8mm Forum: Eumig S810 pin broken

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Posted by Steven Abrams (Member # 3045) on April 17, 2012, 10:51 AM:

I have a Eumig S810 which I loaned out. It came back not working.

I have found that the pin in the gate that locates with the film sprocket has been snapped off, probably because they failed to retract it before changing bateween Super and Standard.

Is it possible to replace this pin or is that the end of the projector? Any suggestions would be welcome.

Posted by Hugh Thompson Scott (Member # 2922) on April 17, 2012, 02:31 PM:

Hello Steven,it is possible to replace the claw pin in the Eumigs
because I have done it.You could try the German company
Wittners or even Classic Home Cinema for replacement pins.

Posted by Vincent Zabbia (Member # 2453) on April 17, 2012, 06:19 PM:

Is the pin in the eumig 824 the same as the eumig S810 ? If it is, then I have an 824 that I have which I can pull parts from...

Posted by frank arnstein (Member # 330) on April 18, 2012, 07:55 AM:

Hi Steve

If you have an S810 then its not a dual 8mm but only for super 8. These S810 projectors would usually have a claw with 2 pins.
On a dual 8mm like the S810D the claw will only have 1 pin.
The best way out is to get a complete intact claw from a wrecked machine.
You may be able to locate one from a forum member who has a wrecked eumig like yours. Then fit it yourself or get a technician to fit it for you.

So make sure you get the right claw to put in it.
You need 2 pins if it really is an S810 but if its S810d you need only 1 pin.

dogtor frankarnstein

[Smile]

[ April 19, 2012, 12:16 AM: Message edited by: frank arnstein ]

Posted by Steven Abrams (Member # 3045) on April 20, 2012, 04:58 PM:

It is an S810D, dual format and yes there is only one pin on the claw.

I have tried both Wittners and Classic Home Cinema for a replacement, but they don't have any.

I was considering removing the claw and attempting to make a repair somehow. I have access to a working S810D which I could look at to try and copy the shape and length of the pin.

Even so, I am concerned about dismantling the projector to remove the claw. I have made a half hearted attempt to dismantle it, but there is a spring up inside that is holding it in place and I fear that if I pull it off I would never be able to get it back again unless I dismantle the whole projector.

Somebody must have done the job before and I would appreciate any advice.

Posted by frank arnstein (Member # 330) on April 20, 2012, 05:25 PM:

Steven,

The broken claw pin is too small and too tightly pressed in to repair or replace. Don't try to fix it as the pin and brass shoe have been fitted like a rivet and has been peened in with a hammer or press. Its pressed in real tight and it has to be tight so it never comes loose in the arm.
Replacing the whole arm and broken off claw pin with a good 2nd hand complete claw assembly is the best way out of this mess. Even a 700d claw and arm will do the job as they are the same.

To replace the whole claw/arm, just loosen the 2 shutter-hub locking grub screws then slide the shutter rear-wards on the shuttershaft. This will then give you the room needed to get the old claw out. You can remove the claw pressure spring with pointy nose pliers and refit it the same way after the new claw is sitting in place.
Lastly, you need to re-adjust the shutter/claw so it has the correct amount of penetration into the film sprocket holes and also centralised in the sprocket holes. Grease the claw peg where it runs in the cam groove.

good luck if you want to give it a try. Its not as hard as it looks.

dogtor frankarnstein
[Smile]

[ April 21, 2012, 08:05 AM: Message edited by: frank arnstein ]

Posted by Steven Abrams (Member # 3045) on April 21, 2012, 04:40 AM:

Thank you for that info.

I will give it a try but it will probably be a few weeks before I can even start looking for a replacement part, let alone fit it.

I will post (eventually) my experiences when I have done the job.

Posted by Hugh Thompson Scott (Member # 2922) on April 21, 2012, 07:31 AM:

Hi Steve,if you could get hold of a scrap machine,the Eumig
pins are usually a steel pin mounted in a brass shoe which is
then fixed into the claw arm.The tricky bit is removing the old
one without damage.This is the easiest option without dismantling
your machine which is a specialist job and no offense intended,
is way out of the laymans expertise,that is for an experienced
repair man.With some patience the old fitting can be removed
and the new claw installed,with the aid of some needlle nosed
pliers,as long as the aperture the old claw fittng has been
removed from is clean,the replacement should fit back exactly.

Posted by Colin Robert Hunt (Member # 433) on April 21, 2012, 02:04 PM:

Yes hugh is right. This happened to me many years back on a Eumig. But we hade in the uk the great Johnsons of Hendon who fixed it for me at no charge. Really missed that company that keep the Eumig & Bolex projectors running in the 70's.

Posted by Hugh Thompson Scott (Member # 2922) on April 21, 2012, 02:13 PM:

Y

Posted by Christian Schatz (Member # 2961) on April 22, 2012, 04:20 AM:

Hello,

can someone give assistance on how to re-adjust the claw correctly?

I got an Eumig 810D and it seems that the claw didn't penetrate
the sprocket holes correctly. Sometimes it runs smooth, but on
every splice, or sometimes for no reason, it began to rattle.
Than the film jitters heavy.

I slided the shutter assembly with the claw rearwards and tried
to run the film without it, to rule out the possibility that the
fault is something other. The film runs smooth without the claw.
So my suggestion is, that the claw is/was mis-adjusted.

The pin on the claw seems not to be broken or bent. I compared
it with the other Eumig/Revue projectors i have.

I would be happy if someone can tell me an procedure to readjust
the claw correctly. Or is it simply trial and error? [Big Grin]

Posted by Hugh Thompson Scott (Member # 2922) on April 22, 2012, 01:50 PM:

Hello Chris,if your claw is in need of adjustment,take my advice
and let a qualified service engineer sort it out.These people
use specialist tools and special pieces of kit for testing tension
on springs etc,so if you have problems in that dept. I would
advise get it in for a service.On the other hand,have you tried
some film lubrication on your prints?Keep us informed.

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