8mm Forum: Sankyo Sound 500 problem...Please Help!

This is topic Sankyo Sound 500 problem...Please Help! in forum 8mm Forum at 8mm Forum.

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Posted by Dan Pinto (Member # 630) on March 12, 2007, 09:15 PM:

My take up reel fails at about the 400ft mark on 600 ft reels. I changed the 2 main belts but I still have the same problem. I love this projector and has never failed, what should I do?

Thanks,

Danny

Posted by Mike Peckham (Member # 16) on March 13, 2007, 07:05 AM:

Dan

The problem is most likely in the clutch mechanism at the base of the take up reel arm. If you take the rear cover off the projector you'll see a collection of white plastic gears that between them transmit the motion from the belt to the take up reel. One of them is a compound assembly which includes two cork washers that rub against each other to form a clutch.

I seem to think that it might be possible on this assembly to tighten a small nut to increase the torque on the discs, that might do the trick. Otherwise it might be necessary to disassemble this mechanism and try cleaning it up; remove any grease and roughen up the friction surfaces on the discs - or replace them altogether.

Good luck [Wink]

Mike

Posted by Dan Pinto (Member # 630) on March 15, 2007, 02:55 PM:

worked like a charm... tnx much!

Posted by Douglas Meltzer (Member # 28) on March 15, 2007, 09:05 PM:

Very impressive, Mike!

Posted by Joe Taffis (Member # 4) on March 17, 2007, 06:02 PM:

sounds similar to the rewind clutch assembly on the Elmo ST800. I tried every which way of adjusting it, taking it apart, tightening, etc. but I guess the cork washers were too far gone. Luckily, Jan Bister came to the rescue with a replacement from his Elmo graveyard, and the machine is in great shape again. [Smile]

Posted by Mike Peckham (Member # 16) on March 18, 2007, 03:50 AM:

Doug

One tries... [Roll Eyes]

Mike

Posted by Kevin Faulkner (Member # 6) on March 18, 2007, 05:32 AM:

Just one point I would like to add and that is that the cork surfaces shouldn't be dry. Elmo, Eiki and others suggest a smear of silicon grease on the surfaces to enable smooth slippage.

If the cork is dry and roughened then the cork can cause juddering instead of a smooth take up.

If this scenario cant be reached then the clutch material is warn and should be replaced.

Kev.

Posted by Mike Peckham (Member # 16) on March 18, 2007, 05:57 AM:

Kev

Good point, I hadn't thought of that.

Mike [Cool]

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