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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
The EM532MINI has 8-bit DIP Switch to configure output current, microstep resolution and idle current
SW1
7.1 Output Current Configuration
The EM532MINI has 8 output current settings which can be configured through DIP switch SW1, SW2 and SW3.
For a given stepper motor, as normal setting the output current to 1.4 times of motor phase current, will make it output
larger torque, but at the same time cause more heating for both the motor and drive. Therefore, it is suggested to set a
output current (peak of sinusoidal) to no more than 1.2 times the stepper motor's (for 4-lead motor) phase current to
prevent overheating .
Peak Current
0.4A
0.8A
1.2A
1.6A
2.0A
2.4A
2.7A
3.2A
7.2 Idle Current Configuration (SW4)
SW4 is used to set motor idle current percentage. At OFF position it means the standstill current is set to be 50% of the
selected output current. At ON position it means standstill current is set to be 90%.
7.3 Micro Step Configuration
Each EM532MINI has 16 micro step settings which can be configured through DIP switch SW5, SW6, SW7,SW8. See
the following table for detail.
Microstep
Steps/rev.(for 1.8°motor)
1
2
4
8
SW2
SW3
SW4
Output Current
Idle Current
(SW1-3)
RMS Current
0.29A
0.57A
0.86A
1.14A
1.43A
1.71A
1.93A
2.29A
(SW5-8)
200
400
800
1600
EM532MINI Digital Stepper Drive User Manual
SW5
SW6
SW7
Microstep
SW1
SW2
ON
ON
OFF
ON
ON
OFF
OFF
OFF
ON
ON
OFF
ON
ON
OFF
OFF
OFF
SW5
SW6
ON
ON
OFF
ON
ON
OFF
OFF
OFF
SW8
SW3
ON
ON
ON
ON
OFF
OFF
OFF
OFF
SW7
SW8
ON
ON
ON
ON
ON
ON
ON
ON
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