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» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Maximum Amount Of Film On A Platter Question

   
Author Topic: Maximum Amount Of Film On A Platter Question
Mitchell Dvoskin
Phenomenal Film Handler

Posts: 1869
From: West Milford, NJ, USA
Registered: Jan 2001


 - posted 03-24-2008 09:46 AM      Profile for Mitchell Dvoskin   Email Mitchell Dvoskin   Send New Private Message       Edit/Delete Post 
What is the most film, time wise, I can safely load on to 1 deck of an old Potts Platter? Acetate? Polyester?

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Brad Miller
Administrator

Posts: 17775
From: Plano, TX (36.2 miles NW of Rockwall)
Registered: May 99


 - posted 03-24-2008 12:42 PM      Profile for Brad Miller   Author's Homepage   Email Brad Miller       Edit/Delete Post 
With or without a safety ring? Big difference.

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Monte L Fullmer
Film God

Posts: 8367
From: Nampa, Idaho, USA
Registered: Nov 2004


 - posted 03-24-2008 01:00 PM      Profile for Monte L Fullmer   Email Monte L Fullmer   Send New Private Message       Edit/Delete Post 
Wasn't the avg time length (long before the concept of these platter rings) for most platter units set at 4.5hrs?

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Mitchell Dvoskin
Phenomenal Film Handler

Posts: 1869
From: West Milford, NJ, USA
Registered: Jan 2001


 - posted 03-24-2008 01:41 PM      Profile for Mitchell Dvoskin   Email Mitchell Dvoskin   Send New Private Message       Edit/Delete Post 
No ring, just those suction cup holders thingies.

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Brad Miller
Administrator

Posts: 17775
From: Plano, TX (36.2 miles NW of Rockwall)
Registered: May 99


 - posted 03-24-2008 02:47 PM      Profile for Brad Miller   Author's Homepage   Email Brad Miller       Edit/Delete Post 
I wouldn't put more than 3 hours (with a print belt and at least 8 suction cups taped down) on one of those. I also wouldn't put anything you truly cared about on it.

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Amanda Mundin
Expert Film Handler

Posts: 122
From: Belper, Derbyshire, UK
Registered: Sep 2005


 - posted 03-24-2008 04:54 PM      Profile for Amanda Mundin   Email Amanda Mundin   Send New Private Message       Edit/Delete Post 
Are these platters not good??

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Ron Funderburg
Jedi Master Film Handler

Posts: 814
From: Chickasha, Oklahoma, USA
Registered: Nov 2007


 - posted 03-24-2008 06:37 PM      Profile for Ron Funderburg   Author's Homepage   Email Ron Funderburg   Send New Private Message       Edit/Delete Post 
Potts platter not good? Well they are good at tearing up film! As you might guess from Brad's statement they are bad about the film coming off the back and wrapping underneath on a tail wrap. After the get older they tend to creep out of the settings rather fast for my liking.

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John Walsh
Film God

Posts: 2490
From: Connecticut, USA, Earth, Milky Way
Registered: Oct 1999


 - posted 03-24-2008 07:37 PM      Profile for John Walsh   Email John Walsh   Send New Private Message       Edit/Delete Post 
A lot of film can be wound onto the platter deck, but problems can happen during payout. After 4 hours or so, the remaining 'ring' of film does not feed into the payout head property. I found that the older Potts (with the breaker point switch) operated too stiffly; the film would wrap around the payout head about 180', then finally pull hard enough to get the payout arm to move. The deck would then spin too far, wrapping around the other way, and repeat.

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Brad Miller
Administrator

Posts: 17775
From: Plano, TX (36.2 miles NW of Rockwall)
Registered: May 99


 - posted 03-24-2008 08:02 PM      Profile for Brad Miller   Author's Homepage   Email Brad Miller       Edit/Delete Post 
...until the last couple of reels were sitting in a tangled mess of spaghetti 10 feet away from the platter.

That is why I asked if you were going to use a safety ring. The film can still slip through those suction cups, particularly if they are not taped down to the platter. With the safety ring, the film isn't going anywhere, although what John described can still happen and scratches around the brain can result.

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Monte L Fullmer
Film God

Posts: 8367
From: Nampa, Idaho, USA
Registered: Nov 2004


 - posted 03-24-2008 09:13 PM      Profile for Monte L Fullmer   Email Monte L Fullmer   Send New Private Message       Edit/Delete Post 
what about converting the old breaker point brains to phase control..or is that possible...for I'm not to familiar with Potts - closest I've seen Potts is the Balco platters ...

Yea, pretty scary with a large movie on a deck (like when I ran "Gods and Generals") I made a phase control brain just for this presentation and used a film wrap to ensure the end doesn't fly out.

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Louis Bornwasser
Film God

Posts: 4441
From: prospect ky usa
Registered: Mar 2005


 - posted 03-24-2008 09:31 PM      Profile for Louis Bornwasser   Author's Homepage   Email Louis Bornwasser   Send New Private Message       Edit/Delete Post 
4.5 hours with "proper care." I use an old trailer to form a ring which is securely taped down, if Brad's device is not available.

Remember mylar is 30% thinner than acetate, so that should help a bit more. This is for the 52" platter; less on the 42". Louis

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