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Model causes MK3 to go bonkers  

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bret.m2
(@bret-m2)
New Member
Model causes MK3 to go bonkers

tracks

My MK3 has been trouble-free so far, but this model is giving me fits.

I've tried tried printing it a few times. Each time, in the middle of the first layer, the printer stops and tells me to pull out the filament and reload it, and reloading doesn't go smoothly but eventually works. But when I try to print again the same problem occurs in the same spot.

This was before upgrading to firmware 3.7.2. After upgrading it's the same issue but worse. After reloading the filament, the print head starts drifting in the positive-X direction until it crashes against the side over and over until I hit reset. This is repeatable as well.

I rotated the model and re-sliced it to see if it would work around that problem. That's the attached file. Didn't help. Same behavior.

Any ideas?

Best Answer by --:

It's a filament sensor issue - do a search and you'll find a lot of posts and suggested solutions. Prusa even has a blog discussing how to resolve the problem.

Posted : 01/09/2019 8:05 pm
bret.m2
(@bret-m2)
New Member
Topic starter answered:
RE: Model causes MK3 to go bonkers

Sorry, I attached the STL. Here's the gcode.

tracks_0.2mm_PLA_MK3

Posted : 01/09/2019 8:33 pm
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(@)
Illustrious Member
RE: Model causes MK3 to go bonkers

It's a filament sensor issue - do a search and you'll find a lot of posts and suggested solutions. Prusa even has a blog discussing how to resolve the problem.

Posted : 01/09/2019 8:40 pm
bret.m2
(@bret-m2)
New Member
Topic starter answered:
RE: Model causes MK3 to go bonkers

Update: I tried printing a small model that I printed successfully recently. It made it through several layers but then stopped and told me to unload/reload filament. So it's not the model. Something has changed with the printer. I get same behavior with two different spools.

Posted : 01/09/2019 9:16 pm
bret.m2
(@bret-m2)
New Member
Topic starter answered:
RE: Model causes MK3 to go bonkers
Posted by: Tim

It's a filament sensor issue - do a search and you'll find a lot of posts and suggested solutions. Prusa even has a blog discussing how to resolve the problem.

Oh, okay! Thanks. I'll look that up.

Posted : 01/09/2019 9:17 pm
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(@)
Illustrious Member
RE: Model causes MK3 to go bonkers

I found the link: 

https://help.prusa3d.com/article/43mduc4zdn-filament-change-prompted-at-the-beginning-of-the-print

Posted : 01/09/2019 11:21 pm
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