crompton motor and dewhurst switch problems

[mike smith 5Participant @mikesmith5]

I've got the wiring diagram for the Dewhurst switch to the Crompton motor , I have followed the diagram and this is how it is wired.This is where the problems start ; in forward the motor runs rough and not up to speed,in reverse it trips the power.I had the motor off a friend, he had never bothered with reverse and it was wired up diect to a NVR switch and runs sweet in forward and up to speed. That was connected to AZ and A.I think the problem is that the wires in the motor connection block have been moved about because there are no jumpers to make it run direct from a plug, here is a photo of the motor connection block

wires coming out of the motor housing to the connection block are as follows; 2 red to AZ

red and black to T

black to A

black to Z

capacitor to A and Z

hope you can help as i'm pulling my hair out

many thanks, mike

 

Edited By JasonB on 23/10/2013 18:29:15

[mike smith 5Participant @mikesmith5]

[petejchadwick@gmail.comParticipant @petejchadwickgmail-com]

Hi folks, I digitised a similar design for my own use today with my Myford Super 7 and thought others might benefit from having a copy themselves. Feel free to print out.

NOTE – A safety switch is highly advised between the AC supply and the Dewhurst switch. And depending on how you are mounting the switch and to what surface, it may well be worth adding an additional ground point as illustrated, too many grounds can never really hurt.

 

 

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