8mm Forum: Elmo ST1200 HD Optical Assy

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Topic: Elmo ST1200 HD Optical Assy

Tony Stucchio
Jedi Master Film Handler

Posts: 625
From: New Jersey
Registered: Dec 2005

posted April 27, 2011 06:20 PM

Does anyone know if the Elmo ST1200 HD Optical Assy is the same as the 1200 and 1200D? I was curious if I could remove one from a 1200 and put it in an HD.

The Optical Assy includes the shutter/cam, claw, lens holder, etc. and can be easily removed. The only trick is removing the solenoid that releases the lock during auto-threading.

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Tony Stucchio
Jedi Master Film Handler

Posts: 625
From: New Jersey
Registered: Dec 2005

posted May 05, 2011 06:16 PM

bump

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Steve Klare
Film Guy

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

posted May 05, 2011 06:38 PM

Tony,

My first answer is "I dunno" as far as swapping in the optical assembly.

Then I'll answer your question with a question: (-assuming you are trying to add optical sound to a magnetic only machine)

Does the sound board on a ST-1200HD (M) accept input from an optical sound pickup? I would imagine that even if it's the same printed circuit board Elmo would depopulate the components that were only needed for optical sound (including the M/O switch) for the "M" only version.

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

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Tony Stucchio
Jedi Master Film Handler

Posts: 625
From: New Jersey
Registered: Dec 2005

posted May 06, 2011 05:39 PM

Thanks for the response, Steve.

The optical assy is a term I picked up from one of the service manuals. It has nothing to do with optical sound. On the ST1200 HD, it is a removable component that contains the shutter, claw, worm gear, and lens/gate assembly. I'm interested in knowing which Elmo parts can mix and match so I can build a good machine out of one or more disabled machines.

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Steve Klare
Film Guy

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

posted May 06, 2011 11:10 PM

I've always been reluctant to mess around with the claw, since from what i've heard there are critical adjustments that I don't know how to make.

-doesn't mean it's impossible: just something I personally avoid...

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

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Tony Stucchio
Jedi Master Film Handler

Posts: 625
From: New Jersey
Registered: Dec 2005

posted May 08, 2011 12:20 PM

Actually, you don't need to touch the claw if you remove the entire optical assy as one piece.

If you get a side-to-side jitter, then the claw needs to be adjusted. It's quite simple if you remove the optical assy. I made the mistake of trying to adjust the claw without doing that and it is nearly impossible. I lived for years with side-to-side jitter (but it only occurred on a small % of my films), until I adjusted the claw.

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