Using a 24 V power supply I have two NEMA 17 stepper motors each driven by a DQ542MA stepper motor driver. I have the current settings on the driver set for a RMS of 1.69 and a pulse/rev of 400. When I run the motors they run extremely well but become extremely hot. I need help to figure out what would be the proper settings to use in order to stop the overheating.

Attached is a photo of the motor's setting tables:

Driver with current and REV tables


It is completely normal for a stepper motor to get hot. Taking this datasheet for example, specifies a 80 °C temperature rise. That is, in an room that is 25 °C ambient temperature, the motors would get up to 105 °C.

To prevent the motors from getting as hot you could further reduce the operating current, but likely the temperature they're running at is normal.

  • $\begingroup$ and add a cooler as well :) $\endgroup$ – profesor79 Jun 21 '18 at 8:36
  • $\begingroup$ @profesor79 That should not be necessary. Steppers are designed to run without active cooling. $\endgroup$ – Tom van der Zanden Jun 21 '18 at 8:42
  • $\begingroup$ agree. I just don't like to get burnt when touching stuff $\endgroup$ – profesor79 Jun 21 '18 at 8:50

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