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Z Axis drops after completing job

February 2, 2019, 3:58 pm

Symptoms
CNC machine Z Axis drops after completing job.

Relevant
Marlin 3D Printer Firmware running on Arduino Mega with RAMPS 1.4 shield. Controlled via Pronterface.

Procedure
The steppers motors will shut down DEFAULT_STEPPER_DEACTIVE_TIME seconds after the last move when DISABLE_INACTIVE_? is true. Individual axis can be disabled or DEFAULT_STEPPER_DEACTIVE_TIME can be set to zero to stop the axis from dropping.

  1. Open the firmware project
  2. Open file Configuration_adv.h
  3. Change the line from

    #define DEFAULT_STEPPER_DEACTIVE_TIME 120

    to

    #define DEFAULT_STEPPER_DEACTIVE_TIME 0
  4. Upload firmware project
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