8mm Forum: ELMO GP Dual 8 Jumpy Image

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Topic: ELMO GP Dual 8 Jumpy Image

Don Elsass
Junior
Posts: 12
From: New Bern, NC, USA
Registered: Jan 2015

posted October 01, 2015 03:47 PM

I can't eliminate the image jumping up and down and it appears to be projecting the image between frames. Is there any other adjustment for this besides the framing lever? Or is there an adjustment for the framing lever? If I run it in reverse, the image stops jumping and it is centered. Could the noisy bearing in my other post be causing this too? I'm new to 8mm and it is very CHALLENGING!

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Steve Klare
Film Guy

Posts: 7016
From: Long Island, NY, USA
Registered: Jun 2003

posted October 01, 2015 04:17 PM

You should have a loop of film above and below the gate so the film is free to bounce under the action of the claw without being pulled taut.

If you look in and don't see (especially) the one under the gate, there should be a lever to kick the film out into a loop. In the Elmos I know, it starts with a pusher which sits right where the film leaves the gate and it pivots on a screw maybe an inch and a half underneath. It will probably be black plastic and meet up with a lever which sits in the side cover when it closes.

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All I ask is a wide screen and a projector to light her by...

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Don Elsass
Junior
Posts: 12
From: New Bern, NC, USA
Registered: Jan 2015

posted October 01, 2015 04:40 PM

Did you see the edit to my post? The image is normal when run in reverse which doesn't use the reel with the bad bearing.

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Janice Glesser
Film Goddess

Posts: 3468
From: Sunnyvale, CA USA
Registered: Sep 2011

posted October 01, 2015 04:41 PM

Also Don...The Elmo GP Series is a dual format projector. Make sure that you have the film format properly selected for the film you are projecting....Standard 8mm or Super 8mm. If you select the wrong format the claw will not synchronize properly with the film sprockets and the image can jump.

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Janice

"I'm having a very good day!"
Richard Dreyfuss - Let It Ride (1989).

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Steve Klare
Film Guy

Posts: 7016
From: Long Island, NY, USA
Registered: Jun 2003

posted October 01, 2015 05:34 PM

I'm with Janice on the correct format. First things first!

If it misbehaves at the same time as the bearing acts up maybe the bearing surfaces are so roughened it's introducing a vibration into the motion of the film.

-Can't have a smooth ride on square tires!

I was thinking about this one today. Is it possible to take the bearing out, flip it upside down and put it back? The surfaces inside the top of the bearing race have never been ground on (gravity...) and should still be brand new.

Anything North of 90 degrees (either direction) from the bottom should be untouched.

[ October 01, 2015, 06:44 PM: Message edited by: Steve Klare ]

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All I ask is a wide screen and a projector to light her by...

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Don Elsass
Junior
Posts: 12
From: New Bern, NC, USA
Registered: Jan 2015

posted October 01, 2015 07:40 PM

It's standard, film date 1947, well before Super was introduced and that's what it is set for (R). I just discovered the cause! There is a slow motion lever on the front of the projector that I didn't know existed. I pushed it down, out of slow motion, and the image is stable. So happy it was so simple. Thanks to all for your suggestions!

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