DMA882S Digital Stepper Drive User Manual
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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 Therefore, the average current withdrawn from power supply is considerably less than motor current.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.
6.2 Power Supply Sharing
To avoid cross interference, connect each stepper drive directly to the shared power supply separately. To avoid cross
interference, DO NOT daisy-chain connect the power supply input pins of the Drivers. Instead connect them to power
supply separately.
6.3 Selecting Supply Voltage
The DM882S is designed to operate within20-80VDC voltage input. When selecting a power supply, besides voltage
from the power supply power line voltage fluctuation and back EMF voltage generated during motor deceleration
needs also to be taken into account. Please make sure leaving enough room for power line voltage fluctuation and
back-EMF voltage charge back.
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
drive damage. Therefore, it is suggested to choose only sufficiently high supply voltage for intended applications.
7. DIP Switch Configurations
This drive uses an 8-bit DIP switch to set microstep resolution, and motor operating current, as shown below:
7.1 Microstep Resolution Configurations
Microstep resolution is set by SW5, 6, 7, 8 of the DIP switches as shown in the following table:
Microstep
Steps/rev.(for 1.8°motor)
SW5
SW6
SW7
SW8
2
400
on
on
on
on
4
800
off
on
on
on
8
1600
on
off
on
on
16
3200
off
off
on
on
32
6400
on
on
off
on
64
12800
off
on
off
on
128
25600
on
off
off
on
256
51200
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
