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Features
Extra-low motor noise offers excellent quietness
Anti-Resonance, provides optimum torque and nulls mid-range
instability
Self-test and Auto-configuration technology, offers optimum
responses with different motors
Microstep resolutions programmable, from full-step to 102,400
steps/rev
Supply voltage up to +80 VDC
Output current programmable, from 0.5A to 7.0A
Pulse input frequency up to 200 KHz
Automatic idle-current reduction
Supports PUL/DIR and CW/CCW modes
The DM870 is a versatility fully digital stepping Drive based on a DSP with advanced control algorithm. It brings a unique level of system smoothness, providing optimum torque and nulls mid-range instability. The self-test and 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 on the markets. Its unique features make the DM870 an ideal solution for applications that require low-speed smoothness.
Electrical Specifications (Tj=
25oC/77oF)
|
Parameters
|
DM870
|
|
Min
|
Typical
|
Max
|
Unit
|
|
Output current
|
0.5
|
-
|
7.0 (5.0 RMS)
|
A
|
|
Supply voltage
|
+24
|
+48
|
+80
|
VDC
|
|
Logic signal current
|
7
|
10
|
16
|
mA
|
|
Pulse input frequency
|
0
|
-
|
200
|
kHz
|
|
Isolation resistance
|
500
|
-
|
-
|
Mohm
|
Connector P1 Configurations
|
Pin Function
|
Details
|
|
PUL+
|
Pulse signal: In single pulse (pulse/direction) mode, this input
represents pulse signal, each rising or falling edge active (software
configurable); 4-5V when PUL-HIGH, 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, pulse width should be longer than 2.5μs. Series
connect resistors for current-limiting when +12V or +24V used. The same as
DIR and ENA signals.
|
|
PUL-
|
|
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 5μs
at least. 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.
|
|
DIR-
|
|
ENA+
|
Enable signal: This signal is used for enabling/disabling the Drive. High
level (NPN control signal, PNP and Differential control signals are on the
contrary, namely Low level for enabling.) for enabling the Drive and low
level for disabling the Drive. Usually left UNCONNECTED (ENABLED).
|
|
ENA-
|
Connector P2 Configurations
|
Pin Function
|
Details
|
|
+Vdc
|
Power supply, 24~80 VDC, Including
voltage fluctuation and EMF voltage.
|
|
GND
|
Power Ground
|
|
A+, A-
|
Motor Phase A
|
|
B+, B-
|
Motor Phase B
|
Microstep resolutions and output current
are programmable, the former can be set from full-step to 102,400 steps/rev and
the latter can be set from 0.5A to 7.0A.
However, when it’s not in software configured mode, this Drive uses an 8-bit
DIP switch to set microstep resolution, and motor operating current, as shown
below:
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:
|
Microstep
|
Steps/rev.(for 1.8o motor)
|
SW5
|
SW6
|
SW7
|
SW8
|
|
1 to 512
|
Default/Software configured
|
on
|
on
|
on
|
on
|
|
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
|
Current Settings
When it’s not in software configured mode,
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.
|
Peak Current
|
RMS Current
|
SW1
|
SW2
|
SW3
|
|
Default/Software configured (0.5 to 7.0A)
|
off
|
off
|
off
|
|
2.6A
|
1.8A
|
on
|
off
|
off
|
|
3.4A
|
2.4A
|
off
|
on
|
off
|
|
4.0A
|
2.8A
|
on
|
on
|
off
|
|
4.8A
|
3.4A
|
off
|
off
|
on
|
|
5.4A
|
3.8A
|
on
|
off
|
on
|
|
6.1A
|
4.3A
|
off
|
on
|
on
|
|
7.0A
|
5.0A
|
on
|
on
|
on
|
Note: Due
to motor inductance, the actual current in the coil may be smaller than the
dynamic current setting, particularly under high speed condition.
