliability function or design Leadshine does not assume any liability arising out of the User s Manual application or use of any product or circuit described herein neither does it convey any license under its patent rights of others For 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 VI D 8 8 2 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 Low Noise Microstepping Driver Version 1 0 2006 All Rights Reserved Attention Please read this manual carefully before using the driver Leadshine Technology Co Ltd 2006 by Leadshine Technology Company Limited All Rights Reserved Contents Table of Contents ls ntrod ction Features and Ap pCa ONS assado arn aaan OEO CERE eee Nia 5 016 Yc 6 9 EPAITE IE DE IEI I OIEI eae I I INE IENA EIE A I AT Features oari acne oleca beara one Sasa basen a atone enna sanaee ADDI CANONS Fess et ese ae eee Be eee eek ZEP CMC AO NG
6. connection methods Phase current rating supplied by motor manufacturer is important in selecting driver current however the selection also depends on leads and connections The first three bits SW1 2 3 of the DIP switch are used to set the dynamic current Select a setting closest to your motor s required current Dynamic Current Setting Peak current A RMS A Swi SW2 SW3 1 80 1 29 OFF OFF OFF 2 70 1 93 ON OFF OFF 3 60 2 57 OFF ON OFF 4 60 3 29 ON ON OFF 5 50 3 93 OFF OFF ON 6 40 4 57 ON OFF ON 7 30 5 27 OFF ON ON 8 20 5 86 ON ON ON Notes Due to motor inductance the actual current in the coil may be smaller than the dynamic current setting particularly under high speed condition A Leadshine Technology Co Ltd Standstill Current Setting MD882 Microstepping Driver Manual V1 0 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 be reduced to 60 of the selected dynamic current one 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 Microstep Resolution Selection Microstep resolution is set by SWS 6 7 8 of the DIP switch as shown in the following table 600 ON E ON ON
7. es pick place devices and etc It is specially adapted to extremely low noise low vibration and high precision equipments 2 Specifications Electrical Specifications T 25 C A Leadshine Technology Co Ltd Mechanical Specifications unit mm inch 25 4 mm MD882 Microstepping Driver Manual V1 0 143 Figure 1 Mechanical dimensions Recommend use side mounting for better heat dissipation Operating Environment and Other Specifications 40 RH 90 RH Environment Amb ient Temperature Humidit Vibration 10 C Max 5 9m s Max Approx 550 gram 19 5 oz Elimination of Heat Driver s reliable working temperature should be lt 65 C 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 decrease driver heating and motor heating Recommend use side mounting to maximize heatsink area Leadshine Technology Co Ltd MD882 Microstepping Driver Manual V1 0 3 Pin Assignment and Description The MD882 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 MD882 More detailed descriptions of the pins and related issues are presented in section 4 5 9 Connector P1 Configurations DIR signal In
8. here 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 A 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 A Leadshine Technology Co Ltd 6 Power Supply Selection MD882 Microstepping Driver Manual V1 0 The MD882 can match medium and small size stepping motors from Nema size 17 to 34 made by Leadshine or other motor manufactures around the world To achieve good driving performances 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 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 n
9. ng compared with microstepping drivers which apply pseudo sinusoidal current control technology Because pseudo sinusoidal current control technology may make the output current to be a distorted sine wave or generates larger current ripple and both of them may cause the motor working in a higher noise bigger vibration and higher temperature condition If the motor works in that condition for a long time that may decrease motor torque accelerate motor aging and short motor s operating life However the pseudo sine precise current control technology applied by the MD882 can solve above problems very well and therefore the MD882 can make stepping motors offer servo like performances Features Pure sinusoidal precise current control technology Pulse frequency up to 300 KHz Extremely low motor noise Automatic idle current reduction Both driver and motor are low heating 16 selectable resolutions High performance low cost Suitable for 2 phase and 4 phase motors Supply voltage up to 80VDC DIP switch current setting with 8 different values Peak current up to 8 2A 5 86A RMS Over voltage and short circuit protection Optically isolated differential inputs CW CCW and PUL DIR mode selectable Applications Suitable for a wide range of stepping motors from NEMA size 17 to 34 It can be used in various kinds of machines such as carving machines laser cutters laser phototypesetting systems plotting instruments NC machin
10. ngle ended inputs including open collector and PNP output The MD882 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 VCC R 0 if VCC 5V Lee eee 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 Controller vcc 9 Figure 3 Connection to PNP signal common cathode A Leadshine Technology Co Ltd 5 Connecting the Motor MD882 Microstepping Driver Manual V1 0 The MD882 driver can drive any 2 phase and 4 phase 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 output current P2 A A B B 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 use
11. oise 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 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 MD882 Selecting Supply Voltage The power MOSFETS inside the MD882 can actually ope
12. r supply leads correctly connected to the driver Otherwise the driver will be damaged instantly 11 A Leadshine Technology Co Ltd 12 Frequently Asked Questions MD882 Microstepping Driver Manual V1 0 In the event that your MD882 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 Problem Symptoms and Possible Causes Microstep resolution setting is wrong Fault condition exists The driver is disabled Motor phases may be connected in reverse DIP switch current setting is wrong Something wrong with motor coil ontrol signal is too weak 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 12
13. rate within 24V 80VDC 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 75V leaving room for power fluctuation and back EMF A on me Teo Loa MD882 Microstepping Driver Manual V1 0 7 Selecting Microstep Resolution and Driver Output Current The MD882 uses an 8 bit DIP switch to set microstep resolution and motor operating current as shown in the following figure Dynamic Current Microstep Resolution pm 1 2 3 4j5le 7 8 Standstill Current half full 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
14. s 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 A AW NC B B NC 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 D Leadshine Technology Co Ltd MD882 Microstepping Driver Manual V1 0 lower speeds is desired This configuration 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 P2 A 4 NC B B 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 w
15. single pulse mode this signal has low high voltage levels representing two directions of motor rotation in double pulse mode set by inside R31 amp R32 this signal 1s counter clock CCW pulse active at high level or low level set by inside R13 amp R14 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 Selecting Active Edge or Active Level and Control Signal Mode There are four resistances R13 R14 R31 R32 inside the MD882 specifically for selecting active edge or active level and control signal mode as shown in figure 2 Default setting is PUL DIR mode and upward rising edge active e132 of ek O ORE a A b R14 R32 open circuit a R13 R32 open circuit PUL DIR mode and active at upward rising edge PUL DIR mode and active at downward falling edge fole pefea e De 8 eos 8 eee c R13 R31 open circuit d R14 R31 open circuit CW CCW mode and active CW CCW mode and active at high level The fixed level at low level The fixed level Figure 2 R13 R14 R31 and R32 D Leadshine Technology Co Ltd Connector P2 Configurations MD882 Microstepping Driver Manual V1 0 otor Phase B 4 Control Signal Connector P1 Interface The MD882 can accept differential and si
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