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Firmware update 3.7.1 broke filament loading #1873

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bcl opened this issue May 26, 2019 · 3 comments

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commented May 26, 2019

I have a Prusa MK3S which has been working flawlessly since I built it last December, running Firmware 3.5.2

  • Updated to 3.7.1
  • Ran 1st layer test which worked fine, but it left the head low instead of raising it, which makes it hard to remove the plate without going into the z-axis adjust in settings.
  • Ran a z-axis calibration, which failed. Not sure why.
  • Ran the find home test and it worked fine, and was at the right Z
  • pre-heated the bed and nozzle, had to raise it to grab the extra filament that always seems to drip out.
  • Started a print of https://www.thingiverse.com/thing:2947391sliced by Prusa Slicer 2.0.0 (first time I've used the new version of the slicer)
  • It immediately prompted to remove the filament,which wouldn't come out all the way.
  • Futzed around and opened the access to the extruder. Filament was stuck, had a blob on the end (first time this has ever happened). Cleared it and removed the filament.
  • Tried to re-load, it prompted me, inserted filament. No beep, no extruder movement.
  • Moved extruder manually in the settings menu, works fine.
  • Downgraded to 3.5.2 and it is printing just fine (after telling me there is a firmware update)
@JohnOCFII

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commented May 26, 2019

The MK3S wasn't introduced until February of this year. Perhaps you downloaded the MK3S firmware, when you really wanted the MK3 firmware. They are different. (Ask me how I know... -- but I caught my mistake before I started a print).

https://www.prusa3d.com/drivers/. (just scroll down a bit for the MK3 firmware)

@bcl

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commented May 26, 2019

Ooooh. I had no idea there was a new model. Been too busy printing. Interesting that the flash utility didn't catch that and warn me. I'll give that a try after my current print finishes. Thanks!

@bcl

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commented May 27, 2019

That was the problem, thanks for pointing that out!

@bcl bcl closed this May 27, 2019

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