Sure
Step
TM
Stepping Systems User Manual
3–13
Chapter 3:
Sure
Step
TM
STP-DRV-4035 Microstepping Drive
5th Ed., Rev. B 01/2019
Idle Current Reduction
Your drive is equipped with a feature that automatically reduces the motor current
by 50% anytime the motor is not moving. This reduces drive heating by about 50%
and lowers motor heating by 75%. This feature can be disabled if desired so that
full current is maintained at all times. This is useful when a high holding torque
is required. To minimize motor and drive heating we highly recommend that you
enable the idle current reduction feature unless your application strictly forbids it.
Idle current reduction is enabled by sliding switch #4 toward the
50% IDLE
label,
as shown in the sketch below. Sliding the switch away from the
50% IDLE
label
disables the reduction feature.
Self Test
The SureStep drive includes a self test feature. This is used for trouble shooting. If
you are unsure about the motor or signal connections to the drive, or if the SureStep
drive isn’t responding to your step pulses, you can turn on the self test.
To activate the self test, slide switch #1 toward the
TEST
label. The drive will slowly
rotate the motor, 1/2 revolution forward, then 1/2 rev backward. The pattern repeats
until you slide the switch away from the
TEST
label. The SureStep drive always uses
half step mode during the self test, no matter how you set switches 2 and 3. The self
test ignores the
STEP
and
DIRECTION
inputs while operating. The
ENABLE
input
continues to function normally.
50% IDLE
4
4
50% IDLE
Idle Current Reduction
Selected
No Current Reduction
(Factory Default)
TEST
1
1
TEST
Self Test ON
Self Test OFF
(Factory Default)
