Author
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Topic: Elmo 1200HD problem
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Rob Young.
Phenomenal Film Handler
Posts: 1633
From: Cheshire, U.K.
Registered: Dec 2003
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posted April 04, 2004 01:53 AM
David, unfortunately this is becoming a common problem on most ST1200HD's, but there is a fix!
I don't believe that the shutter is available anymore unless you are very, very, lucky, so it's a case of fixing the one you've got.
I was warned a few years back that the rubber was decaying on my Elmo and didn't have long to go. Sure enough it soon fell apart, with the projector suddenly sounding like a road drill!
Amazingly, on my machine, I was able to peel away most of it, leaving a flat surface which got the machine up and running temporarily.
A more permanent fix is to completely remove the rubber, leaving the smooth metal surface of the shutter for the rubber drive disc to rest against (the original ST1200's were actually designed like this, without the rubber). Some people do this with sanding paper, although I think this could be a bit messy. I had my projector serviced recently and the chap used "a chemical" to remove the rubber. I don't know what unfortunately, but I bet someone on this forum with much more technical know-how than me does! Although, whatever it is, I think you'd have to be extra careful not to get it anywhere near any other rubber parts!
The rubber drive discs (don't know proper term for them) do also suffer the same fate as the rubber on the shutter.
With luck, you may be able to get a replacement 24 f.p.s. drive from someone on the forum. Alternatively, the chap who serviced my Elmo lathed off the top surface of decayed rubber, leaving a fresh, smooth surface.
The machine runs very smoothly and very quietly. As the diameter of the shutter has decreased, however, the machine will run a little bit faster. This isn't really noticeable at 24 f.p.s. but you can hear an increase in pitch at 18 f.p.s. But the main thing is that you can get the Elmo back up and running.
Anyone know what chemical he may have used...?
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