I am trying to make an acrylic cover that attaches to another object using magnets. I have done at least 50 different test engraves with various settings to try and etch out a nice “hole” for the tiny magnet.
Working with Proofgrade Medium Clear Acrylic
The issue is, that the kerf messes with the size. The magnet is 3mm in diameter, and i have a hole that is 3.1mm that i set to etch from the acrylic. The issue is that the top of the engrave is fine with a very small “gap”, but the bottom work out to something like 2.7mm because of the kerf.
I tried setting the material thickness to 0.1 mm to attempt to get a negative kerf going, with no luck. I also tried increasing the thickness to 8mm even to see if i can just elongate the kerf itself to make it less noticeable. Neither one of those methods seem to work properly.
I want to avoid making a 3.5 mm engrave as that would be too much gap near the top of the magnet, but would allow it to sit nicely at the bottom since it would then be approx 3.1mm at the bottom.
QUESTION: Has anyone done anything like this to try to achieve a ‘negative’ kerf?
**This would actually also be useful for inlays as well, just on a smaller scale.