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Sometimes layer shifting in x or y  

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wimschuiteman
(@wimschuiteman)
New Member
Sometimes layer shifting in x or y

Hey,

I get in some prints layer shifting. First, it does -0,6± and then +0.6 ± then -0.6±.

I have checked all the belts and pulleys they look all fine.

Layer shifting

This topic was modified 4 years ago by wimschuiteman
Posted : 20/03/2020 10:11 am
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: Sometimes layer shifting in x or y

that looks like loose Grub Screws, on the Motor Pulley. 
regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Posted : 20/03/2020 11:01 am
ben.g16
(@ben-g16)
Estimable Member
RE: Sometimes layer shifting in x or y

I have the same problem, but I have found it is associated with Various features of the object.

1. The horizontal planes on the other side of the wall.  In the attached pic you can clearly see the layer shifting whenever there is a horizontal plane on the other side of the vertical wall.  The motor mounting planes are the best illustration.  The wall thickness is 1.29mm in the CAD dwg.

2.  A “feature” on the other side of the wall.  Note the one just below the two screw holes (cavities) match a 45º wedge on the back side.  The shift stops at the right end of the wedge.  Likewise right below the X,Y,Z is a horizontal layer.

3.  A surface level.  The surface above right hand motor affects the left side of the motor block.  It is most pronounced on the left (visible) side, and almost not visible in the right (away) side.

My question is why, of course.  Is there a particular thickness to the wall that makes it bump out?  Should I change the way I assemble to parts of the dwg (extrusions, joining surfaces,…)?  I presume this error occurs in the slicer (PrusaSlicer 2.2).  I have seen it in all the versions.

Attachment removed
Posted : 19/04/2020 9:11 pm
ben.g16
(@ben-g16)
Estimable Member
RE: Sometimes layer shifting in x or y

I think I found a solution for the outside wall layer shifting parallel to internal structures.  When I made the wall thickness match the “magic number” of 1.69mm with 4 perimeters, the layer shifting disappeared (on one test).  I will see if that holds up. 

Posted : 06/05/2020 2:52 pm
ben.g16
(@ben-g16)
Estimable Member
RE: Sometimes layer shifting in x or y

The forum lost the pic.  Here it is.  (This is a cancelled print due to support structure issues.)

 

Attachment removed
This post was modified 4 years ago by ben.g16
Posted : 06/05/2020 3:03 pm
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