8mm Forum: Eumig 810D slowing up

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Posted by Tom Photiou (Member # 130) on November 10, 2015, 04:19 PM:

a common problem with these, i have done the usual trick of ensuring the rubber discs are all cleaned up and also the spinning do dah, any other ideas? Ive been trying to get a guide on these models for lubricating, preferably a service manual, i think this one has been stood still for some time. [Confused]

Posted by Steve Klare (Member # 12) on November 10, 2015, 04:27 PM:

Why is "slowing up" the same as "slowing down"?

I've hatched this idea of extracting the motor out of the machine and applying shrink tube over the metal roller-deally.

That way the contact will no longer be metal on rubber but instead rubber on rubber (more friction...)

Bear in mind: this is all just theory since my Eumig has never exhibited the problem, so I haven't done anything more than think about it. (I try not to fix problems I don't have!)

-yet from little acorns mighty oaks grow!

Posted by Lee Mannering (Member # 728) on November 11, 2015, 04:19 AM:

Stripped a 810 down this year as I figured the 1970's Eumig lubrication would by now have accumulated much dirt which was not visible within the works and re lubricated. Its worth checking for any wobble at the bottom of the motor (the mounts) as if these are worn or cracked (most common on the MK-S machines due to age/material) the angle of the rotating top drive causing loss of traction.The humble Eumig sound projector does like to be used and I would say to anyone in a colder country, store them out of the damp and cold. When working on my own collection of machines I usually find it easier to lay them front down on a large cushion to easily see into the back and gain full access.
All the best Tom

Posted by Andrew Woodcock (Member # 3260) on November 11, 2015, 10:25 AM:

As with any machine, if you go around looking at the exposed mechanism of a running machine, it's usually very apparent whatever faults there are within a mechanical drive chain, from watching it and listening to it.

Just don't poke around in there while it's both live and therefore running. Do your adjustments each time once the mains lead has been disconnected and keep your fingers away from large capacitors even afterwards!

Posted by Rob Young. (Member # 131) on November 11, 2015, 10:42 AM:

Steve, I had that very same idea with the shrink wrap!

Great minds, etc...

I have an 810D which I don't use a lot but always acts up when I bring it back out.

Last time I stuck a sheet of A4 paper behind the infamous rubber disc to protect the rest of the machine as I sanded away with light sanding paper.

Also had my better half stand with a vacuum cleaner nozzle over it to collect bits of sand paper and rubber!

Such fun we film folk have! [Roll Eyes]

It did actually work, with resulting good, stable running speed.

Must get it out and try it again soon. Somehow, I don't think it will run to speed though... [Big Grin]

Posted by Tom Photiou (Member # 130) on November 11, 2015, 11:37 AM:

Thanks all, i shall take another look. [Wink]

Posted by Gary Crawford (Member # 67) on November 12, 2015, 07:09 AM:

Ikept an old Mark S Eumig Standard 8 sound machine running for years after it started to wear a dent in the rubber drive disc with a little sanding, but also with something I got from the auto parts store, Belt Dressing. But eventually it just wouldn't go and I retired it for newer ones. I imagine folks like Steve Klare could do "surgery" on them and other tricks to keep them going. I even filed the opening where the speed change lever is to make it allow the lever to go up a little higher and avoid the well worn dent in the drive disc...and I think I even changed the cycles setting to make up for lifting the lever higher than would have been 24fps. Loved that machine...solid metal ...bright halogen lamp...great lens....but had that early Eumig hum on sound playback.

Posted by Lee Mannering (Member # 728) on November 12, 2015, 07:18 AM:

If you turn the 50/60hz black lever in the back you will have even more speed control.

Also to reduce any audio hum turn the projector to run with sound (no film loaded) and volume up then gently move the small coils for standard and super 8 hidden inside the lamp house. By moving and twisting these you can in effect reduce any hum to near zero.

Happy Eumiging!

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