Printer stops and burns plastic. Bug

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cj7hawk
Posts: 103
加入:Tue Dec 25, 2012 7:52 am
Printer stops and burns plastic. Bug

Postbycj7hawk»Fri Nov 23, 2018 3:07 pm

I've noticed that, while printing, the printer often stops and pauses, maybe 10 to 15 seconds, then continues, however the place where it pauses, the head is hot enough to leave burn marks on white ABS.

Is this pause a bug in the firmware or somewhere else? I've noticed it probably happens about once every few hours or so.

David
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TiertimeBrook
Posts: 101
加入:Tue Oct 16, 2018 8:25 am

Re: Printer stops and burns plastic. Bug

PostbyTiertimeBrook»Mon Nov 26, 2018 1:34 am

Hi David,

This issue usually happened due to the low nozzle temperature ,and then the printing will pause and at the same time, nozzle will heat up automatically and after reached to the printing required temperature then the printing will continue,the nozzle temperature become lower sometimes is because of the low surrounding temperature or the uneven power distribution.
This is not regarded as a BUG, but we indeed need working on it to optimize .

Best Regards

Brook
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cj7hawk
Posts: 103
加入:Tue Dec 25, 2012 7:52 am

Re: Printer stops and burns plastic. Bug

Postbycj7hawk»Thu Dec 13, 2018 8:03 am

Hi Brook,

I see, that makes sense. I only found it a problem on white ABS so far, and it isn't visible in black. I guess I'd prefer it to work that way in general though. I think it also makes some sections stick harder to raft, which is a bit of a problem too.

If it's caused by temporary heat loss in the print head, couldn't you slow the print down a little for a short period of time - eg,

If H=head temp and T=desired temp
If H>=T - Run at preprogrammed speed.
If H=T-1, run 5% slower.
If H=T-2, run 10% slower.
If H=T-3, run 20% slower.
If H=T-4, run 40% slower.
If H=T-5, wait for head to heat up.

Something like that kind of algorithm would likely fix it?

David
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