8mm Forum: Image Shake - Elmo Projector

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Topic: Image Shake - Elmo Projector

James Romero
Film Handler

Posts: 81
From: Valencia, CA, USA
Registered: Aug 2010

posted May 20, 2012 11:58 PM

Can anyone tell me why sometimes I experience image shake from time to time in only my Elmo projectors (1200HD ...1200D and ST-180) ... but in my Eumig (710D) I don't...even when projecting the same film? The image will be steady one minute then shake ... then stabilize again. I'm puzzled! Anyone else experience a similar problem with Elmos?

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Winbert Hutahaean
Film God

Posts: 5468
From: Nouméa, New Caledonia
Registered: Jun 2003

posted May 21, 2012 07:07 AM

It can be because the films are dry (need lubriation). As far as I know, Elmo is very sensitive with dry films.

I have this very same case, and when I move the shaky film to Chinon which has a plastic gate (instead of the metal as in Elmo) the film is very stable. Even for a warp film because of vinegar syndrom.

So perhaps the answer is because the gate between Elmo and Eumig is different.

--------------------
Winbert

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Hugh Thompson Scott
Film God

Posts: 3063
From: Gt. Clifton,Cumbria,England
Registered: Jan 2012

posted May 21, 2012 10:48 AM

Depending on the age of the machines,meaning have they had a lot of use,if the problem isn't rectified by lubrication of the film,then it could
be the metal guides either side of the back plate film path.One
of them is spring loaded and the other fixed.In time these guides
do get worn and grooves do appear in them and with various thicknesses of film, acetate and polyester,one might project better
than the other reg. screen steadiness.There are two small screws
to each plate,remove them,and unclip the spring on the other one.On examination you'll find liitle notches have been worn
into the metal,these can be rubbed out either on a fine oil stone
or some fine carbide paper known in the UK as " Wet and Dry".
After they have been rubbed,give them a quick polish on a
piece of cloth and re install them.You may have to adjust the
outer plate until it just frames your picture and does'nt have
the sprocket hole in frame.This should give a nice rock steady
image.

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Hugh Thompson Scott
Film God

Posts: 3063
From: Gt. Clifton,Cumbria,England
Registered: Jan 2012

posted May 21, 2012 05:53 PM

As a post script,have a look at the snubber roller located below the sound deck, when the machine is running,if the roller dips and the
film starts to jump it might be the tension needs adjusting on the
spring which is easily done by just loosening the screw and a
slight pull on the clip holding the spring then retighten screw.

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