Configuring the Motor (STM17 / STM23 / STM24 / SWM24)

To configure the STM or SWM motor settings, click on the motor icon. You need to set the current. The rated current for the motor you've chosen appears in the "Running Current" box in the upper left and you'll normally want to use that value. If your application is particularly heat sensitive, and you have more torque than needed, you can reduce motor heating by lowering the current. The "Accel/Decel Current" setting is allowed only during acceleration and deceleration portions of the move, and is thus allowed to exceed the motor's ratings.

Idle current reduction automatically reduces motor heating by lowering the current when the motor is at rest. In most cases, the default value of 50% works well. Again, you can reduce motor heating further by lowering the idle current percentage.

It is also possible to adjust the idle current delay, which is the delay between the instant the motor stops moving and the actual reduction of the current. It's good to allow a little time for the motor to settle out after a move before going into idle reduction. The default setting of 0.40 seconds is generally sufficient for this purpose.

Load Inertia

The anti-resonance feature is most effective if you can precisely set the load inertia. If you know this value, click on the first option button, enter the inertia in the box and select the units (oz-in-sec2, g-cm2, etc) from the list. If you don't know the exact inertia of your load, but you want to try something and see how it works, choose the second option button and enter a load to motor inertia ratio in the box.