Motion DMD870 User Manual

Motion Control Products Ltd.

Innovative products for Automation Industry

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User’s Manual

For DMD870 Digital Stepper Drive

V2.0-20180926

(March 2018)

DMD870 Digital Stepper Drive User’s Manual

The contents in this manual have been carefully prepared and are believed to be accurate,
but no responsibility is assumed for inaccuracies.

Motion Control Products Limited reserves the right to make changes without further
notice to any products herein to improve reliability, function or design. Motion Control
Products Limited 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.

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. According to Motion Control Product’s terms and
conditions of sales, the user of Motion Control Product’s products in life support or

aircraft applications assumes all risks of such use and indemnifies Motion Control
Products Limited against all damages.

Copyright © 2015 Motion Control Products Ltd. All rights reserved.

Motion Control Products Ltd

11-15 Francis Avenue

Bournemouth, Dorset, UK BH11 8NX

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DMD870 Digital Stepper Drive User’s Manual

!

Notice

!

Caution

!

Warning

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
question about the products or this manual.

 Make sure the power supply voltage does not exceed the drive’s

input range. Double check the connections and make sure the
power lead polarity is correct.

 Disconnect the motor from the load if you are not sure the move

direction. Adjust the axis in the middle before trying to run the
motor.

 Do NOT set high current on small stepper motor as this may damage

the motor.

 Never disconnect the motor wires when the power is on.

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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 ............................................................................................. 3

3. CONNECTORS AND PIN ASSIGNMENT ........................................................................ 4

Connector P1 Configurations .............................................................................. 4

Selecting Active Pulse Edge and Control Signal Mode ....................................... 5

Connector P2 Configurations .............................................................................. 5

4. CONTROL SIGNAL CONNECTOR (P1) INTERFACE ........................................................ 6

5. CONNECTING THE MOTOR......................................................................................... 7

4-lead Motors Connections ................................................................................ 7

6-lead Motors Connections ................................................................................ 7

Half Coil Configurations .................................................................................. 7

Full Coil Configurations ................................................................................... 8

Connections to 8-lead Motors ........................................................................ 8

6. POWER SUPPLY CONNECTION ................................................................................... 9

Regulated or Unregulated Power Supply ........................................................... 9

Multiple Drives .................................................................................................. 10

Selecting Supply Voltage ................................................................................... 10

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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. PROTECTION FUCTIONS ......................................................................................... 16

Over-current Protection ....................................................................................16

Over-voltage Protection ....................................................................................16

Phase Error Protection ......................................................................................16

Protection Indications .......................................................................................17

12. FREQUENTLY ASKED QUESTIONS ........................................................................... 17

Problem Symptoms and Possible Causes ..........................................................18

13. TUNING SOFTWARE - PROTUNER ........................................................................... 19

Introduction ......................................................................................................19

Connections and Testing ...................................................................................19

RS232 Interface Connection ..........................................................................20

Testing the Stepper System ..........................................................................21

How to use the software ...................................................................................21

Option ...........................................................................................................21

Com Config Window .....................................................................................21

Tuning ............................................................................................................22

SystemConfig.................................................................................................24

Anti-Resonance Introduction ........................................................................25

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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 ........................................................................................ 30

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DMD870 Digital Stepper Drive User’s Manual

1. INTRODUCTION, FEATURES AND APPLICATIONS

Introduction

Motion Control Products Ltd (MCP)’s digital stepper drive DMD870 is a versatility fully
digital stepper drive based on a DSP with advanced control algorithm. The DMD870 is the
next generation of digital stepper controls. It brings a unique level of system smoothness,
providing optimum torque and nulls mid-range instability. Motor auto-identification and
parameter auto-configuration technology offers optimum responses with different motors
and easy-to-use. The driven motors can run with much smaller noise, lower heating,
smoother movement than most of the Drives in the markets. Its unique features make the
DMD870 an ideal solution for applications that require low-speed smoothness.

