I’m relatively new to 3D printing and very new to Cura. I’ve modeled some components which have an inner dimension as well as an outer dimension (think a tube / cylinder with a hole in it. I’m finding that the dimensions I model in fusion 360 do not match what the printer is putting out. I suspect that it’s off by approximately half the wall thickness specified in Cura but haven’t conclusively determined if this is the case.
What is the best practice for modeling and printing dimensi
Cura knows to offset the lines by half the nozzle width. So that's not it.
However vertical holes are always printed too small. Add around 0.4 or 0.5mm to every vertical hole diameter in CAD.
Also other things you can do to improve other dimensions:
Make all printing speeds the same and around 35mm/sec or even 25mm/sec for super accurate. Disable jerk and acceleration control (this will make ringing worse but will make dimensions more accurate).