FJsapper
Cast Iron
- Joined
- Nov 18, 2020
- Location
- Sterling Heights, MI
I am continuing to work through the Bradford Metalmaster posted in the vintage section (https://www.practicalmachinist.com/...rd-metalmaster-384378/index2.html#post3671277).
I am starting to work on how i am going to power this thing. The power hookup in my garage is for 220v single phase. I would like to run the lathe on 220v 3ph so a VFD will be involved. This will be my only piece of equipment running on 220v so i dont see the need to use a RPC. I also dont think i need any more HP rating for the work i plan to do so 440v and a step up seems like a waste. I see two options:
1) Re-wire the motor for 220v 3ph (if possible) + VFD
2) Acquire a new 220v 3ph + VFD
Only 3x wires protrude from the casing. It seems as if it was re-wired once before and converted to 440v. The data plate was re-stamped at some point and there was a service tag on the motor body. Does this mean it cannot be re-wired unless i start picking the windings apart to find all the different leads? Is there a way to confirm what the motor is actually wired for since i have some conflicting information?
If I elect to get a new motor at 220v 3ph will there be any significant re-wiring or swap of components of the lathe electrical system to accommodate (besides VFD)? Or will I be able to wire it up the same was the 440v was wired?
Data Plate reads 3hp, 1200rpm, 440v stamped and original voltage marked out
This was how the motor was hooked up to the machine
Opened the non-shaft end of the case
Three leads disappear into the windings
I am starting to work on how i am going to power this thing. The power hookup in my garage is for 220v single phase. I would like to run the lathe on 220v 3ph so a VFD will be involved. This will be my only piece of equipment running on 220v so i dont see the need to use a RPC. I also dont think i need any more HP rating for the work i plan to do so 440v and a step up seems like a waste. I see two options:
1) Re-wire the motor for 220v 3ph (if possible) + VFD
2) Acquire a new 220v 3ph + VFD
Only 3x wires protrude from the casing. It seems as if it was re-wired once before and converted to 440v. The data plate was re-stamped at some point and there was a service tag on the motor body. Does this mean it cannot be re-wired unless i start picking the windings apart to find all the different leads? Is there a way to confirm what the motor is actually wired for since i have some conflicting information?
If I elect to get a new motor at 220v 3ph will there be any significant re-wiring or swap of components of the lathe electrical system to accommodate (besides VFD)? Or will I be able to wire it up the same was the 440v was wired?
Data Plate reads 3hp, 1200rpm, 440v stamped and original voltage marked out
This was how the motor was hooked up to the machine
Opened the non-shaft end of the case
Three leads disappear into the windings