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. DMD870 stepper drive
is regarded as an improved model originally from DMD556, while supports broader input
voltage range.

Features

 Anti-Resonance, provides optimum torque and nulls mid-range instability
 Motor auto-identification and parameter auto-configuration technology, offers

optimum responses with different motors

 Multi-Stepping allows a low resolution step input to produce a higher microstep

output for smooth system performance

 Output current programmable, from 0.5A to 7.0A
 Pulse input frequency up to 200 KHz
 TTL compatible and optically isolated input
 Automatic idle-current reduction
 Suitable for 2-phase and 4-phase motors
 Support PUL/DIR and CW/CCW modes
 Over-voltage, over-current, phase-error protections

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DMD870 Digital Stepper Drive User’s Manual

Parameters

DMD870

Minimum

Typical

Maximum

Output current (A)

0.5

-

7.5 (5.0RMS)

Input voltage (VDC)

+ 24

+ 48

+72

Logic signal current (mA)

7

10

16

Pulse input frequency (kHz)

0 - 200

Isolation resistance (MΩ)

500 - -

Cooling

Natural Cooling or Forced cooling

Operating
Environment

Environment

Avoid dust, oil fog and corrosive gases

Ambient Temperature

0ºC－40ºC (32ºF－104ºF)

Humidity

40%RH－90%RH

Operating Temperature

70˚C (158˚F) Max

Vibration

5.9m/s2 Max

Storage
Temperature

-20ºC －65ºC (-4ºF －149ºF)

Weight

Approx. 280g (10 oz)

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.

2. SPECIFICATIONS

Electronic Specification Tj = 25℃/77℉

Operating Environment

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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

motor working temperature (surface) should be

 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;

 The drive must be mounted vertically to maximise heat sink area as shown in the

following picture. Use forced cooling method to cool the system if necessary

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<80°C (176°F);

C (158°F), and

°

DMD870 Digital Stepper Drive User’s Manual

Signal

Description

PUL+ / PUL-

Pulse signal: In single pulse (pulse/direction) mode, this input represents pulse
signal, each rising or falling active edge (software configurable); 4-5V when PUL­HIGH, 0-0.5V when PUL-LOW. In double pulse mode (pulse/pulse), this input
represents clockwise (CW) pulse, active both at high level and low level (software

configurable). For reliable response, the pulse width should be longer than 2.5μs.

Series connect resistors for current-limiting when +12V or +24V is used. The same
as DIR and ENA signals.

Important NOTE: The drive must be mounted vertically onto a plate or a heat

sinking to maximize heat sink area as shown in the above picture. Please use

additional heat sinking or cool fan if necessary.

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.

Connector P1 Configurations

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DIR+ / DIR-

DIR signal: In single-pulse mode, this signal has low/high voltage levels,
representing two directions of motor rotation; in double-pulse mode (software
configurable), this signal is counter-clock (CCW) pulse, active both at high level
and low level (software configurable). For reliable motion response, DIR signal
should be ahead of PUL signal by at least 5μs. 4-5V when DIR-HIGH, 0-0.5V when
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.

ENA+ / ENA-

Enable signal: This signal is used for enabling/disabling the drive. High level for
enabling drive (NPN control signal, PNP and Differential control signals are on the
contrary, namely Low level for enabling.) and low level for disabling drive. Usually
left UNCONNECTED (ENABLED).

Pin Function

Details

+Vdc

Power supply, 24~72 VDC, Including voltage fluctuation and EMF voltage.

GND

Power Ground.

A+, A-

Motor Phase A

B+, B-

Motor Phase B

Selecting Active Pulse Edge and Control Signal Mode

DMD870 stepper drive supports PUL/DIR and CW/CCW modes and pulse actives at rising or
falling edge. See more information about these settings in Section 13. Default setting is
PUL/DIR mode and rising edge active (NPN, and PNP control signal is on the contrary).

Connector P2 Configurations

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