lathe tripping after quarter turn on startup ? | on ElectriciansForums

Discuss lathe tripping after quarter turn on startup ? in the UK Electrical Forum area at ElectriciansForums.net

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Guys / Girls , i have been asked to go and replace a light fitting tomorrow in a domestic environment and only have an hour window to get it fitted.
Customer has asked it i can take a look at his single phase lathe whilst there. Because of the time frame i wont have long to try and diagnose the issue.
he says he starts it up, it does a quarter turn then trips out , any suggestion as to where to start the testing process and what it could likely be ?
I know its a very open ended question but any suggestion may get me to diagnose within the time period i have.
Thanks in advance
 
Check is spins freely first if all to rule out mechanical issues.
Check the capacitor/capacitors for run/run-start. Usually they budge and leak when they fail but not always so may require further testing.
Look to see if it was always a single phase lathe or a conversion from 3phase
are the capacitors generally the common issue ?
 
are the capacitors generally the common issue ?
IF nothing else has changed and it has been working where its sited it would be where I would start, depending on the motor it might have 1 or 2 capacitors, if there is 2 there will be a centrifugal switch in the motor which is used to switch from the start cap to the run cam
 
IF nothing else has changed and it has been working where its sited it would be where I would start, depending on the motor it might have 1 or 2 capacitors, if there is 2 there will be a centrifugal switch in the motor which is used to switch from the start cap to the run cam
Thanks for the advice , very helpful.
 

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