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Slow warmup

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I have just noticed that in the past few days, when starting the print, the warmup takes ages.

Over the weekend I selected print and then went off for about 10 minutes, when I returned the progress bar had not moved and the bed was cold. I aborted the print and then tried again, this time it took a mater of minutes to start progressing.

This has happened three times now, one time the abort didn't see to do anything so I turned of the UM2. On restart all was normal. As far as I can tell there is no set pattern to this, in terms of what settings I use.

Wonder if anyone else has experienced this?



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Just as a first simple thing to check. Make sure the cables that go into the heated bed are securely held in place.


Hi thanks for the reply - nothing appears to be loose. The odd thing is that often a simple abort cures the problem.


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Several people had a cold solder joint where the 4 heated bed wires are soldered in. The joint can have a crack so tiny that you can't see it. I recommend heating up all 4 - or at least the 2 big wire ones.

See this first:


And this photo also:




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Update on the printer bed.

I took the bed apart and discovered that one of the retaining screws was a little loose, so it seems the action of me pressing the abort button and possibly moving the unit may have been the reason it appeared to solve the problem.

Tightening up all the screws has solved the problem.

Thanks as always for the great advice.


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