8mm Forum: B&H variation problem

This is topic B&H variation problem in forum 16mm Forum at 8mm Forum.

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Posted by Dan Caprio (Member # 561) on February 17, 2006, 03:58 PM:

Hello I have a B&H 535 16mm projector that has recently started to act up.Picked it up on Ebay in like new condition. Ran fine for a few days and now The motor speed slows down quite a bit for about a minute or so then picks back up to normal running speed and then after awhile it does it again. Is it the motor or something else before I tear into it. I have a few part machines. thanks Dan

Posted by John Whittle (Member # 22) on February 17, 2006, 08:29 PM:

Dan

Can you hear a speed change in the motor (not just the projector mechanism)? If the motor stays on speed, check the belt for slippage or dirt. If the motor is dipping, then replace the motor. The US machines I think were all induction motors so it would sound like an internal wiring problem. If it isn't, then it's a speed control board problem but I thought those motors were only used in the US on the Marc300 machines. The international machines had motor speed control boards since they were set for various voltages so if it's one of those, that might be the source of the trouble.

John

Posted by Dan Caprio (Member # 561) on February 18, 2006, 09:48 AM:

Thanks for the reply John it was just the small belt attatched to the motor flywheel that was slipping badly. I replaced it with an older one and it runs fine. I think Larry has replacemnt belts for this model will check out his web site thanks again! Dan

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