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Post by mattsedgley on Sept 1, 2009 22:46:01 GMT
Now... I was playing with my cars tonight.. as i do.. sit at the table make make formula one sounds with them etc etc... anyway I got thinking about motors.. I was under the impression that you could test a motors resistance to know what winding it was? Correct? EG a 21.5 would have more resistance 'cause there's more wire in there than a 3.5 for example, or vice versa whichever way round it goes.. Now.. I'm not exactly the stupidest tool in the draw - but I couldn't for the life of me get a resistance, or any other reading for that matter from the motor other than when spinning the rotor which gave a voltage read out just like an alternator would, which for obvious reasons couldn't be used to tell the difference between the windings! So here comes the challenge.. I challenge you to show me how you tell the difference between one motor and another motor using only a Multimeter! Matt (Confused, puzzled, and not looking forward to the first day of school tomorrow)
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Post by mark robinson on Sept 2, 2009 6:22:47 GMT
Whats the prize if I can tell you? ;D
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Post by Jazzler on Sept 2, 2009 6:42:36 GMT
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Post by mattsedgley on Sept 2, 2009 15:54:52 GMT
MJR - You'll have to wait and see!
Jazzler - agreed you seem to have found a solution,
Perhaps let me re-phrase my question slightly - according to an event organiser it is possible to check what motor wind is being run simply, with just a multimeter, it's quick and simple enough to do track side, at an SLCC for example - particularly in a case such as when MH was accused of cheating at Aldershot....
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Post by gwesty on Sept 2, 2009 17:48:08 GMT
the rotors are colour coded , three screws and the rotors out so u can measure the "stack"
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Post by keitheroonie on Sept 4, 2009 17:56:06 GMT
MJR - You'll have to wait and see! Jazzler - agreed you seem to have found a solution, Perhaps let me re-phrase my question slightly - according to an event organiser it is possible to check what motor wind is being run simply, with just a multimeter, it's quick and simple enough to do track side, at an SLCC for example - particularly in a case such as when MH was accused of cheating at Aldershot.... I would be very surprised if you were able to test the windings of a motor trackside, yes you should be able use a low reading ohmmeter to test the windings of a motor off the car but connect it to a speedo and you've then got to take in to account the internal resistance of that particular speedo, 2 parallel resistances would give you a lower reading than just the motor alone. I've got a low reading ohmmeter if you wanted a play one day
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Post by mattsedgley on Sept 4, 2009 18:35:39 GMT
So how would Mr Newton Test a motor at a meeting??
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