Electronics > Projects, Designs, and Technical Stuff
Cheap CNC Machine to Cut Front Panels?
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In Vacuo Veritas:
mikeselectricstuff:
For hand cutting, a fretsaw like this works well
https://www.zoro.co.uk/shop/hand-tools/saws---coping--fret-and-flexisaws/70-fs1r-(fs70)-fret-saw-frame/p/ZT1008912X?utm_campaign=pla-Hand+Tools+-+&utm_source=google&utm_medium=shopping-pla&utm_keyword=ZT1008912X&istCompanyId=6aa6787b-063e-4414-802d-129f235df603&istItemId=wtqirimrql&istBid=tztx&gclid=CjwKCAjw8uLcBRACEiwAaL6MSV9lVM_DLaM5FpAolUtZq-OsbX4HYDheciYjol_LahWtMPApc8EtvRoCYrgQAvD_BwE

Then finish with a file.

rstofer:
I built a front panel from two sheets of Acrylic with a paper printout from the CAD tool sandwiched in between.  The actual drilling was done on a small converted CNC mill (Grizzly GO704).

Sure glad I bought my mill before Trump tacked on a $345 tariff.
http://www.grizzly.com/products/Mill-Drill-with-Stand/G0704

I plan to use the sandwich scheme in the future.  It works well, looks nice and the lettering is protected by the top sheet of Acrylic.

The good news is that I don't have any square openings.  If I did, I would do as I suggested above and rough cut the opening with a large diameter cutter (to lessen the chance of breaking) and then clean it up with a small diameter cutter.  If absolutely necessary, I could square up the remaining radius with a file but I would really like to avoid that.
Apollyon25_:
You can get a 90deg corner by overmilling in one direction slightly...
Wan Huang Luo:
Just get a broach tool and be done with it
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