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Weird Layer Shift on Prusa GCODE SSD  

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nick.b16
(@nick-b16)
Eminent Member
Weird Layer Shift on Prusa GCODE SSD

Hi fellow printaholics,

I was wondering if you can cast your eye on the pictures below. I recently changed out my E3D hotend and used the Nefertiti GCODE that comes on the SSD card from Prusa. Every thing was going well until I saw the head area had a weird layershift, only very slightly and was moving diagonally? I've seen layer shifts but they are more pronounced and obvious. this is moving up the z axis, i think?

I've added a picture and I will add some more to show what i saw.

Prusa MK3 upgraded to Prusa MK3s

OctoPrint on a Raspberry Pi 3B with OctoDash

This topic was modified 1 year ago by nick.b16
Posted : 19/10/2020 9:14 am
nick.b16
(@nick-b16)
Eminent Member
Topic starter answered:
RE: Weird Layer Shift on Prusa GCODE SSD

Posted : 19/10/2020 9:16 am
Same Old Shane
(@same-old-shane)
Admin
RE: Weird Layer Shift on Prusa GCODE SSD

I would try and run it again but this time without octoprint plugged in to determine if it is a printer or a raspberry pi issue.

If it does it again, I would try writing down your live Z settings, and any other custom settings you might have, then reflash your firmware and do a factory reset to clear the board and try again.

It is a bit odd with that type of shift, but Iwould try those steps first to try and eliminate the causes.

Shane (AKA FromPrusa)...
Posted : 19/10/2020 11:58 am
Neophyl
(@neophyl)
Famed Member
RE: Weird Layer Shift on Prusa GCODE SSD

Id also double check physical things like pulley tightness etc to rule out the mechanicals.

Posted : 19/10/2020 12:04 pm
bobstro liked
nick.b16
(@nick-b16)
Eminent Member
Topic starter answered:
RE: Weird Layer Shift on Prusa GCODE SSD

@fromprusa

thanks for the suggestions, i'll use the SD image and disconnect the PI and report back what i get. I havecompleted a visual and mechanical check as well as running testing samples, i.e the famous Benchy (with OctoDash)  and it came out great.

This post was modified 1 year ago by nick.b16
Posted : 19/10/2020 2:28 pm
nick.b16
(@nick-b16)
Eminent Member
Topic starter answered:
RE: Weird Layer Shift on Prusa GCODE SSD

It looks like the Octopi was the problem, I turned it off and disconnected it from the printer and then ran the Nefertiti gcode which was on the SD card. this printed out great and no layer shift this time.

Not sure why Octopi caused the problem. Any thoughts?

 

Posted : 20/10/2020 5:37 pm
Neophyl
(@neophyl)
Famed Member
RE: Weird Layer Shift on Prusa GCODE SSD

Quite often it’s any add on modules that cause issues. Disable them and then add them back one at a time doing prints in between to narrow down which one(s) are causing the issue. 

Posted : 20/10/2020 5:55 pm
fuchsr
(@fuchsr)
Noble Member
RE: Weird Layer Shift on Prusa GCODE SSD

The other day I had similar layer shifts on my M3S, using a Raspi with Astroprint. I printed the same model three times, every time a layer shift but in different locations. I finally put the gcode on an SD card and printed from there -- no problems at all. One of the Great Mysteries of 3D printing, I guess...

Posted : 20/10/2020 6:41 pm
bobstro
(@bobstro)
Illustrious Member
RE: Weird Layer Shift on Prusa GCODE SSD

If using OctoPrint, try running in safe mode if you experience layer shifts. If this helps, selectively enable plugins to try to figure out which is causing problems.

Are you by any chance running firmware v3.8.1? It had a bug that could cause these sorts of layer shifts with OctoPrint.

My notes and disclaimers on 3D printing and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan...
Posted : 20/10/2020 7:14 pm
nick.b16
(@nick-b16)
Eminent Member
Topic starter answered:
RE: Weird Layer Shift on Prusa GCODE SSD

@bobstro

Hi bobstro, Im am using the latest firmware on my MK3S and latest Octoprint and latest OctoDash and all plugins and a Raspberry Pi 3B with a Adafruit TFT

I'll give it a try and  use safe mode and see if this works. Thanks for everyone who replied and your suggestions

Posted : 20/10/2020 7:56 pm
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