cartridge locking in canon

[Mr Blackstock]

Since most use canons i hope that someone may help me. I picked up a canon zoom 318 for a few dollars, everything seems fine on the outside. However, any cartridge i put in refuses to roll, the motor cannot turn it.

I then got a dummy cartridge(film having being removed) and it works fine. Just not when i put a fresh cartridge in.

I examined it carefully without taking it apart, and everything seems to be doing it's job. Do these motors loose umph?

Also, it is in pretty immaculate condition.
Any ideas?

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[mattias]

the film is actually moved by the pulldown claw and not by the turning wheel. is it really moving the way it should?

/matt

[Mr Blackstock]

Yeah the claw works, just as i suppose it should, thats what i cannot work out, the camera appears immaculate. I have tried two cartridges, and a dummy. It definetely will not pull film.

I'm stumped

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