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MK3S MMU2s Upgrade - 1st Layer Troubleshoot  

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anniefish
(@anniefish)
New Member
MK3S MMU2s Upgrade - 1st Layer Troubleshoot

MMU2s feeds/loads great.

MK3 had worked great prior to upgrade.

Run calibration wizard, passes all tests(IR sensor test included), until first layer/zig zag print.

Extruder doesnt move at all, but still extrudes material creating a blob that grows bigger and bigger, making me have to make an emergency stop/reboot. No fail detected on printers end.

Havent been able to find any solutions. Similar thread says SOLVED, but there is no answer given.

Anyone else run into this issue? Any tips/solutions? Thanks for any assistance.

Posted : 13/02/2021 12:52 am
John L liked
John L
(@john-l)
Eminent Member
RE: MK3S MMU2s Upgrade - 1st Layer Troubleshoot

Huh. I'm came here to post that I'm having the exact same problem. I have no idea how to resolve it. Blob just grows at 0,0,0 until I reset the printer.

Posted : 14/02/2021 10:02 pm
John L
(@john-l)
Eminent Member
RE: MK3S MMU2s Upgrade - 1st Layer Troubleshoot

I had a look at https://forum.prusaprinters.org/forum/original-prusa-i3-mmu2s-mmu2-assembly-and-first-prints-troubleshooting/first-layer-calibration-stucked/ and it seemed my IR sensor in the MMU was off. Fixed that. Of course now...other issues 🙂

Posted : 14/02/2021 11:35 pm
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