I’m trying to print small parts with a hollow cylindrical part that should be 8.4 mm but sticks out between 7.9 and 8 mm.
I checked, and the model is indeed 8.4 mm.
The outer diameter provided at 20.4 mm is 19.9 mm.
My filament is white PETG from Bambu, which I calibrated with a flow rate of 0.9677 and k = 0.044.
hmm, 19.9 instead of 20.4 is quite a lot. that is like 2,4%. I doubt that shrinking alone can cause that. For PETG, I typically have shrinkage values around 0,30% … 0,45%.
I’m a bit puzzled how such a small part can be off that much. No clue.
Still it is certainly a good idea to do the shrinking test and see which values you get.
Alex, look — with you, I’ve worked miracles! Do you remember I used to have holes smaller than 0.3 mm?
After the calibrations, I’m now printing with zero error — I’m measuring with a hundredth-millimeter caliper!
I’m beyond happy. I’m truly grateful to you.
@Alex_vG I did your measurement test and got a result of 99.699%.
By entering this result into the slicer, the part width is now 20.28 mm (instead of the planned 20.40 mm).
The hole width is 8.23 mm (instead of the planned 8.4 mm).
So some hundredth-millimeter are missing again…
