Single phase to three phase equivalent

[DavidR8]

I had a thread going on single to three phase conversion.
This video series was recommended by @luxige and I found it highly informative.

Possible motor for mill

Thanks @ttabbal I’ll keep my eyes open for a suitable 3ph motor Sent from my iPhone using Tapatalk Since you're probably going to have to make an adapter anyway, if it was me I'd take this opportunity to bump the HP up on the motor a bit, more available power won't hurt at all. 1-1/2 to 2hp...

www.hobby-machinist.com

 

[Karl_T]

mistake here

 

[Suzuki4evr]

Post a picture of the nameplate on the motor..

motor nameplate - Google Search

The nameplate is so faded that it would not be visible to you. Sorry.

 

[ErichKeane]

The nameplate is so faded that it would not be visible to you. Sorry.

The reason we ask is you're going to need to match the 'frame' and RPM of the old motor to the new one. If you don't match RPM, the speeds on your lathe will be all wrong (double or half!). If you don't match the 'frame', it won't be bolt-on and you'll have to machine an adapter plate, or drill new mounting holes (if thats even possible).

 

[Suzuki4evr]

This is the best pic of the plate. You can hardly make something out.



I do not mind if the VFD speeds don't match the speed range plate of the machine. I would be able to make base plate for a bigger size motor. This won't be a problem. I am trying to achieve not to change belts anymore and have closer speed options,because of the big jumps between speeds as it is now showing in the pic below.

 

[DavidR8]

Is that a round column mill?
If it is there’s a 99.9% likelihood that it’s a 1800 rpm motor.
Is it a gear head mill or is the motor hung off the back?

Edit: can you take a side view shot of the whole machine please?

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[Suzuki4evr]

The riserblock is a new addition, but no it is not a round column mill it is a knee mill belt driven.

 

[DavidR8]

Thanks
That makes motor selection a bit more complete because the motor mounting face needs to match the housing.

Plus it would be helpful if shaft diameters match so you don’t have to bore or shim the drive pulley bore.

Can you measure the mounting bolt distances without having to remove the motor?


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[Suzuki4evr]

Will do when I get back. Must go somewhere quickly.

 

[Suzuki4evr]

Thanks
That makes motor selection a bit more complete because the motor mounting face needs to match the housing.

Plus it would be helpful if shaft diameters match so you don’t have to bore or shim the drive pulley bore.

Can you measure the mounting bolt distances without having to remove the motor?


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Distance is approximately 210mm (8.267") center to center