OT: Milling machine switch wiring

[Ryan225]

Hi all.

Yesterday x-mas came early. I got some free steel and included in that was a Chinese mini laythe, mill/drillpress combo. Its about 4 foot long. Its green and says star on it. It was manufactured by Shandong Linyi Machine Tool company, if that helps on the discription any.

Well when I was loading the milling head into the truck, I accidently pulled them power input wire out of the head, the connector must have been loose because it didnt break or anything, just slipped out of its connectors. Well I am trying to connect it back in, I have found that it wires into the switch. The switch has 3 connectors on each side of it. The I have two wires coming out the switch on one side, a red wire and a green wire. The power input wire has a blue wire and a black wire.

Would it be safe to assume the black wire goes on the opposing connector on the other side of the switch from the red wire, and likewise with the blue and green wire? This is a 110v system by the way.

Any help would be appreciated.
-Ryan

[TOMWELDS]

Ring the switch out with an ohm meter.

[Terry Lingle]

there should be a wiring diagram inside a cover somewhere that should solve your problem.
where do the other end of the wires go motor,power input or to a contactor?

Before you start guessing draw a diagram of the switch and indicate the locations that you think the wires came from so you can return to the start condition if your guess is wrong.

Is the switch a three position reversing switch that powers one of two magnetics to change rotation direction?

We really need more information to make a good guess for you . also a coule of clear pictures will help .
Good luck Terry

[JohnStahlarbeit]

Your best bet is to ask on yahoo's mill_drill group. I don't recognize the mill/drill from your description, but perhaps someone there would. A picture of the font of the mill would help identify it.

Good luck.

John

[Ryan225]

I dont have a digital camera to where i can readily take pics and upload them. I apologize. However, I did find a picture of the exact same setup I have, only difference that I can see in the picture is that the belt drive is different on the back of the lathe.

The on/off switch is on the milling head, the red and green buttons. As for the red and green wires I mentioned earlier that go into the machine, from what I can tell they go into the electric motor.

[Terry Lingle]

If Your machine is similiar to that one and the switch is the one shown it drives the mill spindle motor. That motor only rotates one way so it is an on off switch not a reversing switch

since it is a 120 volt machine with only two wires going to the motor all you need to do is push the on button on tnat switch and use an ohmmeter to find out which two remaining terminals now connect to the motor wires.

The only issue left is determining which wire connects to neutral. Here as this is internal wiring from a totaly different code jurisdiction you can not assume that green or blue is neutral and red or black is hot. You can use an ohmmeter to determine which input wire connects to the small blade on the plug. that wire should be concidered the hot wire. I would connect it to the switch terminal that ends up on the red wire to the motor.
As a final clue when you lay the wires into place there will be one way that they want to line up properly and one way that they do not the natural way is probably how they were originally connected.

One final thought I suspect that this is a used machine. It may have a failed motor and the loose wires could be from the previous owner 's troubleshooting Good luch terry