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Author Topic: Century C left-side focus flutter John Hawkinson Film God Posts: 2273 From: Cambridge, MA, USA Registered: Feb 2002 posted 09-12-2007 05:00 PM                     Wow...this is embarassing, evidently I wasn't taught how to clean a Century C sufficiently...even though we clean the gate rails (technically Film Gate Pads, PA-{1,8,9}-E) religiously, somehow I always assumed that there was some magic that meant that the surface they mate with didn't need the same attention. Removing the trap shows pretty clearly that you can get quite an accumulation on the film trap shoes (SH-15-E) -- right under/around the studio guides. How often is it recommended to remove the trap and clean those shoes (for a non-FilmGuard theatre)? --jhawk  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 09-12-2007 05:32 PM                     Again, if you remove the guides you won't have this problem. There are so many positive reasons I can think of to pull them. I took off three sets today.... lots and lots of gunk under them. They serve absolutely no purpose on a C model head except to accumulate gunk. The image steadiness can actually improve with out them and cleaning the rails is a cinch. Different with an SA as they are used to measure and set the gap when the gate is closed... I still yank em off SA's as well but keep them in the booth for doing the adjustment. Mark  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 09-12-2007 06:09 PM                        They help you insert the aperture plate, but (agreed) are otherwise useless. I "back 'em away" like Steve. Louis  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 09-13-2007 09:14 AM                     Inserting plates has never been a problem in either a C model or an SA... The main thing here is to remove them so cleaning is much simpler and all the crud is removed. Mark  |  IP: Logged Jack Ondracek Film God Posts: 2348 From: Port Orchard, WA, USA Registered: Oct 2002 posted 09-13-2007 09:34 AM                        Is there a chance the film stock might be an off-brand? If John's machines worked fine up to this point, maybe he got a print that wasn't slit right. ?? While I'm all for pulling the rails (done that... it works!), why is it that he's now having troubles with a system that had not been changed or worked on? The only real variables here are the film and any possible gunk between the rails.  |  IP: Logged John Wilson Film God Posts: 5438 From: Sydney, Australia. Registered: Dec 1999 posted 09-13-2007 10:14 AM                     ...or someone who may be having an 'adjustment' moment.  |  IP: Logged John Hawkinson Film God Posts: 2273 From: Cambridge, MA, USA Registered: Feb 2002 posted 09-13-2007 10:49 AM                     No, it was Kodak 2383 from 2007. Having actually taken the trap out (to finalize my adjustment of the studio guides), though, I could believe that some of the gunk on the trap shoes was sufficient to cause this problem, and that moving the studio guides was sufficient to dislodge it or cause its effect to be mitigated. It's not a very compelling theory, but it's not totally implausible. --jhawk  |  IP: Logged

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