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LICHUAN MC860H - Wiring Notes

LICHUAN MC860H
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MC860H High Performance Digital Stepper Driver MC860H High Performance Digital Stepper Driver
13 14
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
ON
OFF
OFF
ON
128
25600
OFF
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
40
8000
ON
ON
OFF
OFF
50
10000
OFF
ON
OFF
OFF
100
20000
ON
OFF
OFF
OFF
200
40000
OFF
OFF
OFF
OFF
Current Settings
For a given motor, higher driver current will make the motor to output more torque, but
at the same time causes more heating in the motor and driver. 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 driver output current
depending on motor phase current, motor leads and connection methods. Phase current
rating supplied by motor manufacturer is important in selecting driver 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.
Peak Current
RMS Current
SW1
SW2
SW3
2.40A
2.00A
ON
ON
ON
3.08A
2.57A
OFF
ON
ON
3.77A
3.14A
ON
OFF
ON
4.45A
3.71A
OFF
OFF
ON
5.14A
4.28A
ON
ON
OFF
5.83A
4.86A
OFF
ON
OFF
6.52A
5.43A
ON
OFF
OFF
7.20A
6.00A
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.
Standstill current setting
SW4 is used for this purpose. OFF meaning that the standstill current is set to be half of
the selected dynamic current, and ON meaning that standstill current is set to be the
same as the selected dynamic current.
The current automatically reduced to 60% of the selected dynamic current one second
after the last pulse. Theoretically, this will reduce motor heating to 36% (due to P=I2*R)
of the original value. If the application needs a different standstill current, please contact
Lichuan.
8. Wiring Notes