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X-Y axis off by 0.2mm suddenly  

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Hondanickx
(@hondanickx)
Active Member
X-Y axis off by 0.2mm suddenly

I bought my Prusa MK3S brand new assembled from prusa in june 2021.I have been printing a lot of prints  since then without any real problems .(clogged nozzle once and loose heat end).Lately i noticed my X and Y measurements where off 0.2mm on a cylinder that needed to be 57mm.I did not changed a thing ,checked belt status which was fine (251 and 270)  and skew is actually improved now 0.00 (when i bought it it was 0.02). Do i need to recalibrate the steps/mm or should i be looking for something else ?
The Z measurements are perfect btw.
 

Posted : 05/12/2021 1:15 pm
JoanTabb
(@joantabb)
Moderator
RE: X-Y axis off by 0.2mm suddenly

Maybe belts loose or toothed gears loose. Or idlers failing 

 

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 : 05/12/2021 1:49 pm
Hondanickx
(@hondanickx)
Active Member
Topic starter answered:
RE: X-Y axis off by 0.2mm suddenly

If the belts where loose then the belt status wouldn't be 251 /270 ...So i don't think that could be it.

Posted : 05/12/2021 2:00 pm
Diem
 Diem
(@diem)
Noble Member

0.2mm is actually quite accurate, it's half the width of the standard nozzle.  All sorts of variables might affect accuracy at this level: - temperature variation causing thermal expansion/contraction, extrusion multiplier, the order in which you print your perimeters, whether your filament is damp and which type of filament are just a few.  And, of course, your printer has had 5 months of work to run-in and it's initial settings were for a brand new machine.

@joantabb is implying that it's time for a general maintenance session, which should come a long time before attempting any more fundamental changes.

After maintenance and recalibration your now run-in printer will be more stable so it only remains to reinstate the initial printing conditions:  Use new or freshly dried filament and ensure the workroom is at a similar temperature and you should get similar results.

Cheerio,

Posted : 05/12/2021 2:42 pm
Hondanickx
(@hondanickx)
Active Member
Topic starter answered:
RE: X-Y axis off by 0.2mm suddenly

My prusa printer is in a enclosure .I changed the x and y axis dimensions afterwards in the drawing ( +0.2mm) and it came out perfect on 57mm.This was all printed on a 0.6mm nozzle with prusament petg on prusa settings with the prusaslicer.
Filament is always stored in a vacuum sealed bag inside a sealed container.
It is however time to do some maintenance haven't done that since i bought it.I will start from there .But if things don't change could i  go ahead and look into changing the steps/mm?   

Posted : 05/12/2021 3:10 pm
Swiss_Cheese
(@swiss_cheese)
Noble Member
RE: X-Y axis off by 0.2mm suddenly

@hondanickx

 

I'm just throwing this out there, just in case, Is it possible that you have 0.1 or 0.2 entered in Print Settings/Advanced/Slicing :XY Size Compensation, in Slicer?

 

Regards

 

Swiss_Cheese

The Filament Whisperer...
Posted : 05/12/2021 7:13 pm
Diem
 Diem
(@diem)
Noble Member

Filament is always stored in a vacuum sealed bag inside a sealed container.

In extreme cases PETG can absorb enough water to cause problems within the time it takes to complete a larger print... it is almost always worth drying.

if things don't change could i go ahead and look into changing the steps/mm?

It is usually a mistake to alter settings to 'fix' a general printing problem.  Changes should be reserved for cases where a generally well set up machine needs to handle a non-standard-print problem.

If things don't change come back here with pictures of the issue and a zipped .3mf of the project file.

Cheerio,

 

Posted : 05/12/2021 11:01 pm
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