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Shifting nozzle

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I just bought a UM2 and when a print a bigger design it always shifts 2 cms up at the same position.

I checked screws

Checked pully short belts

I upgraded firmware

Tried different speeds

It's brand new..



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Did you check the x/y motors pulley screws? Also check if there's any oil on any belt. Check the full 10 pulleys. The hard part it's to access the motor pulleys. I would call the seller just in case.

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