Selecting Microstep Resolution And Drive Output Current; Microstep Resolution Selection; Current Settings - Leadshine Technology MA860C User Manual

 It is prohibited to pull and plug connector P2 while the drive is powered ON, because there is high current flowing
through motor coils (even when motor is at standstill). Pulling or plugging connector P2 with power on will cause
extremely high back-EMF voltage surge, which may damage the drive.

5 Selecting Microstep Resolution and drive Output Current

This drive uses an 8-bit DIP switch to set microstep resolution, and motor operating current, as shown below:

5.1 Microstep Resolution Selection

Microstep resolution is set by SW5, 6, 7, 8 of the DIP switch as shown in the following table:
Microstep Steps/rev.(for 1.8°motor)
2
4
8
16
32
64
128
256
5
10
20
25
40
50
100
200

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.
400
800
1600
3200
6400
12800
25600
51200
1000
2000
4000
5000
8000
10000
20000
40000
MA860C Full Digital Stepper Drive Manual V1.0
SW5 SW6
ON ON
OFF ON
ON OFF
OFF OFF
ON ON
OFF ON
ON OFF
OFF OFF
ON ON
OFF ON
ON OFF
OFF OFF
ON ON
OFF ON
ON OFF
OFF OFF
SW7 SW8
ON ON
ON ON
ON ON
ON ON
OFF ON
OFF ON
OFF ON
OFF OFF
ON OFF
ON
OFF
ON OFF
ON OFF
OFF OFF
OFF OFF
OFF OFF
OFF OFF