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Old 14th May 2017, 10:12 AM
John King John King is offline
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Join Date: Nov 2012
Location: County Durham
Posts: 3,319
Default OM10 wind/rewind

I do not think that the camera has a clutch, the wind on is controlled by gears not a clutch and it may be one or more of the gear teeth have been stripped off the cogs.

The rewinding is allowed by pressing or releasing some sort of button or switch on the exterior of the camera which disengages the gear teeth by pusing one of the gears out of alignment, so allowing the rewind to be operated. The 1st time the wind on lever is operated this re-engages the teeth of all the gears. A clutch by definition is two non slipping surfaces pressed hard together. Apart from a device called a 'dog-clutch' where there is one coarse tooth which engages with a recess in an adjoining part of the mechanism - in fact a very coarse gear tooth. If the OM10 has one (which I doubt) it will be very much stronger and robust that the teeth of the actual gears.

There is no mechanical or other link to the rewind knob or handle apart from the film. When we see it rotate during film winding, it is the film being pulled through from the cassette and the central spool in the cassette is engaged by the two 'teeth' for want of a better word on the underside of the rewind knob which causes it to rotate. Only very very rarely does this cause any problems.

If the film counter continues to add up/count down and the shutter to cock, with every exposure, but the film does not advance then it is a fault within the wind-on gears which is either one of three possible circumstances. The teeth on one or both cogs have stripped or for some reason have become disengaged or the rewind has not engaged fully after the last film was rewound..

Probably it could be repaired but would more than likely cost more than a replacement OM10. You have little to loose, open it up and let us know what you find.

Last edited by John King; 14th May 2017 at 10:28 AM.
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