8mm Forum: sankyo sound-700 claw

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Topic: sankyo sound-700 claw

Stan Stewart
Junior
Posts: 9
From: Wesson, MS, U.S.A.
Registered: Jul 2014

posted September 29, 2014 05:40 PM

The claw was not advancing the film. I guess I took a chance and used needle-nose pliers and slightly bent the claw in toward the film and it works perfectly. I do not know why it needed the correction but I believe I got a wonderful deal from www.shopgoodwill.com. Thank all of you for the help!

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Andrew Woodcock
Film God

Posts: 7477
From: Manchester Uk
Registered: Aug 2012

posted September 30, 2014 02:58 AM

If you are having to bend the claw in towards the film frame, the chances are you have a lost or damaged spring that should be mounted to the claw and frame to keep the pressure of the claw forward at all times on the cam.

There are usually two springs mounted to the claw mechanism, one for vertical control movement of the claw and the other for axial control movement of the claw on it's cam.

Bending the claw will only mask the issue and though it may well work in the short term there is good chance that jitter will occur without full axial control from a spring or leaf spring dependant on model.

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"C'mon Baggy..Get with the beat"

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Winbert Hutahaean
Film God

Posts: 5468
From: Nouméa, New Caledonia
Registered: Jun 2003

posted September 30, 2014 07:57 PM

I have exactly the same proble with my sankyo 500:

Sankyo 500 cannot show proper picture

It ended up the projector was donated to a member here. I am not sure if he can fix this up or not.

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Winbert

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frank arnstein
Jedi Master Film Handler

Posts: 534
From: Gold Coast. Australia
Registered: Jan 2005

posted October 01, 2014 07:03 AM

Part of the mechanism of the claw is the control springs which keep the claw located on its pivot and against its peg track. But there are also 2 very important tiny ball bearings, that allow the claw to roll sideways without friction.

When both balls are correctly in place in the claw holes, they locate the claw peg in its track and also provides sufficient claw protrusion into the film sprocket holes.

If a single ball is dislodged from its spot in the claw, that upsets all the vital claw settings, particularly the claw penetration into the film.

So check for missing ball bearings on Sankyo claws, even before looking for missing claw control springs. These little steel balls can easily be dislodged by the unawary, and because they are so small, they can drop down and get lost forever in the works of the projector.

So if you have claw problems on Sankyos, check if both your tiny ball bearings are still in place in the claw.

dogtor frankarnstein [Wink]

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At Projector Heaven the Focus is always on Detail.

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[o:/o]<|=- dogtor@projectorheaven.com.au
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Andrew Woodcock
Film God

Posts: 7477
From: Manchester Uk
Registered: Aug 2012

posted October 01, 2014 07:05 AM

Great advice Frank specifically for Sankyo owners, superb sir!

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"C'mon Baggy..Get with the beat"

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