I have a clip I’m printing where I want to add a screw hole. Because of the clip overhangs & orientation, the hole is printing vertically.
In the photo, the blue lines indicate the layers. What’s interesting is, the green dimension is correct and matches what I have modeled, but the red dimension is printing in the horizontal direction and is shrinking my hole (I was expecting the opposite to happen)
Any suggestions on how I can fix this so I get a round hole? Why is my horizontal layer shrinking my hole?
Two things you can try..
1st: you can reorientate the model to see if it prints better, maybe towards the green mark.
2nd: add .05 to the horizontal compensation of the side that is affected.
Your model is VERY challenging for the FDM process. Sharp corners are VERY prone to over extrusion.
Make the wall where the hole is thicker and/or reduce the depth of of the countersink. The goal is to split the 135° turn into a 45 and a 90 with a short straight section between the bends.
Carefully tuning pressure advance will vastly improve the accuracy of sharp corners.
Orca Slicer has built in calibration routines for pressure advance. Also see:
