3DM683 Digital Stepping Driver Manual V1.0
Tel: +086 0755-26434369 7 Web Site: www.leadshine.com
microstep resolution, and motor operating current, as shown below:
Microstep Resolution Selection
When it
’
s not in software configured mode, microstep resolution is set by SW5, 6, 7, 8 of the DIP
switch
as shown in the following table:
Steps/rev.(for 1.2
°
motor)
SW5
SW6
SW7
SW8
Default/Software configured,
（
From 200 to 102,400
）
ON
ON
ON
ON
400
OFF
ON
ON
ON
800
ON
OFF
ON
ON
1600
OFF
OFF
ON
ON
3200
ON
ON
OFF
ON
6400
OFF
ON
OFF
ON
12800
ON
OFF
OFF
ON
25600
OFF
OFF
OFF
ON
1000
ON
ON
ON
OFF
2000
OFF
ON
ON
OFF
4000
ON
OFF
ON
OFF
5000
OFF
OFF
ON
OFF
8000
ON
ON
OFF
OFF
10000
OFF
ON
OFF
OFF
20000
ON
OFF
OFF
OFF
25000
OFF
OFF
OFF
OFF
3DM683 Digital Stepping Driver Manual V1.0
Tel: +086 0755-26434369 8 Web Site: www.leadshine.com
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.
When it
’
s not in software configured mode, 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.
Dynamic current setting
Peak Current
RMS Current
SW1
SW2
SW3
Default/Software configured (0.5 to 8.3A)
OFF
OFF
OFF
3.2A
2.3A
ON
OFF
OFF
4.0A
2.9A
OFF
ON
OFF
4.9A
3.5A
ON
ON
OFF
5.7A
4.1A
OFF
OFF
ON
6.4A
4.6A
ON
OFF
ON
7.3A
5.2A
OFF
ON
ON
8.3A
5.9A
ON
ON
ON
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=I
2
*R) of the original value. If
