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Either the motor is not connected well to the z screw or the motor is not as strong as it should be or the bed is more stuck than it should be.
First check for smooth travel. With power off slide the bed up and down - grip it near the back with both hands. It should be able to go up without lifting the UM2 off the table much. Make sure it doesn't hit the spool holder which passes through the back wall and can sometimes hit the bed.
Maybe send us a video of the issue. Some newer PCBs that come with the printer had a problem with the Z extruder. They lowered the current for that extruder I believe and that makes it less likely to overheat and it works better that way.
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Either the motor is not connected well to the z screw or the motor is not as strong as it should be or the bed is more stuck than it should be.
First check for smooth travel. With power off slide the bed up and down - grip it near the back with both hands. It should be able to go up without lifting the UM2 off the table much. Make sure it doesn't hit the spool holder which passes through the back wall and can sometimes hit the bed.
Maybe send us a video of the issue. Some newer PCBs that come with the printer had a problem with the Z extruder. They lowered the current for that extruder I believe and that makes it less likely to overheat and it works better that way.
Link to post
Share on other sites