Hey all, I've had really good tips on this forum from some really experienced machinists. Hopefully, you gurus can help me out again! I've been trying to cut 1/8 in aluminum sheets with a 1/8 in 2 flute end mill on my Zenbot CNC. However, The bits just keep on breaking. I'm taking cuts at 0.04'' depth, feeds at 20 ipm, and rpm at around 20k. This produced a nice cut at first but after about 2 minutes of pocketing, broke. So I used the G-wizard calculator thinking I would get a good idea where to start- the numbers came out to be about 16k rpm at 30 ipm. I tried that and the end mill had a really bad chatter before any cuts were even made and just snapped. My router maxes out at 24k RPM, so I've ordered some 1/8 in 3 flute end mills. What would you guys suggests for feeds/rpm/depth of cut on a Zenbot machine?
Thanks
Thanks