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Help with motor from old grain mill
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<blockquote data-quote="Baffledron" data-source="post: 523682" data-attributes="member: 34652"><p>Brilliant, we're getting somewhere...thanks.</p><p></p><p>Yesterday I measured the winding resistance using my general purpose multimeter, it's not an Avo but it is good enough to give a rough idea of the values. Sketch of what I found out as attachment below.</p><p></p><p>Definitely single phase with split phase starter windings. Probably dual voltage...could that be 230v (main windings in parallel)and the old 2 phase 460v (main windings in series)?</p><p></p><p>Now emboldened, I connected it all up and powered it up....initially nothing. Then spun the motor by hand and applied power...it worked. Stop then start again, all working fine. Possibly initial reluctance to start was the centrifugal switch sticking?</p><p></p><p>Stopped and started a few more times... all working, you can hear the centrifugal switch working just after power is applied. Left it running for half an hour, stop then start....all working.</p><p></p><p>At some point in the future it might be an idea to take the fan and end casing off to inspect the centrifugal switch but the aluminium fan is well stuck (and keyed) to the shaft and will need a puller on it to get it off....but that's for another day. </p><p>As a work around, there is a hole (drainage/ventilation?) in the underside of the end aluminium casing, I imagine this void is where the centrifugal switch is. So I used this hole to spray contact cleaner in hoping that it'll get to the centrifugal switch...we'll see!!</p><p></p><p>Many thanks</p><p></p><p>Ron [ATTACH=full]13292[/ATTACH]</p></blockquote><p></p>
[QUOTE="Baffledron, post: 523682, member: 34652"] Brilliant, we're getting somewhere...thanks. Yesterday I measured the winding resistance using my general purpose multimeter, it's not an Avo but it is good enough to give a rough idea of the values. Sketch of what I found out as attachment below. Definitely single phase with split phase starter windings. Probably dual voltage...could that be 230v (main windings in parallel)and the old 2 phase 460v (main windings in series)? Now emboldened, I connected it all up and powered it up....initially nothing. Then spun the motor by hand and applied power...it worked. Stop then start again, all working fine. Possibly initial reluctance to start was the centrifugal switch sticking? Stopped and started a few more times... all working, you can hear the centrifugal switch working just after power is applied. Left it running for half an hour, stop then start....all working. At some point in the future it might be an idea to take the fan and end casing off to inspect the centrifugal switch but the aluminium fan is well stuck (and keyed) to the shaft and will need a puller on it to get it off....but that's for another day. As a work around, there is a hole (drainage/ventilation?) in the underside of the end aluminium casing, I imagine this void is where the centrifugal switch is. So I used this hole to spray contact cleaner in hoping that it'll get to the centrifugal switch...we'll see!! Many thanks Ron [ATTACH type="full"]13292[/ATTACH] [/QUOTE]
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Help with motor from old grain mill
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