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Tractorfan · 29th Aug 2017, 8:22 pm

Hi,
Today I replaced the seven tantalum caps on the motor control board with electrolytic caps to see if that made any difference (it didn't).
However, I did notice that the motor would start when the rotor was at rest in certain points of its rotation, but not in others. This implies to me that the commutating part is not giving a reliable contact at all points of its rotation. If you follow my point.
So, the next tack is to whip out the motor and have a squint inside it.
Cheers, Pete.

29th Aug 2017, 8:22 pm	#12
Tractorfan Dekatron Join Date: Mar 2008 Location: St. Frajou, l'Isle en Dodon, Haute Garonne, France.(Previously: Ellesmere Port, Cheshire, UK.) Posts: 3,184	Re: Old Uher 4000 motor problem. Hi, Today I replaced the seven tantalum caps on the motor control board with electrolytic caps to see if that made any difference (it didn't). However, I did notice that the motor would start when the rotor was at rest in certain points of its rotation, but not in others. This implies to me that the commutating part is not giving a reliable contact at all points of its rotation. If you follow my point. So, the next tack is to whip out the motor and have a squint inside it. Cheers, Pete. __________________ "Hello?, Yes, I'm on the train, I might lose the signal soon as we're just going into a tunn..."