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Intense layershift after Core One + Upgrade  

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chrizzlmashizzl
(@chrizzlmashizzl)
Member
Intense layershift after Core One + Upgrade

Good evening fellas.

I just finished the upgrade from MK4S to Core One +. After calibrations and belt tuning the first testprints got a crazy layer shifting and I dont know why.

Upper belt straight 98hz, lower belt 92hz.

I'm worried maybe the pulleys are not tight or simply loose? Although I just checked every step while upgrading carefully..

Can you give me some ideas to check on? Need to fix this till friday:(

This topic was modified 3 days ago 2 times by chrizzlmashizzl
Posted : 04/03/2026 5:01 pm
abmantis
(@abmantis)
Eminent Member
RE: Intense layershift after Core One + Upgrade

Share some photos of the belts, the gantry, motors, etc. Record a video of it all while printing (and zoom around). 

If belts are tensioned correctly already (those frequencies seem fine), then something is probably not assembled properly, but without any info its hard to tell.

Did you ran the calibration procedure completely? No errors?

Posted : 04/03/2026 11:27 pm
Mac-N4MCC
(@mac-n4mcc)
Estimable Member
RE: Intense layershift after Core One + Upgrade

Especially photos of left and right pulley.  Do all your AXIS test pass?

Extra HAM (and eggs some say) Radio - N4MCC

Posted : 04/03/2026 11:49 pm
hyiger
(@hyiger)
Noble Member
RE: Intense layershift after Core One + Upgrade

 

Posted by: @chrizzlmashizzl

Good evening fellas.

I just finished the upgrade from MK4S to Core One +. After calibrations and belt tuning the first testprints got a crazy layer shifting and I dont know why.

Upper belt straight 98hz, lower belt 92hz.

I'm worried maybe the pulleys are not tight or simply loose? Although I just checked every step while upgrading carefully..

Can you give me some ideas to check on? Need to fix this till friday:(

You should check if the gantry is still square with the frame with the belts completely loose. Have a look at this article: Adjusting belt tension pay close attention to the section on "Quick Gantry Alignment"

Posted : 05/03/2026 12:21 am
abmantis
(@abmantis)
Eminent Member
RE: Intense layershift after Core One + Upgrade

I don't think layer shifts this severe are caused just by gantry not being squared. It would have to be reaallly bad for this to happen, which will then make it fail homing. 

Posted by: @hyiger

 

Posted by: @chrizzlmashizzl

Good evening fellas.

I just finished the upgrade from MK4S to Core One +. After calibrations and belt tuning the first testprints got a crazy layer shifting and I dont know why.

Upper belt straight 98hz, lower belt 92hz.

I'm worried maybe the pulleys are not tight or simply loose? Although I just checked every step while upgrading carefully..

Can you give me some ideas to check on? Need to fix this till friday:(

You should check if the gantry is still square with the frame with the belts completely loose. Have a look at this article: Adjusting belt tension pay close attention to the section on "Quick Gantry Alignment"

 

Posted : 05/03/2026 12:26 am
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