MeanMachine1980
Aluminum
- Joined
- Dec 30, 2017
Hello
I have a lathe with an older 2hp ac motor. I also have a 3 phase 2hp motor for the lathe. I would like to follow what 98% of others do and install a VFD to the 3 phase motor to get "fine tune" spindle speed. I could also take advantage of the programmable starting and stopping rates within the VFD.
The only problem is that every VFD driven motor I've seen online in videos has that common nasty whine. I know that increasing the carrier freq somewhat decreases it but not totally and at a high cost to the motor and vfd.
Has anyone used a VARIAC? It changes the speed with voltage instead of frequency. They are used a lot on smaller applications but I've never heard one using it in a high torque application like a lathe.
Any info is appreciated.
I have a lathe with an older 2hp ac motor. I also have a 3 phase 2hp motor for the lathe. I would like to follow what 98% of others do and install a VFD to the 3 phase motor to get "fine tune" spindle speed. I could also take advantage of the programmable starting and stopping rates within the VFD.
The only problem is that every VFD driven motor I've seen online in videos has that common nasty whine. I know that increasing the carrier freq somewhat decreases it but not totally and at a high cost to the motor and vfd.
Has anyone used a VARIAC? It changes the speed with voltage instead of frequency. They are used a lot on smaller applications but I've never heard one using it in a high torque application like a lathe.
Any info is appreciated.