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sarasera

Heated bed - thumb screw problem.

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Posted · Heated bed - thumb screw problem.

One of the countersunk M3x20mm

screw together with the thumbscrew are so tight that it is imposible to tightend the thumbscrew without the countersunk M3x20mm also is turning around.

Therefore I have to use the screwdriver together with a tool to steady the thumbscrew when I want to tightend the thumbscrew. This is imposible when the glass is placed where it should be and therefore it is imposible to calibrate the bed.

I've tried to give the M3x20 som grease, and I even tried with another M3x20. But it still turns around when turning the thumb screw.

Its the one I've placed behind at the bed.

What to do?

 

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Posted · Heated bed - thumb screw problem.

The good news is that you pretty much never need to adjust that one, once you have the level set. Tighten it down until the terminal block is about 1-2 mm above the base plate, and then leave it set that way. When running the leveling wizard, the rear adjustments are always made using the wheel anyway.

 

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Posted · Heated bed - thumb screw problem.

I presume this is a UMO problem?

I suggest buying a new thumb nut, if it looks like that is the problem. Alternatively, you could get a tap and chase the threads.

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Posted · Heated bed - thumb screw problem.

Honestly sounds like you cross threaded it. When I was assembling I noted that it went a bit 'tight on first screwing, so I reversed and re tightened. It went with ease on all corners eventually.

 

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