- Joined
- Jul 27, 2021
- Messages
- 221
Greetings - I am finishing up my VFD control box and with any luck will have time this weekend to get it installed onto the mill (HF RF31 clone). My motor is three phase 2 HP 1725 RPM and I have the VFD set with a minimum frequency of 6 hz (1:10 from 60) and a max at 120. This gives me ~172RPM up to 3450 RPM at the motor. The existing motor is listed at 1720 RPM so it is similar from the outset but with the VFD if I want to I can push the speed to double.
My question is what those of you with more experience would find to be a good range. I want to have a lower speed to use a coaxial indicator, so I am leaning on the lower end, but wondered if speeds in excess of 3450 RPM would be desirable. I am generally going to be milling aluminum and some steel.
While I can always change the belt configurations to increase or decrease RPMs, the whole point is to do that rarely, unlike now. I am trying to figure out an "optimal" initial belt configuration.
Thanks
Tom
My question is what those of you with more experience would find to be a good range. I want to have a lower speed to use a coaxial indicator, so I am leaning on the lower end, but wondered if speeds in excess of 3450 RPM would be desirable. I am generally going to be milling aluminum and some steel.
While I can always change the belt configurations to increase or decrease RPMs, the whole point is to do that rarely, unlike now. I am trying to figure out an "optimal" initial belt configuration.
Thanks
Tom