Related Manuals for Motion DMD870
Summary of Contents for Motion DMD870
- Page 1 User’s Manual For DMD870 Digital Stepper Drive V2.0-20180926 (March 2018) Motion Control Products Ltd. Innovative products for Automation Industry Tel.: (+44) 01202 599922...
- Page 2 Motion Control Product’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.
- Page 3 DMD870 Digital Stepper Drive User’s Manual HEALTH AND SAFETY Read this manual carefully before trying to install the stepper drive into your system. The person setup the stepper drive should have a better understanding on electronics and mechanics. Contact us if there is any Notice question about the products or this manual.
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Page 4: Table Of Contents
DMD870 Digital Stepper Drive User’s Manual Contents 1. INTRODUCTION, FEATURES AND APPLICATIONS ............1 Introduction ......................1 Features ......................1 Applications ......................2 2. SPECIFICATIONS ......................2 Electronic Specification Tj = 25℃/77℉ .............. 2 Operating Environment ..................2 Outline Dimensions (unit: mm [inch]) ..............3 Elimination of Heat ..................... - Page 5 DMD870 Digital Stepper Drive User’s Manual 7. MICROSTEP RESOLUTION & DRIVE OUTPUT CURRENT..........10 Microstep Resolution Selection ................11 Current Settings ....................12 Dynamic current setting ................12 Standstill current setting ................13 8. WIRING NOTES ......................13 9. TYPICAL CONNECTION ..................... 14 10. SEQUENCE CHART OF CONTROL SIGNALS .............. 15 11.
- Page 6 DMD870 Digital Stepper Drive User’s Manual Procedure for Achieving Optimum Performance ......... 27 Err_check ...................... 28 About ......................29 APPENDIX ........................30 Twelve Month Limited Warranty ..............30 Exclusions ......................30 Shipping Failed Product & Obtaining Warranty Service ........30 Warranty Limitations ..................
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Page 7: Introduction, Features And Applications
Compared to the DMD432 (DM432C), broader input voltage and output current ranges make DMD870 being able to drive much more motors from size NEMA 17 to NEMA 34. What’s more, thanks to its higher performance DSP, driven motors can achieve much higher speed (above 3000RPM), offering servo-like performances. -
Page 8: Applications
It can be used in various kinds of machines, such as laser cutters, laser markers, high precision X-Y tables, labeling machines and so on. Its unique features make the DMD870 an ideal solution for applications that require both low-speed smoothness and high speed performances. -
Page 9: Outline Dimensions (Unit: Mm [Inch])
DMD870 Digital Stepper Drive User’s Manual Outline Dimensions (unit: mm [inch]) Elimination of Heat Drive’s reliable working temperature (heat sink) should be <70 ° C (158 °F ), and motor working temperature (surface) should be <80°C (176°F); It is recommended to use automatic idle-current mode, namely current automatically reduce to 60% when motor stops, so as to reduce driver heating and motor heating;... -
Page 10: Connectors And Pin Assignment
3. CONNECTORS AND PIN ASSIGNMENT DMD870 stepper drive 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. More detailed descriptions of the pins and related issues are presented in section 4, 5, 9. -
Page 11: Selecting Active Pulse Edge And Control Signal Mode
DIR-LOW. Please note that rotation direction is also related to motor-Drive wiring match. Exchanging the connection of two wires for a coil to the Drive will reverse motion direction. Enable signal: This signal is used for enabling/disabling the drive. High level for... -
Page 12: Control Signal Connector (P1) Interface
DMD870 Digital Stepper Drive User’s Manual 4. CONTROL SIGNAL CONNECTOR (P1) INTERFACE DMD870 stepper drive accepts differential and single-ended inputs (including open- collector and PNP output). It has 3 optically isolated logic inputs, which are located on connector P1 to accept line Drive control signals. These inputs are isolated to minimize or eliminate electrical noises coupled onto the drive control signals. -
Page 13: Connecting The Motor
DMD870 Digital Stepper Drive User’s Manual 5. CONNECTING THE MOTOR The DMD870 can drive any 2-pahse and 4-pahse hybrid stepping motors. 4-lead Motors Connections 4 lead motors are the least flexible but easiest to wire. Speed and torque will depend on winding inductance. -
Page 14: Full Coil Configurations
DMD870 Digital Stepper Drive User’s Manual 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 motors should be run at only 70% of their rated current to prevent overheating. -
Page 15: Power Supply Connection
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. -
Page 16: Multiple Drives
Drives. Instead, please connect them to power supply separately. Selecting Supply Voltage The power MOSFETS inside the DMD870 can actually operate within +24 ~ +80VDC, including power input fluctuation and back EMF voltage generated by motor coils during motor shaft deceleration. -
Page 17: Microstep Resolution Selection
DMD870 Digital Stepper Drive User’s Manual Microstep Resolution Selection When it’s not in software configured mode, microstep resolution is set by SW5, 6, 7, 8 of the DIP switch as shown in the following table: Steps/rev. Microstep (for 1.8°motor) Default/Software... -
Page 18: Current Settings
DMD870 Digital Stepper Drive User’s Manual Current Settings For a given motor, higher Drive current will make the motor to output more torque, but at the same time causes more heating in the motor and Drive. Therefore, output current is generally set to be such that the motor will not overheat for long time operation. -
Page 19: Standstill Current Setting
DMD870 Digital Stepper Drive User’s Manual Standstill current setting SW4 is used for this purpose. OFF means that the standstill current is set to be half of the selected dynamic current, and ON means that standstill current is set to be the same as the selected dynamic current. -
