PrusaXL clogged when multicolour with many toolhead changes
 
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PrusaXL clogged when multicolour with many toolhead changes  

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DietrichJ
(@dietrichj)
Member
PrusaXL clogged when multicolour with many toolhead changes

Hi

I have a PrusaXL with two toolheads. When printing with a single colour, I have zero issues. When printing in two colours, but only a single tool change, I also have zero issues. But when printing multicolour with many changes, the first nozzle always gets a clogged error. The nozzle isn't clogged, but it does make a loud skipping noise. When I unload and load the filament, the printing resumes for a minute or two. Then I get the same error. But when printing without colour changes, the error never happens. I have had this happen on two different files when doing many toolhead changes. It happens at the wipe tower. I have added a video and it happens at the end.  https://photos.app.goo.gl/76YCeiVv78NELEi69  

Can you help me fix this? 

Posted : 16/05/2025 6:17 am
Pe3d
 Pe3d
(@pe3d)
Eminent Member
RE: PrusaXL clogged when multicolour with many toolhead changes

Hi,

Maybe you have to adjust the idler Pension.

https://help.prusa3d.com/article/idler-screw-tension_177367

Posted : 16/05/2025 2:05 pm
1 people liked
DietrichJ
(@dietrichj)
Member
Topic starter answered:
RE: PrusaXL clogged when multicolour with many toolhead changes

Hi

I tried as you said, but it did not work. It keeps getting a clog error when changing toolheads a few times. 

Also the filament in the first extruder always curls up as in the video below.

https://photos.app.goo.gl/aPgQaCF7MXrcgXLt9

Thanks

Posted : 19/05/2025 9:13 am
Pe3d
 Pe3d
(@pe3d)
Eminent Member
RE: PrusaXL clogged when multicolour with many toolhead changes

Maybe a clogged nozzle

https://help.prusa3d.com/article/clogged-hotend-xl_401294

You also could try to raise the temperatur 5-10°C 

Posted : 19/05/2025 4:38 pm
1 people liked
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