My father-in-law is 94 years old and has mounds of super8 silent film he would love to watch. His projector broke and was going to be too costly to fix so we found a Eumig Mark S807D for a reasonable price and that the seller said 'worked'. It loads the film and runs fine but the speed is too fast. We have read the forums and there are many posts about how to fix a slow speed, but not when it runs too fast. We have the speed set to 18, we tried cleaning rhe rubber on the discs. We tried changing the speed to 24 and the wheel was not hitting the disc so we adjusted that so both settings are working, but film still runs too fast. Does anyone have an idea of a part that may need adjusting or replaced that would cause this? Thanks so much for any ideas.

I have gleaned some information from two separate sources which may help.

How to correctly change the film speed :-
1) Turn main switch to STOP
2) Connect projector to the mains
3) After changing speed control wait for a couple of minutes to allow the flywheel speed to stabilise

I believe there is a stop with a set screw on the shaft which adjusts how far up the speed selector will go.

I think Maurice is onto something about how far up the speed selector will go. I don't know your model, but I have an Eumig 810D that looks so similar to yours that I will assume the 18 /24 fps switch will be the same. If I set mine to 24 it runs too fast. What I do is to pull it slightly down from 24 towards 18 to get a more normal speed. I haven't checked if I can adjust the max setting or not, but I guess I should :-)

I would take the back off and look at the voltage selection from the main transformer. There is a blade connection from the tranformer to the motor that needs to be set correctly for Eumig projectors. 110V for American use is best. If you are still having problems there are two potentiometers on the main board that control the speed of the motor, one that limits 18fps and one that limist 24fps. If you aren't familiar with electronics then you should have someone look at it. Not a hard fix.

I am sorry to dispel Erik's comment about two potentiometers controlling the speed.
The speed of the Eumig 800 series is controlled by moving the rotating ball up or down on one of the two large black discs. (Forward or reverse).

Thanks so much for the responses. We adjusted the screw in the back so that the wheel is as low down on the disc as it will go (knob on front is set to 18fps). We are in the US so we have it set on 110v / 60. The film still runs too fast. Do any of you see anything else we may be overlooking? We really appreciate your help!

Wilson
You say you are in the US. I assume your voltage is around 110-120. I therefore suggest you use the transformer setting for 125 and see if its slows down the motor.

I actually do agree with Maurice on this one. Try a higher input voltage setting. Simply pull the blade connector off the transformer and move it to the 120 or 125v input setting. If that still doesn't work then message back on here.

I tried all of these settings: 100, 110, 117, 125 and 160. Motor continues to run too fast on each setting.

Okay, you mentioned first that you cleaned the rubber drive wheels but then the motor shaft didn't connect to them. How much rubber did you take off them and how did you do it? I usually recommend on this model that if the wheels have hardened to simply use a pencil eraser on them to remove just a micron of dry slick rubber off them. Have done it twice with two different 807 Eumigs and they run perfectly now and for years. If you took too much surface area off then you have a problem. There are new replacement wheels available from another collector/restorer if you need them (bonus they don't cost much). I would contact Phil Johnson who has extensive knowledge of this model and ask him about the problems you are having. He may be able to guide you in tuning this one in. Shouldn't take much since the Eumigs are workhorses. They were built to last and I've been using three of them for years.

The rubber drive wheels look very poor, they should have a fine clear surface. As Erik says, perhaps they should be replaced.

Wouldn't it go too slow and not too fast if the rubber is bad? Bad grip would cause less speed on the wheel it transfers to?

I agree with Eivind's statement. On one of my 807SD's, the rubber surface of the disc is uneven. The result is the projector runs too SLOW.
I understand "Wilson"'s issue is projector is running too FAST. So it is now looking less like a "disc" issue and more like a fault which is causing the motor to run to quickly.
I will look and see if I have a service manual that perhaps would show something....

Greg has made a good point. Wilson has used five different inout tappings on the transformer, all to no avail. It still runs too fast. There must be something else causing the problem. But how to find it?

Wilson,

Here is a pdf file that shows the wiring diagram for the 807SD....I wasn't sure if you had this already. It is from the "User Manual". I do not have a "Service Manual" which would have been more helpful...

Also, you may have noticed we are required to use our full first and last names on the forum. If you can let me know yours, I will change your 'Username" to your first and last name.

Thanks,
Greg

Thanks for the diagram. My name is Diana Wilson, husband is Layne. We are working together on this problem. I will take Erik's suggestion and reach out to Phil Johnson.

Hello Wilson,

I assume this machine can play for 18 fps or 24 fps as well.
So, if speed is to high for both nominal speeds, try to check if main "driving" roller (motor shaft) positionning can be adjusted. If yes , lowering roller/rubber disk contact (means contact on a upper diameter) will decrease speed. By the picture I can see that point is already "outside", there is not a big margin.
European Frequency is 50Hz, US Frequency is 60Hz. So , an A/C motor runs at higher speed in US (Approx 20% more) for a same voltage.
May be there is a possibility to change frequency setting in this projector (It is possible that needs to move some wires from a soldier point to an other).
The motor looks like an asynchronous motor (Also called "Squirel Cage"). It is possible it is powered directly on domestic voltage through 2 seperate coils (or a combination of 2 coils)

Let us know

Yes, we can set it to 18 or 24, it is set at 18 for the super 8 film we are wanting to view. We have positioned the roller as far out as we can, it is on the edge of the rubber disc. There's a 50hz / 60 c/s lever above this that has been set to 60. In the picture that shows the full back of the machine you will see blue and red tipped wires on the left. The blue wire can be placed on the appropriate 50hz or 60hz terminal. It is on 60. The red tipped wire can be moved to different voltage terminals. We have tried voltage from 100 through 160 and still runs too fast. When we tried 200 the motor would not run. Does anyone have a thought on whether setting the projector back to 220v/50hz and use a 220v to 110v convertor? Unfortunately we would have to purchase one, but I think they can be fairly inexpensive. The projector seems to be a solid machine if we can just figure out the speed issue. Thanks again for any thoughts!

I do not think using the voltage converter to go from 110v to 220v will make any difference. I have a projector that needs 220v and so I use a converter to go from 110v to 220v into the projector. In fact, it may be dangerous to the transformer in the projector (if it has one) or other components to try and go up to 220v.

There must be something else that has failed. Were you able to read the wiring schematic? I could not see a motor symbol on it due to the small and unclear printing to try and identify other related components.

You could also try the other Super 8/8mm forum: http://8mmforum.film-tech.com/vbb/ You would need to register there as a member (it's free) but remember to use your FIRST and LAST name, not just "Wilson".

Maybe this reply will be late for the thread.

Your projector's speed issue looks like a capacitor problem. Should be replaced.