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Author Topic: Scratching on a simplex head... where's it coming from? Mike Blakesley Film God Posts: 12767 From: Forsyth, Montana Registered: Jun 99 posted 11-18-2008 12:07 PM                        If a roller is clogged/not spinning, it could scratch. I could see one of the small rollers doing that. But from the pics, this equipment looks nice and clean.  |  IP: Logged Joe Tommassello Jedi Master Film Handler Posts: 547 From: Coatesville, PA, USA Registered: Jan 2008 posted 11-18-2008 01:34 PM                  Sounds like a problem between the floor and the film. Do you have the same equipment in every house? Perhaps someone is misthreading this particular unit. [ 11-18-2008, 02:58 PM: Message edited by: Joe Tommassello ]  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 11-18-2008 04:26 PM                     quote: Joe Redifer I guess I just can't picture it ever getting misthreaded. Trust me, it aint hard to do. One can easily miss that lower roller after the scanner drum - I had one operator that wanged up 6 prints doing that by missing that lower roller and the film drug across the frame of the reader. But doing this, it's the base side that gets the punishment being that the emulsion side is all inside of that unit as it travels through.  |  IP: Logged Tyler Potts Expert Film Handler Posts: 159 From: Anderson, SC, USA Registered: Sep 2008 posted 11-18-2008 06:06 PM                       [ 03-10-2009, 10:57 AM: Message edited by: Tyler Potts ]  |  IP: Logged Joe Redifer You need a beating today Posts: 12859 From: Denver, Colorado Registered: May 99 posted 11-18-2008 06:16 PM                        I agree that it is not likely the brain. The only real way to scratch a print with a Strong brain is to misthread around the outer roller that is right next to the tri-rollers that lead to the platter tree. This causes base-side "hash-type" scratches toward the center of the picture. That outer roller should be removed to prevent this.  |  IP: Logged Richard B. Perrine Film Handler Posts: 89 From: Cuyahoga Falls, Ohio Registered: Apr 2000 posted 11-18-2008 10:46 PM                     I've run into this on the old ORC and Potts platters....usually threading error....aroiund the wrong side of the center roller in the brain...which eventually causes the platter to run slow and wrap the film around the outer brain ring rollers and scratch there too. The wrong side of the center roller give you a center screen scratch. The multiple wraps give you the edges. The other place is misthreading on the platter take-up rollers...llike threading around the first roller on the platter from the machine....instead of properly thru the 2 roller set. Can't find the dust? It's on the print. Rich Perrine  |  IP: Logged John Wilson Film God Posts: 5438 From: Sydney, Australia. Registered: Dec 1999 posted 11-19-2008 02:57 AM                     quote: Joe Redifer I agree that it is not likely the brain. Agreed...a scratch from a brain will move about a bit...but quote: Tyler Potts Pretty strong, doesn't waver. Also, quote: Tyler Potts A few prints this is coupled with one on the right, or once even straight down the middle. It's more likely a constant misthread or an issue in the gate lamphouse side (of course). When you say quote: Tyler Potts the problem is I'm getting to this projector a show or two after the incident. is it you threading these shows or are you following someone else? If it's someone else, is it always the same guy/gal?  |  IP: Logged Tyler Potts Expert Film Handler Posts: 159 From: Anderson, SC, USA Registered: Sep 2008 posted 11-19-2008 09:45 AM                       [ 03-10-2009, 10:57 AM: Message edited by: Tyler Potts ]  |  IP: Logged Joe Tommassello Jedi Master Film Handler Posts: 547 From: Coatesville, PA, USA Registered: Jan 2008 posted 11-19-2008 09:46 AM                  Since it's only happening in one house swap the brains from that platter with another house. You'll find out quickly if that's the problem. Sounds like you are pretty organized there. I would check the log for when the scratches were first reported and compare that with who was running the shows at or just prior to the report and look for similarities.  |  IP: Logged Tony Bandiera Jr Film God Posts: 3067 From: Moreland Idaho Registered: Apr 2004 posted 11-19-2008 02:12 PM                     Tyler, since it's also only happening when you're not on shift, why not simply pop in UNANNOUNCED and check out the booth when the other operators are on duty. That way you'll see conclusively what's happening. My money's on someone misthreading. DO NOT let anyone know you're coming..you need to catch the day-to-day habits, not the ones where everyone's on best behaviour.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 11-19-2008 04:13 PM                     quote: Tony Bandiera Jr simply pop in UNANNOUNCED and check out the booth when the other operators are on duty. Thats probably the best idea presented here. I did just this many years ago when a manager/operator was having bad scratching problems on a Pro?35. The scratches were obviously because she was making her loops too large and it was easy for me to disgnose... but she blatently denied that she was threading wrong. On the third unannounced visit I caught her red handed... and the loops were not only large they were huge and the sound was also way out of sync... I guess the audience didn't care though. That was her last night of employment at that location. Mark  |  IP: Logged Tyler Potts Expert Film Handler Posts: 159 From: Anderson, SC, USA Registered: Sep 2008 posted 11-26-2008 01:49 AM                       [ 03-10-2009, 10:57 AM: Message edited by: Tyler Potts ]  |  IP: Logged Joe Redifer You need a beating today Posts: 12859 From: Denver, Colorado Registered: May 99 posted 11-26-2008 02:04 AM                        Put white tape around the post to make it clearly visible until you order new keeper rollers... which you are doing, right?  |  IP: Logged Tyler Potts Expert Film Handler Posts: 159 From: Anderson, SC, USA Registered: Sep 2008 posted 11-26-2008 10:41 AM                       Oh, we've got keeper rollers on now, haha! Don't know if I clarified that. This has really opened my eyes to the stupid things people can do in booth.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 11-26-2008 11:06 AM                     So...on the offending keeper shaft...there was NO build up or perhaps below that of scraped off emulsion? Steve  |  IP: Logged

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