Re: 4 Wire DC motor - Treadmill motor, the BLUE wire

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "volitan712003" <volitan@o...>
wrote:

> Hello,
>
> I just received a 2hp treadmill motor to use as a spindle motor for a
> small lathe. It has 4 wires coming out of it. Red and Black (I know
> what those are), and two blue wires. The blue ones have a male and
> female connector already put on them, as if they plug in together.
>
> Anyone know what those two are for?
>
> Thanks,
> David

Hi David,

In my motor, there are two blue wires that are connected to a thermal
switch inside of the motor. check to see if the continunity is 0.

in my case, the 110VAC passes the circuit breaker and switch, then
goes into the blue wire, then back to the controller board.

if you have one of those 4 inch square SCR boards, it should have a
10k pot connection, 2 AC wire inputs and 2 outputs.

those outputs are to run the motor.

I've scrapped every logic board (the one the runner pushed button on)
and from what I can gather, the feedback of speed is read from either
an encoder or a magnet in the drive pulley. I don't know if the
feedback also is used to maintain speed, but I would think it would be
used in that manner.

Bottom line, the blue wires *probably* can be bypassed, but I chose to
leave them there in case the motor gets hot.

Dave