A lot of the parts I print are small and cylindrical or near cylindrical in shape. Unfortunately I have noticed a consistent “out of round” condition on all my prints so I started doing some experiments to track down the issue. I tried doing the custom calibration and got good results out of the calibration part (see details below), but my parts are still not printing circular.
The prints were made using the standard grey resing and I have a Peopoly heater in the chamber. All 3 prints show an out of round condition with the long axis appearing roughly in the same direction (long axis running roughly 45deg from back/left to right front corners of the build plate.
Using dial calipers, I made the following measurements. Note the diameter of the part is nominally 0.300" [7.62mm]. I would expect a small amount of shrinkage from the resin ~.002" [0.05mm], but I see out of round conditios on the order of .006-.018" [0.15-0.46mm] or about 5% of the diameter.
In ideas on how to correct this issue or what might be the problem are appreciated.