vladimiro.c
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shifting on same layer

Thu Mar 01, 2018 7:03 pm

Hi everyone,

I've just received a new MK3 with steel bed sheet. I had several problems about first layer sticking and I was able to solve them definetely only putting a vertex sheet on steel sheet. Anyway the biggest problem is this layer shifting showed in photo. It seems it's always the same layer every object I print. I've checked all screws and they are perfectly tighten, so what can I check more?
thanks
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ibn
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Re: shifting on same layer

Fri Mar 02, 2018 11:40 pm

have you observed what is actually happening a this height? is the printer re-homing? Is anything binding?

edith.f
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Re: shifting on same layer

Sat Mar 03, 2018 12:32 am

I have exacly the same problem, i can't figure out what's causing this, it's driving me crazy

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Brigandier
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Re: shifting on same layer

Sat Mar 03, 2018 12:37 am

If you guys aren't observing this when it happens, there's a very real chance this could be crash detection triggering a rehome and the printer not quite recovering. Try this with crash detection and filament sensor off and see if you still have the issues.
Waiting for MK3 to be worth using... still waiting...
My MK3 Parts: [New Shoes] [TPU Micro Springs]
My MK3 Software: [G81 Heatmaps] [OctoPrint Heatmaps]

edith.f
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Re: shifting on same layer

Sat Mar 03, 2018 12:57 am

It happens in normal mode as well as in stealth mode, its not crash detection, it doesnt rehome, its always on the same height.
not a slicer issue cause it happens with slic3er and s3d.
Printing via SD card, also replaced the original with a brand new SD card, still happening.
It's also happening on different firmwares.
Also tried different Filaments.

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RHDreambox
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Re: shifting on same layer

Sat Mar 03, 2018 9:59 am

If the problem is repeated at each print, you should search the error on any of the Z components.
Common mistakes are that the Z-screw covers are too tight, the Trapezoid nut is too tight or the Linear bearing or the Smooth rods are defective.
I do not think the problem is software related.
Happy owner of a Prusa MK3

edith.f
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Re: shifting on same layer

Sat Mar 03, 2018 12:43 pm

I completely rebuilt the Z-Axis, and still the Problem is present

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RHDreambox
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Re: shifting on same layer

Sat Mar 03, 2018 5:17 pm

At what level does the problem arise?
Is it when the printout changes from Solid bottom layer to Infill? What values do you have on Perimeters, Top and Bottom layers?
Happy owner of a Prusa MK3

edith.f
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Re: shifting on same layer

Sat Mar 03, 2018 10:35 pm

So I was wrong, completely.
I switched to 3.1.1, and did some other changes to the Printer (replacing bearings etc.) that's where I started noticing the problems.
I then flashed to 3.1.2 and the problems were the same. so i reverted all mods, rebuilt z-axis, optimized the filament path from outside my enclosure. nothing worked. Finally I switched back to Changes in 3.1.1 b138 RC3.

My "layershift" occurs at the height where it goes to only perimeters / walls
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vladimiro.c
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Re: shifting on same layer

Fri Mar 16, 2018 8:40 am

anyone managed to solve the problem?I disabled crash detection with no success.
I've seen sometimes prints have not this type of problem, I'm going crazy

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