i’m really new in 3D printing (bought my Anycubic i3 Mega in december 2018), but i learn very fast. For a special problem, however, I need your help.
First of all, i did a extruder calibration. I printed a cube with a single wall and set my multiplier in Simplify3D for a nearly perfect 0,4mm thick wall. I printed also a cube for measuring, but when i calibrate it only for 20x20x20mm (toleranz +/- 0,02mm) and printed a larger object (150mm) the accuracy was terrible. So i did a mix for larger and small objects. A 20x20x20mm Cube is (example) 20.03x20.02x19.99mm and over a larger straight about 100mm it is 99.95mm.
BUT…when i printed a 10mm hole within the object, the hole is only 9.80mm. The mesh from my CAD Software (FreeCAD) has a high resolution, so this is not the problem…i hope.
For a workaround, I could increase the radius of the hole by 0.1mm. But i actually only bought the 3D printer for building Actuators for my Simracing Rig. When printing these components, accuracy is pretty important.
What can I do and why is the accuracy only for holes so “bad” … or is it normal for a printer in this price range?
I print with PLA … I almost forgot to mention.
Thank you in advance, Oliver