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If (as a retired teacher of metalwork etc) I had to select metals for milling, copper would not be near the top of the list - even cnc milling the thin layer on printed circuit boards often tore the copper from the grp - a straight single flute engraving tool was about the only thing I'd let students use, with close supervision against the moment the tool got stuck and stalled the motor.
I'd be genuinely interested in the details if you get this to work!
MrE-
The information from this place is awesome.
Thank you. -
If (as a retired teacher of metalwork etc) I had to select metals for milling, copper would not be near the top of the list - even cnc milling the thin layer on printed circuit boards often tore the copper from the grp - a straight single flute engraving tool was about the only thing I'd let students use, with close supervision against the moment the tool got stuck and stalled the motor.
I'd be genuinely interested in the details if you get this to work!If I figure it out i'll definitely let you know.
My spindle is about as low powered as it gets and I am only cutting super slow and only nibbling the top 0.1mm with each pass. so whilst its really slow its actually cutting through fine. Its more the incredibly rough cut finish that is the problem. I'm using a 1.4mm corn cob end mill which I think might be the problem. I've read a few people saying the same as you...that 1 or 2 proper flutes with a straight end...so that is what i'll try next.
JurekB
Stonehedge
I did my first test cut (a dog collar tag) on some copper sheet and it turns out that I either have the wrong type of copper (annealed maybe?) and/or also the wrong type of end mill (upcut). The edges came out a bit torn up.
More copper and more end mills purchased. Because everybody loves expensive rabbit hole hobbies.