Wiring Nightmare

[Brad93]

Anyway in there this should still work. I've got nothing. So something is possibly wired up wrong on the switch

 

[Brad93]

This is where it's difficult as the drawing has numbers and the switch I have is pre wired with letters

So I need to now sit here and continuity test the switch to figure out what's. Or, buy a new switch

 

[Guineafowl]

I’ve printed the diagram and had a quick look. Hopefully will have more time later.

The left-hand motor is most likely a split-phase (resistance start) induction motor. No capacitor; the start winding usually has higher resistance/lower reactance and so the current through it leads that through the run winding.

C and R look like lamps. I don’t know why they’re drawn like that, but in any case wouldn’t affect the motor running even if they were other components.

The switch to the left of C and R is a reversing switch that appears to work only when the main motor is running.

 

[Brad93]

Uploading video to YouTube now. I've rewired the switch and have some progress - but I have no torque when reversing the motor - it just hums. Reversing the brown and blue cables to the motor reverses the direction (but the switch still only works when turned one way)

 

[Guineafowl]

Uploading video to YouTube now. I've rewired the switch and have some progress - but I have no torque when reversing the motor - it just hums. Reversing the brown and blue cables to the motor reverses the direction (but the switch still only works when turned one way)

In both switch states, the left-hand winding has L1 top and N bottom.

Down - both windings are as above.

Up - the right-hand winding has N top and L1 bottom.

 

[Brad93]

Reversing the windings makes no difference / the phenomenon remains the same - runs one way, hums the other way

 

[Brad93]

In both switch states, the left-hand winding has L1 top and N bottom.

Down - both windings are as above.

Up - the right-hand winding has N top and L1 bottom.

Would you say, as they've drawn it, the left hand winding should be the one with higher resistance?

 

[Brad93]

The Machine is a crypto peerless - I will try via computer tonight to get a higher quality image of the wiring diagran

 

[Guineafowl]

Reversing the windings makes no difference / the phenomenon remains the same - runs one way, hums the other way

There are quite a few links between the switch terminals - could the rats have chewed one away?

Would you say, as they've drawn it, the left hand winding should be the one with higher resistance?

Yes, I think so.

 

[Brad93]

This is the motor in question

 

[Brad93]

 

[Brad93]

There are quite a few links between the switch terminals - could the rats have chewed one away?

Yes, I think so.

I've replaced every single wire now

 

[Guineafowl]

I've replaced every single wire now

By making your own connections, you can reverse the motor normally?

If so, it must be a missing wire (or one broken internally), or maybe a burnt switch contact.

For belt and braces I’d be checking the timer relay function (looks to be normally closed) and the limit switches. Can’t be much else.

 

[m_c]

You've proven that the motor runs both ways, so it can only be a wiring/switch issue, but I'd probably go for a switch issue.

Have you checked both coils are getting power when the switch is activated?