Shawn_Laughlin
Aluminum
- Joined
- Mar 28, 2019
This could all be bc I don’t have much experience with milling but I do on a lathe, at least manual not cnc. So I understand tool deflection and how important feeds and speeds and other things are but when cutting with a razor sharp emdmill in aluminum,taking a skim of a cut at a depth of .015625 / 1/64”, at 10,000rpm and 40 ipm, with a .375 step over, the finish should be smooth as long as machine is level and spindle is trammel, right?
I understand these aren’t the ideal feeds and speeds but moving at such a slow ipm there should be no material left to cut if I run back over the work without changing the z depth,right?
I can run over it 3 or 4 more times and it keeps making chips. Not like if it was a fresh cut but enough so that each pass takes off more and more and its as smooth as I think you could possible get.
It’s been coining also so kinda makes me feel like it’s a controller problem than can be programmed out maybe?
It’s weird thou bc it doesn’t matter if I’m spinning a 3” face mill or 1/2” endmill, the steps feel the same. Easily catch your finger nails on them. I would think that a 3” face mill with the wider tool path would have a much more pronounced step but it doesn’t look that way. I broke my indicator and have another one that’s suppose to be delivered today so I’ll check when it comes in.
I understand these aren’t the ideal feeds and speeds but moving at such a slow ipm there should be no material left to cut if I run back over the work without changing the z depth,right?
I can run over it 3 or 4 more times and it keeps making chips. Not like if it was a fresh cut but enough so that each pass takes off more and more and its as smooth as I think you could possible get.
It’s been coining also so kinda makes me feel like it’s a controller problem than can be programmed out maybe?
It’s weird thou bc it doesn’t matter if I’m spinning a 3” face mill or 1/2” endmill, the steps feel the same. Easily catch your finger nails on them. I would think that a 3” face mill with the wider tool path would have a much more pronounced step but it doesn’t look that way. I broke my indicator and have another one that’s suppose to be delivered today so I’ll check when it comes in.