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1. Introduction, Features and Applications
Introduction
The DM856 is a versatility fully digital stepping driver based on a DSP with advanced control
algorithm. The DM856 is the next generation of digital stepping motor 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 drivers in the markets. Its unique features make the
DM856 an ideal solution for applications that require low-speed smoothness.
Compared to the DM432C, broader input voltage and output current ranges make the DM856 can
drive much more motors than the DM432C. What's more, owing to its higher performance DSP,
driven motors can achieve much higher speed (above 3000RPM) than that of the DM432C,
offering servo-like performances. It can be regarded as an improved model origin from DM556,
while supports broader input voltage range.
Features
l Anti-Resonance, provides optimum torque
and nulls mid-range instability
l Motor auto-identification and parameter
auto-configuration
technology,
optimum responses with different motors
l Multi-Stepping allows a low resolution step
input to produce a higher microstep output
for smooth system performance
l Microstep resolutions programmable, from
full-step to 102,400 steps/rev
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 laser cutters, laser markers, high precision X-Y tables, labeling machines,
and so on. Its unique features make the DM856 an ideal solution for applications that require both
low-speed smoothness and high speed performances.
Tel: +086 0755-26434369
DM856 Microstepping Driver Manual V1.0
l Supply voltage up to +80 VDC
l Output current programmable, from 0.5A to
5.6A
l Pulse input frequency up to 200 KHz
offers
l TTL compatible and optically isolated input
l Automatic idle-current reduction
l Suitable for 2-phase and 4-phase motors
l Support PUL/DIR and CW/CCW modes
l Over-voltage,
over-current,
protections
1
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2. Specifications
Electrical Specifications (T
Parameters
Output current
Supply voltage
Logic signal current
Pulse input frequency
Isolation resistance
Mechanical Specifications (unit: mm [inch], 1 inch = 25.4 mm)
phase-error
Elimination of Heat
l
Driver's reliable working temperature should be <70 ℃ (158℉), and motor working temperature
should be <80 ℃ (176℉);
l
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;
l
It is recommended to mount the driver vertically to maximize heat sink area. Use forced cooling
method to cool the system if necessary.
Tel: +086 0755-26434369
DM856 Digital Stepping Driver Manual V1.0
= 25℃/77℉)
j
DM856
Min
Typical
Max
0.5
-
5.6 (4.0 RMS)
+20
-
+80
7
10
16
0
-
200
500
Figure 1: Mechanical specifications
2
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Unit
A
VDC
mA
kHz
MΩ
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