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Layer shifting  

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rachel-anne.h
(@rachel-anne-h)
Active Member
Layer shifting

Hi,

Finished building my MK3 the other day and finally started printing.
But on every print I get a layer shift at roughly the same point.
I've checked my belts and they are tight enough to make the dull base twang as described in the manual.
I've checked the grub screws on the pulley and tightened them.
Firmware is up to date.
Filament is properly wound with no pieces getting caught under other pieces.
And the extruder and carriage move smoothly along the XY axis.
The only change I've made that seems to make any difference is that if I run the printer in stealth mode the shifting becomes less severe but happens more often.

[attachment=0]20181013_200831[1].jpg[/attachment][attachment=1]20181013_200859[1].jpg[/attachment]

Respondido : 13/10/2018 9:16 pm
LaPointe
(@lapointe)
French moderator and translator Moderator
Re: Layer shifting

Even though you think that your belt tensions are good, what are the values of your belt status?

Respondido : 13/10/2018 11:04 pm
rachel-anne.h
(@rachel-anne-h)
Active Member
Topic starter answered:
Re: Layer shifting

x:284
y:284

Respondido : 13/10/2018 11:13 pm
LaPointe
(@lapointe)
French moderator and translator Moderator
Re: Layer shifting

Ok, they're perfectly fine.
In which direction do you have this layer shifting?

Respondido : 14/10/2018 10:10 am
rachel-anne.h
(@rachel-anne-h)
Active Member
Topic starter answered:
Re: Layer shifting

It seems to be offset to the right hand side and slightly towards the back.

Respondido : 14/10/2018 12:34 pm
Holger
(@holger-2)
Honorable Member
Re: Layer shifting

Which slicer do you use?
We have also encountered problems with Slic3r-PE 1.41.0 printing round things.
https://shop.prusa3d.com/forum/hilfe-zur-hardware-firmware-und-software-f275/slic3r-wandstaerken-fehler--t24917.html
Try printing the Benchy with Cura and see if it looks similar, to be sure the issue results from your printer.
It can also be on your printers Z-axis, the spindles rotate eccentrically at a certain height, but...

greetings Holger

2x Personal MK3IR-BMG09 (Full) BEAR + MMU3 mod., ...

Respondido : 14/10/2018 3:48 pm
rachel-anne.h
(@rachel-anne-h)
Active Member
Topic starter answered:
Re: Layer shifting

I used Slic3r.
Trying with Cura now.

Edit:
Change made no visible impact.

Respondido : 14/10/2018 5:15 pm
holten.c
(@holten-c)
Active Member
Re: Layer shifting

I had a slight layer shift and solved it by turning off crash detection.

Respondido : 14/10/2018 7:35 pm
rachel-anne.h
(@rachel-anne-h)
Active Member
Topic starter answered:
Re: Layer shifting

Crash detection is already off.
Beginning to think I'll never get a 100% successful print 🙁

Respondido : 14/10/2018 7:53 pm
LaPointe
(@lapointe)
French moderator and translator Moderator
Re: Layer shifting

If you print a simple cube, do you have the issue?
If yes, in both X and Y axis?

Respondido : 14/10/2018 9:21 pm
rachel-anne.h
(@rachel-anne-h)
Active Member
Topic starter answered:
Re: Layer shifting

When printing a cube it appears to be a y axis shift

Respondido : 15/10/2018 8:25 pm
LaPointe
(@lapointe)
French moderator and translator Moderator
Re: Layer shifting

Ok so you can try 2 things (not at the same time). First, you can try to put a bit more tension to the Y belt and retry. If you have still the issue, you may have tighten too much the bearing U-bolts, so you can try to unscrew them a bit.

And check also that the Y cable bundle isn't interacting with anything.

Respondido : 15/10/2018 9:50 pm
rachel-anne.h
(@rachel-anne-h)
Active Member
Topic starter answered:
Re: Layer shifting

Thank you all for your help, I'm not entirely sure what I've done but it appears to be fixed.
😀

Respondido : 15/10/2018 10:05 pm
LaPointe
(@lapointe)
French moderator and translator Moderator
Re: Layer shifting

Happy to help 😉

Respondido : 16/10/2018 7:09 pm
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