3 phase power supply

[lordbeezer]

Took this box off a large commercial treadmill. I’m thinking I saved all wiring and console but haven’t located yet. Would it be useable with out console or wiring? Tried looking up wiring diagram but when enlarged can’t read the diagram

 

[Ulma Doctor]

It can be useful if you’re able to get a diagram or ascertain the pin out of the connections.

Some of the fitness machines utilize more than one motor, (including your machine) you may be able to do the same thing-
maybe x and y leadscrew control (or y and z or x and z) for example

 

[Smithdoor]

Took this box off a large commercial treadmill. I’m thinking I saved all wiring and console but haven’t located yet. Would it be useable with out console or wiring? Tried looking up wiring diagram but when enlarged can’t read the diagram

This conversion to machine tool can be a real pain.

The DC motors are a lot easier to covert for machine tool uses.

Remember a lot motors you fine top speed of 6,000 rpm and most machine tools came with 1,725 rpm motors.

They do high speed/ rpm to cut the cost of copper in motors.
In electronic world they schematic on build conversion for new high speed motors.

I replaced the motor on my mill about 2 years a ago and look at both DC and the new high speed 3 phase. After look at high speed decided the higher cost 1,725 rpm 120 volt was easier choice.
So looking at you look the extra time taken to chance the speed.

Dave

 

[markba633csi]

Phil: You need the console to control it- it uses the com port which is a digital interface
This box is actually a VFD unlike many treadmills this one is for a 3-phase motor rather than DC
From the little looking I did online these are not that reliable

 

[lordbeezer]

Yes treadmill had a 3 phase motor. Found 3or 4 medical or commercial treadmills with 3 phase. Few more commercial with large dc motors. Might try one of those. Thanks for info.

 

[PNW_Guy]

It's an interesting VFD. 110v input but the output voltage is not stated. You'll need to find a manual for it, You have the make and model so that could be easy.

My guess on the wiring is that there would be a low voltage (5?) DC signal feeding a potentiometer. The control box will use the returned voltage to set the frequency and voltage of the output to the motor. You may not need the control panel. It would be helpful if you had the original motor as well.

It could be a good choice for a smallish drill press.

 

[lordbeezer]

I’ll look later but best I remember it had a 2 or 4 hp 3 phase motor. A.O smith

 

[PNW_Guy]

I’ll look later but best I remember it had a 2 or 4 hp 3 phase motor. A.O smith

It has 120v input to the VFD. 2-3hp would be close to the maximum you could get from a 20 amp 120v circuit.
Usually motors that size run on 240v.

I can't think of many stationary power tools over 1 1/2 hp that run on 120v. Big woodworking routers are one o the few exceptions I can think of. And of course the infamous Craftsman "5 horsepower" ShopVac. LOL.

 

[lordbeezer]

Not a working treadmill might be why I got a $3000 treadmill free. I bought couple vfd’s before I had a clue. Not that I do now. 10-15 years ago on the Toshiba. 5-6 on the lenze.480v 3phase in and out. Live and hopefully learn.

 

[lordbeezer]

Disregard last picture