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Colin Rutter

AR XB motor voltage

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Whilst finishing of the new XB I noticed the motor is a 115 volt 60hz unit

Obviously the pulley has been changed to accomodate our 50hz

but no attenuation of the voltage so I checked its temperature with my thermocouple (thumb and fore finger) and it was running hot

So attenuated it down to 130 volts and now not to hot. 

I wonder why they didn't do it in the first place. 

A two watt resistor is hardly a huge impact in the BOM. 😁

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Interesting 

The motor on mine has been wrongly wired it looks like a mix of the diagrams 

It is wired with the two whites across the capacitor with the non mains side going to a winding (red)  and the other winding ( green) going to neutral 

Obviously  the windings need to be in series for 240v and parallel for 110v.

Rather than rewire as the motor runs really smoothly and does not heat up I shall leave it as it is

Thanks for the info. 

Actually looking again it was wired for 115volt it just had one wiring "reversed" which would make no difference with a synchronous AC motor. 

Of course running on 240v would draw twice as much current and produce lots of waste heat.

 

 

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Well after checking everything again it was a faulty start capacitor that was causing the over heating (it measured fine) I had replaced it as a matter of course. 

I have returned it to run on 240 volts and all is good. 

I have also drilled out the motor mounting tapped holes and screwed it down with M3 screws and nuts. 

This had definitely reduced motor vibes and they are now inaudible 😀

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8 minutes ago, Colin Rutter said:

Well after checking everything again it was a faulty start capacitor that was causing the over heating (it measured fine) I had replaced it as a matter of course. 

I have returned it to run on 240 volts and all is good. 

I have also drilled out the motor mounting tapped holes and screwed it down with M3 screws and nuts. 

This had definitely reduced motor vibes and they are now inaudible 😀

good stuff.  Enjoy

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btw.  Do you know the trick of putting talc on the belt to reduce suspension wobble at start-up?  Seems silly, but you want the belt to slip a bit like a clutch, then it will start up smoothly.

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