I am not a machinist, but I am designing a cnc mill to machine sheetmetal. It will be used on 16 ga crs and sst. Using a 1/4" end mill (mist cooling), I need to choose a spindle rpm, hp, and feed rate. I am hoping someone will have some input based on thier experience.
I am looking at 2 options for a spindle motor. 2 hp and 5hp at 18,000 rpm. I can use a VFD to slow down the spindle, but the HP will be proportional to the rpm.
The 2 spindle motors will require different machine designs since the forces will be greater with the larger HP motor.
Any input will be greatly appreciated.
Best Regards,
Ron Chacich