- Joined
- Jul 11, 2015
- Messages
- 135
Hey all, I just finished making a RPC out of a 1.5hp Baldor motor to power my Bridgeport.
Nothing fancy, 220 1 phase to a disconnect, then from the disconnect to the motor. Then three legs from the motor to the outlet.
No start or run capacitors at the moment.
Runs great, but here's the weird: it starts up on its own! Everything I've read and watched says I'd need either another single phase motor to spin the three phase up or a start capacitor and switch to momentarily power the third leg to start the three phase up.
But I engage the disconnect, (old school blade style), and the thing spins right up, works great, and is quiet. (With or without the Bridgeport plugged in.)
Any idea on that one?
Secondly, I have run a ground wire to the chassis of the Baldor since I'm used to grounding everything. But the motor doesn't appear to have a provision for it; I used a random mount screw. The only connectors the Baldor has is the hot wiring. Is having the chassis grounded going to be an issue? I'm assuming not since whatever the motor would have been installed in would likely be grounded, but I wanted to be certain. First time for me working with three phase and it seems straight forward, but wanted to check with people that know.
TIA!
-Niles
Nothing fancy, 220 1 phase to a disconnect, then from the disconnect to the motor. Then three legs from the motor to the outlet.
No start or run capacitors at the moment.
Runs great, but here's the weird: it starts up on its own! Everything I've read and watched says I'd need either another single phase motor to spin the three phase up or a start capacitor and switch to momentarily power the third leg to start the three phase up.
But I engage the disconnect, (old school blade style), and the thing spins right up, works great, and is quiet. (With or without the Bridgeport plugged in.)
Any idea on that one?
Secondly, I have run a ground wire to the chassis of the Baldor since I'm used to grounding everything. But the motor doesn't appear to have a provision for it; I used a random mount screw. The only connectors the Baldor has is the hot wiring. Is having the chassis grounded going to be an issue? I'm assuming not since whatever the motor would have been installed in would likely be grounded, but I wanted to be certain. First time for me working with three phase and it seems straight forward, but wanted to check with people that know.
TIA!
-Niles