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Author
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Topic: Slipping Eumig Drive Discs
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Paul Adsett
Film God
Posts: 5003
From: USA
Registered: Jun 2003
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posted February 27, 2016 03:29 PM
An almost universal problem on the Eumig 800 series, and to some extent on the 900 series, is slippage of the motor drive ball aginst the forward and reverse rubber faced drive discs. Various solutions have been offered, and tested, with mixed results. Certainly wiping with alcohol, or lightly roughening up the discs with emery cloth, can help. I have tried both of these solutions, but like many pain killers, they offer only temporary relief.
Today I tried something new, which looks promising, but of course only time will tell. I was in an auto parts store and saw a spray can of fluid that is used to remove squeeks and slippage of fan belts. The product is called CRC Belt Conditioner. I though that just possibly this might help with the Eumig disc problem. So I purchased a can for $4.99. Of course just spraying it onto the drive discs is not the way to go, in fat that would guarantee the ruination of a great projector. So, I took the can outside the house and just sprayed enough into the cupped lid of the can so I could soak the tip of a q-tip applicator. Then I wiped this across the surface of the rubber discs a couple of times and let it dry for an hour. One thing I noticed immediately is that the surface of the rubber now looks a nice deep shiny black, like new rubber looks.
Anyway, when I powered up the Eumig 820 I was impressed with how it immediately came up to full speed in both forward and reverse, running like a new machine.
My S938 has been a little slow lately in getting up to full speed, so I gave it the same treatment and got the same great result! So right now it looks that this may be a worthwhile addition to the list of possible fixes for this problem.
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The best of all worlds- 8mm, super 8mm, 9.5mm, and HD Digital Projection,
Elmo GS1200 f1.0 2-blade
Eumig S938 Stereo f1.0 Ektar
Panasonic PT-AE4000U digital pj
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Osi Osgood
Film God
Posts: 10204
From: Mountian Home, ID.
Registered: Jul 2005
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posted February 29, 2016 12:25 PM
Is that the sound which sounds like a car starting, when you turn on you're projector? I had that problem in short form some years ago, I can't remember exactly what I did to counteract it.
I have a different problem ...
At times, when I turn on my 926 EUMIG, it will start a little slow, rev up to the 24 fps after just a bit, but it can fluctuate back and forth just a little. It seems to be getting worse at this, even if I use it daily. I thought this would have been a problem with a projector sitting idle for weeks.
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"All these moments will be lost in time, just like ... tears, in the rain. "
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Paul Adsett
Film God
Posts: 5003
From: USA
Registered: Jun 2003
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posted March 01, 2016 09:58 AM
Obviously that is the ultimate solution to this problem Gary, Many years ago I did in fact repair an S 709, which belonged to a friend of mine. I had access to a really good machine shop where I worked, and was able to 'bootleg' the manufacture of some special parts for his Eumig at no cost (to me!). These included two new Delrin AF bushings for the motor mount, and two Butyl B612-70 rubber discs'. These discs were 0.062 ins thick, and I cut them across the diameter with a razor blade in one place from the outside diameter to the inside diameter. I then was able to position these on top of the original discs and bond them in place with a thin layer of Scotchweld epoxy. It worked great!
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The best of all worlds- 8mm, super 8mm, 9.5mm, and HD Digital Projection,
Elmo GS1200 f1.0 2-blade
Eumig S938 Stereo f1.0 Ektar
Panasonic PT-AE4000U digital pj
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