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Motor looses steps


Possible causes :

  1. Stepper driver reference voltage set too low or too high
    - check if the stepper driver reference voltage is set to 0.55v

    0.425v, as stated in the manual, turns out to be giving too less power to the motors
    If the voltage is set too high (above 0.6V) the steppers may overheat and loose steps.
  2. Stepper driver overheating
    - check the reference voltage set and the temp of the driver
    If the voltage is set too high (above 0.6V) the steppers may overheat and loose steps.
    If the Voltage is correctly set (0.55V) and the driver still is hot, glue some small heatsink on the chip and think about a fan ventilated case for the controller board.
  3. Belts too tight or axis not running free / Extruder gear too tight
    - check if the belts are too tight
    This may choke the motor and make it loose steps
    The belts should be bendable with light finger force.

    - check if the affected axis is moving freely along the whole way
    If the axes don't run free, the motor needs too much force to move and looses steps.

    -In case of the extruder, check if the gear is not set too tight.
    If the gear is set too tight, the motor needs too much force to turn and looses steps.
    (most times you can hear a clicking noise from the motor/gear in that case)


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