Filament skip in the beginning of each layer. Help

[AnotherGuyver]

Hi guys,

so up until today my P1P was printing perfectly. No trouble whatsoever. But starting today, I have a very weird thing happening on every print, essentially rendering each print useless.

When I start printing and after the bed leveling is done, the printer prints a line (as always). However, the beginning of the line is skipped. It continues over to the first position, leaving a trail of filament along the way. As soon as it goes down to print, I get a bubble, then it starts moving and I get nothing. After about 2cm, it starts drawing a line again. As it goes back to the beginning of the next line, same thing is happening. I am a beginner and don’t know how to troubleshoot this. Does anybody know, what is happening?

Thanks!

Edit: Thought, it may be a temperature problem. Checked with PETG print at 250°, same problem, if not worse. (Last picture)

Edit 2: I also realised, that the fan in front on the hot end (hot end fan?) is not spinning at all.

Kind regards

[AnotherGuyver]

Ok, FIXED IT.

For refererence:

Is there a way to rollback the P1P firmware update?

I updated the firmware and now all my prints are having issues. Stringing, extrusion gaps, you name it. I even reran a print job that I ran before the update and it is now failing. I just want to rollback the firmware. I’ve learned my lesson about being an early adopter.

And this was my value:

Moved it back to K0.020 and it started working again.

As for the fan, apparently I didn’t wait long enough before cancelling the print for the fan to turn on. Working like a charm now. So beware of this strange K value.