User Manual

TMCM-3314, TMCM-3315 Hardware Manual (V1.00 / 2018-APR-30) 23

6 Motor driver current

The stepper motor driver section of the TMCM-3314 + TMCM-3315 operates current controlled. The driver current

may be programmed in software with 236 effective scaling steps in hardware up-to 7A RMS / 9.6A peak max.

motor coil current.

Motor current measured for one phase with max. current settings (100% e.g. “SAP 6, 0, 255”) and 256 microsteps:

CH1 (yellow): motor current [100mV / A]

Motor current

setting in

software (TMC)

In TMCL axis parameter 6 (motor run current) and 7 (motor standby current) can be used

for motor current setting:

SAP 6, 0, <value> // set run current

SAP 7, 0, <value> // set standby current

For <value> numbers between 0 (minimum) and 235 (maximum) are supported. Motor

current is scaled linearly up-to 7A RMS / 9.6A peak.

(read-out value with GAP instead of SAP. Please see separate TMCM-3314 / TMCM-3315

firmware / software manual for further information)