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supply only during the ON duration of the PWM cycle, but not during the OFF duration. Therefore, the
average current withdrawn from power supply is considerably less than motor current. For example, two 3A
motors can be well supplied by one power supply of 4A rating.
4.2 Power Supply Sharing
Multiple CL57T drivers can share one power supply to reduce cost, if that power supply has enough power
capacity. To avoid cross interference, connect each stepper drive directly to the shared power supply
separately. To avoid cross interference, DO NOT daisy-chain connect the power supply input pins of the
Drivers. Instead connect them to power supply separately.
4.3 Selecting Supply Voltage
The CL57T is designed to operate within +24 - +48VDC voltage input. When selecting a power supply,
besides voltage from the power supply power line voltage fluctuation and back EMF voltage generated
during motor deceleration needs also to be taken into account. Ideally it is suggested to use a power supply
with the output of +36VDC, leaving room for power line voltage fluctuation and back -EMF.
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 driver damage. Therefore, it is suggested to choose only sufficiently high
supply voltage for intended applications.
5. DIP Switch Configurations
This drive uses an 8-bit DIP switch to set microstep resolution, motor direction, auto tuning switch and so on.
5.1 Microstep Resolution(SW1-SW4)
Microstep resolution is set by SW1, 2, 3, 4 of the DIP switches as shown in the following table:
Steps/Revolution
Software Configured (Default 1600)
800
1600
3200
6400
12800
25600
51200
1000
CL57T(V3.0) Closed-loop Stepper Driver
SW1
SW2
on
on
off
on
on
off
off
off
on
on
off
on
on
off
off
off
on
on
6
SW3
SW4
on
on
on
on
on
on
on
on
off
on
off
on
off
on
off
on
on
off
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