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  • The problem is that there are probably 8 or more different ways to hook up a drum switch to a single phase motor- many kinds of winding configurations etc- thats why pics are so important. Yes, once its clear what windings the motor is set up with then the hookup will known right away. Pics and preferably nameplate info from the motor, and/or pics of the wiring really is the 1st necessary step.

    Setting the voltage primarily affects the HP you can get out of the motor- it will still run at the same speed (being a function of the windings and line freq)- not like a DC motor.

    South Bend published a sheet or two showing the different typical single phase drum switch setups, google will probably find it. It might be obvious which of the winding configurations your motor is set up with, and then it'll show you how to hook it up.


    Regards,

    Greg
    Hi Ian,

    Its often unclear which posts will get responses and which won't. On the antique machinery forum its more likely you'll get a response if the lathe and/or motor are themselves antiques. If you're talking about a single phase motor then pics wrt the leads and the drum switch wiring will be helpful- there are quite a few different ways that can be arranged.

    Regards,

    Greg
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