8mm Forum: Elmo GS 1200: Problem with take-up reel

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Topic: Elmo GS 1200: Problem with take-up reel

Rene Ruppert
Junior
Posts: 22
From: Mainz, Germany
Registered: May 2016

posted August 18, 2019 05:18 AM

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Hello everyone,

since yesterday I’m a lucky owner of an Elmo GS 1200. The machine runs very good with one exception: The reel on the take-up arm has problems to roll up the film as the reel does not turn smoothly as soon as the film is taken up by the reel. It seems that the reel holder lacks power, but it can turn a full 1200ft. reel. The problem only turns up when the film is threaded.
The belt in the arm and the gear inside the projector seem to be o.k. I’ve read in this forum that this problem may be related to the brushes in the motor or to the main relays. In this case I’m out and the machine needs an expert. Does anyone have an idea what can cause the “stuttering” of the reel? Otherwise I will a visit to a professional workshop.

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Paul Browning
Phenomenal Film Handler

Posts: 1006
From: West Midlands United Kingdom
Registered: Aug 2011

posted August 18, 2019 05:53 AM

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Hi Rene, The gs has a small helical gear at the base of the arm for takeup, just check this has not split. This will need you to take the back off ( disconnect from the mains supply first) and look to the base of the arm, turn slowly and check that small gear attached in the train of gears, these are known to split so the space between teeth becomes wider in one place, this may be your problem. I had some made from brass, I have some spares if you need one.

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Rene Ruppert
Junior
Posts: 22
From: Mainz, Germany
Registered: May 2016

posted August 18, 2019 06:06 AM

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Hi Paul,
Thank you for the tip! I'll check this.

Update:
It is very difficult to see this gear without removing the motor unit (I tried, but it's stuck between other parts). I tried a dental mirror and the gear seemed to be fine, but I cannot say for sure. Is there another way to check the helical gear?

When I tested the projector yesterday the take-up reel didn't turn at all first. It has gotten better, probably the machine has not been used for a long time.

[ August 18, 2019, 08:06 AM: Message edited by: Rene Ruppert ]

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Paul Browning
Phenomenal Film Handler

Posts: 1006
From: West Midlands United Kingdom
Registered: Aug 2011

posted August 18, 2019 08:27 AM

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Hi Rene, Its a bit tricky getting it out, but be careful not to loose the screws inside the machine, its a maze, and they get lost !!!!!!. Its a common problem on the gs, so its worth checking closely, one small split will make the pitch between teeth wider, so it will have the effect of running a bit odd.

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Leon Norris
Jedi Master Film Handler

Posts: 958
From: Elkins Park, PA, USA
Registered: Jun 2012

posted August 18, 2019 09:31 AM

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Rene, It could be one of these problems! 1- the motor. 2- the constant voltage control board. 3- gear 1 on the motor. Try check to see what one is the problem! Let me know I have all of these parts in stock! Leon.

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Rene Ruppert
Junior
Posts: 22
From: Mainz, Germany
Registered: May 2016

posted August 18, 2019 09:55 AM

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Thanks, Paul and Leon, you're right: The little gear is broken.

Small cause, big effect (if this is the only problem - you never know). To get a spare part would be great.
Frankly, after removing the motor I'm deperately trying to get it back in its place without removing the transformator. This is hell! [Eek!]

[Eek!]

Update: The motor is back where it belongs - good to have the service manual on this board.

Thanks Paul and Leon for your help!

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Leon Norris
Jedi Master Film Handler

Posts: 958
From: Elkins Park, PA, USA
Registered: Jun 2012

posted August 18, 2019 10:47 AM

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That's good news Rene! Good luck!

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Steven J Kirk
Jedi Master Film Handler

Posts: 873
From: Southern England
Registered: Apr 2008

posted August 18, 2019 01:30 PM

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This is the Van Eck one on eBay:

https://www.ebay.co.uk/itm/ELMO-GS-1200-gear-for-coil-arm-PP-0036-Van-Eck-new/261856566013?hash=item3cf7de1afd:g:0TgAAOSwd7Fb2szm

--------------------
VistaVision
Motion Picture High-Fidelity

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Rene Ruppert
Junior
Posts: 22
From: Mainz, Germany
Registered: May 2016

posted August 18, 2019 01:46 PM

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Thank you! Great that these parts are available.

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Leon Norris
Jedi Master Film Handler

Posts: 958
From: Elkins Park, PA, USA
Registered: Jun 2012

posted August 21, 2019 10:44 AM

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One good thing adout that gear. It takes a lot of abuse! And last for years! The all brass one is the one to get! It will last forever! Elmo called this gear. Gear 1.

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Leon Norris
Jedi Master Film Handler

Posts: 958
From: Elkins Park, PA, USA
Registered: Jun 2012

posted August 22, 2019 12:40 PM

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These machines are getting old now and there parts are starting to go! Thank god that parts are still available!

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Rene Ruppert
Junior
Posts: 22
From: Mainz, Germany
Registered: May 2016

posted August 22, 2019 01:03 PM

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Leon, I ordered the plastic gear and hope it lasts for many years.
Yes, these machines are getting old now. I know - I'm about the same age. ;-)

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Leon Norris
Jedi Master Film Handler

Posts: 958
From: Elkins Park, PA, USA
Registered: Jun 2012

posted August 22, 2019 01:07 PM

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Rene, if you have to order again get the all brass one it will last forever!

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Rene Ruppert
Junior
Posts: 22
From: Mainz, Germany
Registered: May 2016

posted August 26, 2019 03:26 PM

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After installing the new gear everything works great.
Thanks again for your great help!

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Leon Norris
Jedi Master Film Handler

Posts: 958
From: Elkins Park, PA, USA
Registered: Jun 2012

posted August 27, 2019 10:57 AM

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Good luck Rene! Enjoy!

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