Stepper Motor Operation - Galil Motion Control DMC-21 5 Series User Manual

Stepper Motor Operation

To configure an axis for a bipolar stepper motor, set
Setting Amplifier Gain and Step Resolution
The amplifier gain and the step resolution of the SDM-20242 are set via jumpers.
Amplifier Gain Setting:
The SDM-20242 has four amplifier gain (current) settings. The amplifier gain for each axis is set based on its
corresponding jumper: JPX1, JPY1, JPZ1, JPW1.
Step Resolution Setting:
The step resolution of all axes of the SDM-20242 is set via JP1.
Low Current Mode
By default, 100% of the current will be delivered to the motor while the axis is holding position. An axis can be
configured for Low Current mode so 25% of the current will be sent to the motor while holding position. Low
Current mode can also be configured lower the current to 0% while holding position.
A4 – SDM-20242 ▫ 172
JPm1
0.5 A
0.75 A
1.0 A
1.4 A
Table A4.4: Amplifier Gain Settings
Step Resolution
Full Step
Half Step
Quarter Step
1/16 Step
Table A4.5: Step Resolution Settings
LC Command JP1 Setting
n = 0 LC Jumper On or Off
n = 1 LC Jumper On
n = 1 LC Jumper Off
Table A4.6: Low Current Mode Configurations
to -2 for that axis.
MT
Gain Value
0.5 A/Phase
0.75 A/Phase
1.0 A/Phase
1.4 A/Phase
JP1 Setting
No Jumper
M1 only
M2 only
M1 and M2
Description
100% holding current
25% holding current
0% holding current
DMC-21x5 User Manual 1.0a1