9100
Diamond
- Joined
- Nov 1, 2004
- Location
- Webster Groves, MO
I am in the process of putting VFDs on the spindle and work head of a Heald cylindrical grinder. The primary reason is that the work head has one fixed speed that is too fast for heavy unbalanced parts. The feed is from a separate motor and gearbox, not geared like a lathe. We were considering putting a VFD on the feed motor, also, when the owner asked if we could run both motors off one VFD, keeping the ratio between them. The work head has a 5 hp motor and the feed 3/4 hp, both three phase 9 wire configuration. The VFD is a 10 hp one that we happened to have. I currently have it haywired in a test setup on the work head and is working fine. I don't see a reason we can't do that. The only objection might be that the feed motor will come up to speed quickly and the work head with a large 4 jaw chuck takes longer. Since I have it set to ramp up, that shouldn't be a consideration, but I thought I would ask. Would braking be a problem?
Bill
Bill