Page 20: Typical Connection
DMD870 Digital Stepper Drive User’s Manual 9. TYPICAL CONNECTION A complete stepping system should include stepping motor, stepping Drive, power supply and controller (pulse generator). A typical connection is shown as figure 8. DRIVE Figure 8: Typical connection Motion Control Products Ltd. -
Page 21: Sequence Chart Of Control Signals
DMD870 Digital Stepper Drive User’s Manual 10. SEQUENCE CHART OF CONTROL SIGNALS In order to avoid some fault operations and deviations, PUL, DIR and ENA should abide by some rules, shown as following diagram: Figure 9: Sequence chart of control signals Remark: t1: ENA must be ahead of DIR by at least 5μs. -
Page 22: Protection Fuctions
DMD870 Digital Stepper Drive User’s Manual 11. PROTECTION FUCTIONS To improve reliability, the DMD870 stepper drive incorporates some built-in protection functions. It uses one RED LED to indicate what protection has been activated. The periodic time of RED is 3 s (seconds), and how many times the RED turns on indicates what protection has been activated. -
Page 23: Protection Indications
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 mistakes in wiring. -
Page 24: Problem Symptoms And Possible Causes
DMD870 Digital Stepper Drive User’s Manual Problem Symptoms and Possible Causes Symptoms Possible Problems No power Microstep resolution setting is wrong Motor is not rotating DIP switch current setting is wrong Fault condition exists The drive is disabled Motor rotates in the... -
Page 25: Tuning Software - Protuner
This section will provide an overview of connection and basic setup instructions for our digital stepping Drive DMD870 using the ProTuner software. These instructions will take you through the following steps on how to set up your DMD870 stepper drive and the motor with the software called ProTuner. -
Page 26: Rs232 Interface Connection
DMD870 Digital Stepper Drive User’s Manual RS232 Interface Connection DM870 DMD870 Figure 10: RS232 interface connection RS232 Communication Connector Signal Description Not connected leave it unconnected when connect to a PC serial port +5V power only for STU RS232 transmit... -
Page 27: Testing The Stepper System
User’s Manual Testing the Stepper System Turn on the power supply, the green (Power) LED will light. The DMD870 has default parameters stored in the Drive. If the system has no hardware and wirings problem, the motor should be locked and the Drive should be ready. -
Page 28: Tuning
DMD870 Digital Stepper Drive User’s Manual Serial Port: Select the serial communication port to which the Drive is connected. The factory default setting is COM1. Baud Rate: Select the communication baud rate. The factory default setting is 38400. Click Open button to establish a connection with the specified settings. When connecting, you can choose SaveToDrive to download the current parameter settings to the Drive, or to upload the stored Drive settings into the ProTuner by clicking Tuning >... - Page 29 DMD870 Digital Stepper Drive User’s Manual Ki: Integral Gain. Integral Gain helps the Drive to overcome static current errors. A low or zero value for the Integral Gain may have current errors at rest. Increasing the Integral Gain can reduce the error. If the Integral Gain is too large, the systems may “hunt” (oscillate) about the desired position.
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Page 30: Systemconfig
However, if the user does not want to tune the current loop after changing a different stepping motor, then Motor auto-identification and parameter auto-configuration technology of the DMD870 can replace manually tuning the drive with ProTuner. Just change SW4 two times in 1 second, and then the drive will auto-identify the new motor and auto-configure related control parameters for optimum responses. -
Page 31: Anti-Resonance Introduction
- thereby wasting performance. Furthermore, at mid-range velocities, the resonance can become so severe that the motor loses synchronisation and stalls. The DMD870 drive provides robust anti-resonance control to stop the vibrations and maintain equilibrium. This feature requires that the drive be configured with respect to the total inertia in the system. - Page 32 The stop time between each cycle, unit is millisecond. Repeat edit box: Total motion cycles. Length edit box: Move distance of each cycle, unit is revolution. Start/Stop button: The user can Start/Stop a motion test by clicking this button. Motion Control Products Ltd. P a g e | 26 Tel.: (+44) 01202 599922...
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Page 33: Procedure For Achieving Optimum Performance
User’s Manual Procedure for Achieving Optimum Performance Step 1: Start the motion test by clicking Start/Stop button. Find a resonance speed by slightly moving the slider bar of internal pulse generator back and forth. See Figure 16. Figure 16: Anti-resonance tuning Step 2: Run the motor at the resonance speed and verify the motor smoothness. -
Page 34: Err_Check
DMD870 Digital Stepper Drive User’s Manual and Phase(s) values may be a little different between running the tests with an unloaded motor and a load motor. Please remember to click SavetoDrive to download the final parameter settings to the Drive when finish tuning. -
Page 35: About
DMD870 Digital Stepper Drive User’s Manual Figure 18: Error check window OverCurrent: Over-current Protection. Protection will be activated when continuous current exceeds 16A. OverVoltage: Over-voltage Protection. When power supply voltage exceeds 91±1 VDC, protection will be activated. PhaseErr: Phase Error Protection. Motor power lines wrong & not connected will activate this protection. -
Page 36: Appendix
Motion Control Products Ltd. warrants its products against defects in materials and workmanship for a period of 12 months from the shipping date. During the warranty period, Motion Control Products will either, at its option, repair or replace products which are proved to be defective.