I have a small lathe with forward and and reverse switch. Big problem is that I had to remove the 220V single phase motor from the lathe for transporting and I have lost the photo I took of the wiring hook up.
on your motor data plate there should be a diagram of what wires go together for the rotation. if you trace those connections back to the switch end of the cable, you might be able to figure out the hook up.
Trace continuity between hot, neutral, B1, R1, B2, R2 for each switch position (fwd, off, rev).
I would start with the thesis that R1 and B1 are U1 and V1, and R2 is Z2-W2, and B2 is U2. If that doesn't map correctly, try other options or post your readings.
I tried the hook up you suggested but only got one direction to run. IE forward position - rotation at correct speed. Opposite or reverse position - no rotation.
Below are meter readings when switch was in 'forward and reverse' positions.
I did tie one red and black together before I shipped the machine home. So referring to R1, B1 and R2, B2 is ok.
When the switch was in 'Forward' position r1,b1 had 240 volts across them. r1,r2 240 volts, - r1,b2 0 volts, r2b1 0 volts, - r2b2 240 volts, b1b2 240 volts
When switch was in 'reverse' position the readings were:
r1,b1 had 0 volts across them. r1,r2 240 volts, - r1,b2 240 volts, r2b1 240 volts, - r2b2 0 volts, b1b2 240 volts.
Looks to me that Z1W1 and V2 are unused. Can you confirm this? You only have 4 wires so we have to assume a pair aren't used unless you had some jumpers installed somewhere.
For the motor to turn CW (clockwise) you need:
L1 -> U1+V1
L2 -> U2+Z2
For the motor to turn CCW you need:
L1 -> U1+Z2
L2 -> U2+V1
So basically all you are doing is reversing L1 and L2 (the mains) between V1 and Z2 to reverse the motor. U1 and U2 always stay the same. You need to determine which wires from the switch have L1 and L2 when the switch is in the forward reverse positions. I would measure this WITHOUT them connected to the motor. Alternatively you may just check them for continuity with the line input wires with the mains disconnected of course!
The motor wiring is pretty simple but until you provide us with the switch wiring details all we can do is make assumptions on how to wire the switch to it.
Here's what I think the switch looks like. You need to label the output wires with the appropriate labels. If we know which outputs are R1, R2, B1, and B2 I believe we can get you wired up.
terminal Z1W1 has three wires from motor. Blue, Black and White
terminal V! two wires Yellow and White
terminal U1 one wire Red
terminal Z2W2 one wire Blue
terminal U2 one wire Red
terminal V2 two wires Yellow and Blue