8mm Forum: GS1200 Rewind Motors Video

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Topic: GS1200 Rewind Motors Video

Graham Ritchie
Film God

Posts: 4001
From: New Zealand
Registered: Feb 2006

posted March 19, 2018 12:20 AM

Well here is a short video I made today regarding those motors [Wink]

https://vimeo.com/260705521

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Alan Gouger
Master Film Handler

Posts: 451
From: Florida
Registered: Jun 2003

posted March 19, 2018 01:29 AM

Thanks for taking the time to share your technique for cleaning the GS motors. Love the video.

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Graham Ritchie
Film God

Posts: 4001
From: New Zealand
Registered: Feb 2006

posted March 19, 2018 01:34 AM

Thanks Alan

The projector shown was my spare one. Unlike the one I use all the time, this one the motors had never been cleaned.

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Mark Mander
Phenomenal Film Handler

Posts: 1236
From: Dunstable ,Bedfordshire.
Registered: Jan 2005

posted March 19, 2018 02:44 AM

Well done Graham,Great video and a job most can tackle now,Mark

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Elmo GS1200 1.0 lens
Elmo ST1200HD 1.1 lens
Sankyo 800 1.0 lens
Elmo 16CL
Elf NT1

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Antoine Orsero
Master Film Handler

Posts: 374
From: marseille france
Registered: Jun 2003

posted March 19, 2018 05:52 AM

Hi Graham
Thank you very much for these beautiful videos

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Tony

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Alan Rik
Film God

Posts: 2211
From: New York City, NY, USA
Registered: Jun 2003

posted March 19, 2018 07:48 AM

Agreed! The video is very clear and perfectly explained. I never thought of cleaning the motors ever. Your machine sounds nice and quiet. Thank you for posting.

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Joe Taffis
Phenomenal Film Handler

Posts: 1592
From: United States
Registered: Jun 2003

posted March 19, 2018 08:17 AM

Excellent! Thanks Graham [Smile]

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Joe Taffis

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Paul Adsett
Film God

Posts: 5003
From: USA
Registered: Jun 2003

posted March 19, 2018 10:22 AM

Superb video by Graham and hopefully this will be added into the forums technical section.
I cleaned both my GS motors just last week using Graham's previously posted written description of this process. Reason for cleaning was electrical noise from both motors, due to arcing within the motors. Both motors were really filthy inside with carbon dust everywhere. After cleaning up everything inside, the electrical noise has pretty well gone.
One thing I found though was that I could not get the brush assembly back onto the rotor shaft without first totally pulling out the rotor. Graham obviously has the nack of doing it with his toothpick technique. Anyway, I had to totally remove the motor, unbolt it from the mounting bracket, and remove the little pinion gear, in order to get the rotor out. Graham's technique, if you have the dexterity to do it, is a much simpler way of doing it.

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The best of all worlds- 8mm, super 8mm, 9.5mm, and HD Digital Projection,
Elmo GS1200 f1.0 2-blade
Eumig S938 Stereo f1.0 Ektar
Panasonic PT-AE4000U digital pj

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Graham Ritchie
Film God

Posts: 4001
From: New Zealand
Registered: Feb 2006

posted March 19, 2018 01:06 PM

Thanks everyone

Just one thing, if you are going to put a small drop of oil on the back of those motors afterwards, be carefull not to put to much, as if any of it makes it way onto the commutator, in time with wear from those carbon brushes the mix of oil and carbon, could act as a mild sort of cutting compound and increase the speed of wear on the commutator and the brushes running on it.

One other thing with those brushes dont use anything metal on them. I just used the stem of cotton buds to compress them against there springs when sliding the end cover back on.

best of luck [Smile]

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