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marzvt

taller prints print tilted

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Was it X or Y axis that missed steps?

There are two main causes of missed steps. Loose pulley causes sudden shifts. Rubbing/friction causes gradual shifts like this. If it's a UM1 it's almost certainly the rubber belt rubbing against the wood frame - you can tell because it twists back and forth each time it changes direction. Fix by adding washers under the 4 black plastic spacers and possibly also taking the motor off and moving the pulley even closer to the motor (should be very close - about 1/2mm).

If UM2 it's also usually rubbing pulley or belt but usually right at the motor pulley. In that case the only solution I'm told is to move the pulley along the shaft closer to the motor.

 

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