8mm Forum: Notching the Sprocket

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Topic: Notching the Sprocket

Robert Crewdson
Phenomenal Film Handler

Posts: 1031
From: UK
Registered: Jun 2013

posted January 14, 2018 01:27 PM

I just read on Wikipedia that Notching the Sprocket is controversial; what is the general feeling here.

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Maurice Leakey
Film God

Posts: 5895
From: Bristol. United Kingdom
Registered: Oct 2007

posted January 15, 2018 05:35 AM

Robert
I wish I knew what it's all about. Do you? I read the Wikipedia article, but I am none the wiser.

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Maurice

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Robert Crewdson
Phenomenal Film Handler

Posts: 1031
From: UK
Registered: Jun 2013

posted January 15, 2018 05:57 AM

Maurice, I think it's about cutting a V shape when the sprocket is damaged.

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Maurice Leakey
Film God

Posts: 5895
From: Bristol. United Kingdom
Registered: Oct 2007

posted January 15, 2018 06:18 AM

A sprocket is a wheel with teeth.

A vee cut on a perforation is to be despised. With film going round various sprockets, rollers and pulleys such an action can open up the cut even more and cause further damage to the film.

Many years ago, in the 60s I had an early Bell & Howell 601 which refused to accept vee cuts in the library films hired for our film society. This was long before tape, so each film had to be checked on a rewind, vee cut found, then a cement join made.

A year or so later when it was being overhauled during our Summer recess, I mentioned it to the service engineer and he fitted replacement spring retainers to the three sprockets which were much larger and had a more wrap around of the film. We never had any trouble again.

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Maurice

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Adrian Winchester
Film God

Posts: 2941
From: Croydon, London, UK
Registered: Aug 2004

posted January 15, 2018 12:57 PM

Personally, I find them extremely annoying - so much so that I've painstakingly 'remade' the edge using small pieces of film and a CIR splicer - where I've found them on prints I'm keeping. I'd describe them as a virtually pointless step, taken in circumstances where the person responsible is unwilling to make a proper repair using splicing tape or sprocket repair tape.

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Adrian Winchester

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