This quote is from another thread (viewtopic.php?f=4&t=162&p=1258#p1258
bkgable wrote:... I expect the Shapeoko will need some "smart" stiffening to cut aluminum and smoothing the current steps would also help. This is still to be tested as near as I can tell. ...
Instead of hijacking that thread, I'll reply here:
I was cutting aluminium plate yesterday, with my Shapeoko. I cut a 4" x 4" x 1/4" piece of aluminum plate, from a larger piece, to 'experiment' with. Playing with different pass depths and feed rates. Here are some notes I kept of the process.Overview:
- 2 flute 1/8" endmill.
- Depth pass was set to .0125"
- stepover was set to .0625" (50% of bit diameter)
- incrementing depth .0125"
- Feed Rate was set to 12in/min
- generic dremel turned on high (30k RPM?)
- liberally applying WD40 as the job was being cutAt one point I was running 60ipm
- taking *very* shallow passes (0.002").
- stepover set to .03125" (25% of bit diameter)Some other things to consider:
- would more flutes help? Would less flutes?
- is WD40 (or any lubricant) necessary?
- (deeper passes + slow speeds) vs (shallow passes + higher speeds?)
Shapeoko #0 - a couple of upgrades.