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Author Topic: HELP: Prints getting marked with "Dots" Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 03-21-2000 11:26 AM                     I assume the platters have removable centre pieces. try swapping the centre pieces with another screen and see if the problem moves Also what type of guidance rollers ( the ones above and below the machine that the film makes it twist on) I have seen the film cup into the flange on some of those rollers so they add an abraded mark that increases over time If my memory is right the Specco is similar to the kelmar cue sensor  |  IP: Logged Dustin Mitchell Phenomenal Film Handler Posts: 1865 From: Mondovi, WI, USA Registered: Mar 2000 posted 04-01-2000 12:10 AM                     Well, its not the brains (center peices, whatever). I swapped them and Drowning Mona ran through the suspect ones for about a week and a half and not the slightest sign of damage.  |  IP: Logged Pat Moore Master Film Handler Posts: 363 Registered: Mar 2000 posted 04-01-2000 07:51 AM                     Sounds like it comes back to fixed rollers outside the projector. Top candidates to me would be failsafe, upper/lower guide rollers, and the fixed rollers sets on the platters themselves that are used regardless of the center feed. I have a strange feeling it's a mis-thread. One of your operators may be getting around a keeper rather than under it, or hace the rollers reversed. For instance, the "first and last" rollers on the Strong Platter are swivel types. They can be reversed 180-degrees so the film runs over the keeper. The keeper should always be on the ouside of the curve as the film goes around the pulley. If one of those rollers is reversed it will mark the film as you describe. Check the keepers for any wear spots -- those things are not designed to turn freely. Pat  |  IP: Logged Dustin Mitchell Phenomenal Film Handler Posts: 1865 From: Mondovi, WI, USA Registered: Mar 2000 posted 04-01-2000 09:58 AM                     I'll check all the rollers again. Interesting idea about the misloading. Problem is its only happening on this one projector. If someone was misloading like that it would show up on more prints. But I'll around about it none the less.  |  IP: Logged Joseph Pandolfi Expert Film Handler Posts: 213 From: Milford, CT. Registered: Nov 1999 posted 04-01-2000 10:55 AM                     We just had a similar problem on American Beauty two weeks ago. There was yellow dots on the far right side of screen against the masking. The head projectionist re-aligned the tension fail-safe roller coming from the platter. What I noticed on the non-soundtrack side of the film when I shined a flashlight at a certin angle that the side of the film was quite worn with surface marks.  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 04-02-2000 01:15 PM                     Do you have the strong tension failsafes mounted on the top of the platter? I have seen them do some wild and wonderfull marks especially is the two rubber rings are flatted. Of all tension failsafes it is the poorest design yet.  |  IP: Logged Tim Reed Better Projection Pays Posts: 5246 From: Northampton, PA Registered: Sep 1999 posted 04-06-2000 10:11 AM                       Dustin, ISOLATE the unit causing the damage. Take a virgin piece of film 10-15 feet long and splice it in a loop. Thread this through the projector only (leave it out of the SRD reader for now). Turn the projector on and let it run a few hundred times through the machine and see if the scratches develop. If not, thread through the SRD reader and repeat the process. Keep adding components (and using a new longer loop when necessary) until you get to the unit that's causing the problem. When you've at least isolated the major component, it will then be easy to narrow the search down. ------------------ Better Projection Pays!  |  IP: Logged

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