8mm Forum: Eumig P8m ..disassemble

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Posted by Thomas Dafnides (Member # 1851) on April 21, 2012, 07:25 PM:

The intermittant claw on one of my Eumig P8m projectors has receded so that it no longer maintains a loop at the pressure gate.
The strange assembly of this projector is that there is a "silver shield" that seems to cover the entire main drive shaft. I would like to remove the shield.
Has anyone ever disassembled one of these?..some of the screws locking this in, seem to be attached to gear assemblies that would appear to be a step above brain surgery, to reattach again...is this a job that a tinkerer can attempt?
Hopefully, Frank will drop in here.

Posted by Pasquale DAlessio (Member # 2052) on April 21, 2012, 07:41 PM:

HI Tom

I took one apart to rebuilt the power switch. Semd me some pics and I might be able to help you. From memory I am lost [Confused]

PatD

Posted by Thomas Dafnides (Member # 1851) on April 21, 2012, 09:06 PM:

Pat ,
I assume that you entered the projector from the underside of the machine to get to the power switch. I am going from the upper side.
The first arrow to the left points to the "shield" which is rounded on the left end.

Posted by frank arnstein (Member # 330) on April 21, 2012, 09:53 PM:

Hi Tom and Igor,

I like these Eumig p8 projectors a lot and often buy them if they are in good original condition.
The AUTOMATIC & NOVO models are the best to get as on the earlier ones the rubber motor mounts get soft and then the motor hangs down causing the fan blades to foul on the fan shroud.

3 screws hold it all in. You also need to remove part of the power socket to allow the shuttershaft to come out as a complete assembly.
There is a plastic timing gear on it that turns at 1/3rd speed of the shuttershaft. This is how a single shutter blade behaves as if it has 3 blades. Its a brilliant design.

It has an eccentric bump on the plastic timing gear which pushes a ball and rod which then activates the claw depth stroke. See if that rod is stuck or see why the claw wont move in when the plastic cam activates it.

Its fascinating to hold this small assembly in your hands and rotate the shuttershaft by using your fingers. Everything is very small but it all moves in perfect unison. I love to watch it as it repeats its complete cycle without ever losing the timing.

good luck and let us know what you find.

dogtor frankarnstein
.

[ February 02, 2013, 07:40 AM: Message edited by: frank arnstein ]

Posted by Pasquale DAlessio (Member # 2052) on April 21, 2012, 10:13 PM:

dogtor

The thing that amazes me about these little machines is that they weigh almost as much as a B&H 2585!

Igor

Posted by frank arnstein (Member # 330) on April 21, 2012, 10:36 PM:

Igor,

Most of that heavy weight is in the transformer.
Once that is removed then the rest of it could almost be blown away by a gust of wind.

dogtor frankarnstein [Wink]

[ February 02, 2013, 07:37 AM: Message edited by: frank arnstein ]

Posted by Paul Adsett (Member # 25) on April 22, 2012, 10:25 AM:

Frank,
I have always thought that Eumig had the best design engineers, some of their designs (like the P8 mechanism above) were just brilliant. All of their projectors were unique and innovative in some way - always ahead of the competition.

Posted by Thomas Dafnides (Member # 1851) on April 22, 2012, 07:45 PM:

Frank,
Thank you for your professional input, as I know you have repaired many Eumig units. The model you show, I believe is the original P8, mine is the P8-M...and as you can see in the photo below, Eumig made some design changes...there are at least 7 screws to remove and the screws to the left actually attach to the gear assemblies which appear to me to be very meticulous to re-align and re-attach. Have you worked on this model?
I apologize for the small photo but forum software would not upload it until I re-sized it, then I had to re-enlarge it, and lost a lot of resolution.

Posted by frank arnstein (Member # 330) on April 22, 2012, 11:16 PM:

Hi Tom, Paul and Igor

I went and found a wrecked P8 Novo to take pics of.
The later model P8's all had electric rewind and thats why yours differs from the early P8 with hand rewind.
Removal of the shutter assembly is just as easy to do on the later ones. Only remove the 4 deepest screws but leave the two outer ones intact as pictured on mine.
There is one more screw to remove at the other end. The one that it pivots on for frame adustment. Then after removing the power socket screws, the whole lot will come away as pictured below.

Good luck Tom and we will see how you go.
dogtor frankarnstein [Wink]

[ February 02, 2013, 07:36 AM: Message edited by: frank arnstein ]

Posted by Joe Balitzki (Member # 438) on April 22, 2012, 11:39 PM:

Isn't it nice to have a Dogtor in the house?
Dogtor, don't forget to feed Igor! [Smile]

Posted by Thomas Dafnides (Member # 1851) on April 23, 2012, 10:12 AM:

Frank,
Thanks for the clarification and indepth instruction with photos . Have a great day! - Tom

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