M542C Full Digital Stepper Drive Manual V2.0
7
Microstep Steps/rev.(for 1.8°motor) SW5 SW6 SW7 SW8
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
5.2 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. Since parallel and serial connections of motor coils will significantly change resulting inductance
and resistance, it is therefore important to set drive output current depending on motor phase current, motor leads and
connection methods. Phase current rating supplied by motor manufacturer is important in selecting drive current,
however the selection also depends on leads and connections.
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.
5.2.1 Dynamic Current Setting
Peak Current RMS Current SW1 SW2 SW3
1.00A 0.71A ON ON ON
1.46A 1.04A OFF ON ON
1.91A 1.36A ON OFF ON
2.37A 1.69A OFF OFF ON
2.84A 2.03A ON ON OFF
3.31A 2.36A OFF ON OFF
3.76A 2.69A ON OFF OFF
4.20A 3.00A OFF OFF OFF
Notes: Due to motor inductance, the actual current in the coil may be smaller than the dynamic current setting,
particularly under high speed condition.
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