RE: Hole size issues
All versions? Or from which?
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RE:
The slicer is generating the tool paths to create your geometry. This is why things like extrusion width are variables in the slicer. The slicer automatically compensates based on extrusion width to create your geometry.
There are also other variables such as elephants foot compensation that will offset your perimeters even further on the first layer to compensate for the additional squish applied to the extrusion on the first layer.
The smaller hole is because of material shrinkage, unless the kinematics of your printer are way off. But most printers these days have pretty good kinematics.
RE: Hole size issues
I have checked the slicer output. It does offset for the filament width around a hole. There are multiple factors that make small holes too small on 3d FBM printers.
My notes on 3d printing accuracy are on this page if you want details. https://www.hubbardhobbies.com/3dprinting/3D-printingnotes.html
RE: Hole size issues
https://www.hubbardhobbies.com/3dprinting/3D-printingnotes.html
Great write-up! An eye opener for me on a few things. Very forward thinking.
MK4S/MMU3
RE: Hole size issues
The CAM software I use at work for our CNC plasma table (of course) has compensation for kerf, and you have options within each operation to do an inside, outside, or online cut in relation to the cad geometry. Nothing would be right without it, and it would be a similar story in 3d printing if it wasn't accounted for.
I make small accommodations to my designed geometry, and my Mk4(s) has always been extremely consistent and reasonably close. It's quite possible that other brands of printer don't print to the same tolerances.
-J
RE: Hole size issues
This is a common issue in 3D printing, often due to printer calibration and material shrinkage. Adjusting hole sizes in your model is a practical solution, but for a more permanent fix, you might want to:
1. Calibrate your printer's axes to ensure accurate prints.2. Experiment with different slicing software, as some handle tolerances better.3. Consider material-specific shrinkage rates.
Regularly calibrating and testing with test prints can help maintain accuracy over time. Hope this helps!