Author
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Topic: GS 1200 MAIN MOTORS
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Bill Parsons
Film Handler
Posts: 66
From: Brookland. UK
Registered: Jul 2004
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posted August 29, 2004 01:09 PM
I have had an email from Kevin asking about GS1200 main motors, thought I would share the reply with everyone, there is a small UK company that can rewind these motors, (F.W. MASON. In Matlock, Tel:- 01629 650738)cost about £85. I have fitted one of these and it seems fine, I can not claim the credit for finding this company, it was discovered by Simon McConway. One other point worth a mention with these motors, if you dismantle the motor you will find a ring of resistors between the windings, these should be over 1meg ohm each, they tend to reduce in value or sometimes virtually short out, causing the motor to behave erratically these resistors can be removed without any problem they are there to suppress interference on the audio (crackle) but I have never noticed any problem after removing them. But ONLY remove them if you have problems with the motor.
Bill.
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Bill Parsons
Film Handler
Posts: 66
From: Brookland. UK
Registered: Jul 2004
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posted September 01, 2004 01:18 PM
John, your motor is beyond first aid, but could be rewound, I have spoken to the chap today, the cost is now £95 + VAT but it is still worth it so you have a spare to keep the projector running. I think we should support this chap, he is the only one I have come across willing to repair a small dc motor, unless anyone else knows any different?
Tony, The running voltage of the motor will of course depend on what speed you are running at and where the variable control is set, but on average about 24.2v for 24fps and 19v for 18fps, this will vary a bit from one machine to another, but a new motor would need to be rated at over 24v as some people run at 25fps. The amount of revs of the motor would be hard to calculate but I think I could mod the control circuit to match the motor, the built in servo/tacho coil is 170ohm. Believe me it is not an easy motor to find a match for, I have spent many hours searching!
Bill. [ September 01, 2004, 02:26 PM: Message edited by: Bill Parsons ]
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