8mm Forum: Eumig 607 D problem

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Posted by Kevin Bache (Member # 5783) on February 01, 2017, 03:56 PM:

Hello,

I wonder if anyone can help me. I recently got a second-hand Eumig 607D projector. The front reel rotates faster than the take up reel - which causes the film to spill off the front reel.

Should the front reel spindle mechanism be rotating at all or just passively respond to the pull of the rear reel?

Any advice would be gratefully received!

Thanks, Kevin

Posted by Steve Klare (Member # 12) on February 01, 2017, 06:01 PM:

Hi Kevin,

Welcome!

Whichever reel the film is being pulled from should just freewheel. There should be some mechanism inside to direct power based on the direction the film is supposed to be headed.

What's sad is my own Eumig hasn't ever died on me, so I have no clue how this is accomplished on these machines. On the ones I do know there is a lever with a gear that flips back and forth depending on the direction the main shaft is turning and engages the gears for the correct reel.

Posted by Kevin Bache (Member # 5783) on February 02, 2017, 08:50 AM:

Thanks Steve - and thanks for the welcome.

Has anyone out there got any ideas (and solutions) why my front reel would be turning when it shouldn't be?

Cheers

Kevin

Posted by Andrew Woodcock (Member # 3260) on February 02, 2017, 09:34 AM:

If it has an asynchronous motor,which I suspect it has, I will probably be able to tell you what the issue may be.

Posted by Kevin Bache (Member # 5783) on February 02, 2017, 09:55 AM:

Hi Andrew

The Van Eck website says it has a magnetic motor (aren't they all magnetic?)- not sure that's very helpful. How would I tell whether it has an asynchronous motor?

I took the back off and there appear to be 2 separate cogs on the same spindle which attached to the base of the front arm. The cogs have a thumb wheel and spring providing some sort of adjustment. If I turn the thumb wheel the cog stops moving which is good until the projector is put into reverse - the front reel should then move and it doesn't unless I tighten the thumb wheel. Then I'm back where I started.

Cheers

Kevin

Posted by Andrew Woodcock (Member # 3260) on February 02, 2017, 10:01 AM:

Hi Kevin.

By magnetic they mean it has permanent "field" magnets inside the motor making it a D.C. motor.

I will do a bit of searching around to see if this information is correct.
I suspect it isn't to be honest.

The symptoms you describe are synonymous with projectors having a asynchronous drive chain not one driven by a dc motor.

The explanation for this would take around a page and a half to fully explain but if it is an asynchronous I could inform you when I have more time on my hands of what it most likely will be.

It's all to do with the differences by design forced onto the engineers to produce forwards and backwards movements using different types of motors though.

Posted by Kevin Bache (Member # 5783) on February 02, 2017, 10:06 AM:

Hi Andrew

It has a drive chain running between the cogs that drive the reels. I'm sure my descriptions aren't helping!

Thanks

Kevin

Posted by Andrew Woodcock (Member # 3260) on February 02, 2017, 10:08 AM:

Indeed Kevin! 😂😂

First off Kevin, we need to establish whether this projector contains an AC or D.C. motor as its source of drive.

If it's a D.C. or "magnetic" motor as some people wrongly like to call these things, then it cannot be due to the theory I have and that I myself have experienced similar happenings many times over in the early years of collecting.

As you quite correctly point out, ALL motors use the forces of magnetism to create movement, just some differently to others.

Posted by Brian Fretwell (Member # 4302) on February 02, 2017, 10:37 AM:

I can't think of any Eumig projectors that don't use an AC motor as often they used the motor stator core & windings as the lamp transformer. The similar designed predecessor to the Mk 607D, the Mk 501D does, I have just checked.

Posted by Andrew Woodcock (Member # 3260) on February 02, 2017, 10:55 AM:

I am sure you're bang on the money there Brian as I cannot remember ever seeing a Eumig from this era with anything other than an a.c. motor either.

In fact its the sole reason why they arn t accelerated further up the pecking order of these things!

All those later recording facilities and nothing but home produced movies to ever use them on! [Big Grin]

The Wizards From Vienna?
Well almost, but not quite wizard status from their design team.

One for Edwin to amend perhaps?

Posted by Bill Phelps (Member # 1431) on February 02, 2017, 09:38 PM:

Perhaps it is because the projector has the multi-motion feature, that is 3/6/9/12/18 fps...I have a Eumig 624 with the same features and the feed spool/front reel spins during operation but not enough to cause the film to spill all over...with no film on the projector if you move the dial to select the different speeds while the projector is running it looks like nothing changes and the front spool is spinning but when running a film the speed at which it is being projected does change and possibly this is why the front spool is turning. All of my other projectors have a front spool that is free spinning.

Posted by Kevin Bache (Member # 5783) on February 04, 2017, 03:46 AM:

Hi Bill

Hmmm, the plot thickens. Have you ever had to tinker with the speed the front reel spins?

Anyone else out there have any ideas? All help welcome!

Cheers

Kevin

Posted by Janice Glesser (Member # 2758) on February 04, 2017, 12:31 PM:

I have a Eumig 610D and the front spindle does not move when running in forward. For friction adjustment you can turn the knurled nut to see if the turning stops. You can also check inside the supply reel arm to see if the belt is tight enough and that there are no broken gears.

I have the repair manual... if you want to PM me with your email address I can send it to you.

[ February 04, 2017, 04:08 PM: Message edited by: Janice Glesser ]

Posted by Kevin Bache (Member # 5783) on February 05, 2017, 02:22 PM:

Hi Janice

Good news,bad news! I had (another look inside the front arm and the freewheel metal do-hickey was back to front. After a good 40 minutes trying to get the assembly back together I succeeded and everything worked fine. But...... part of a broken clip/spring thing fell out of the projector and now the high speed rewind doesn't work as the arm that holds the cogs that power the rewind doesn't move up into position. Sigh.

So now I need the metal clip/spring (it looks like it formed a V shape). Does anyone have an idea where a hapless owner might find one (not that I know where it goes!).

Thanks for the help.

Kevin

Posted by Janice Glesser (Member # 2758) on February 05, 2017, 02:54 PM:

Kevin if you PM me your email address I'll send you the Repair Manual that has all the parts labeled and how they are assembled. Perhaps it will help you identify the part more specifically so to replace it.

Posted by Bill Phelps (Member # 1431) on February 05, 2017, 05:35 PM:

So am I to take from this that the front arm is not suppose to spin? If so then while my projector plays the films ok there is a problem with mine as well.

Posted by Janice Glesser (Member # 2758) on February 05, 2017, 06:17 PM:

Yes Bill...it should NOT move on its own.

Posted by Bill Phelps (Member # 1431) on February 05, 2017, 08:03 PM:

It's newly acquired (just a week) and I was under the impression that it gently spun because it is a sprocketless projector. I've ran a few films with no trouble really. I will have to look into it further.

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