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Topic: scratches (in middle?)

Gordon McLeod
Film God

Posts: 9532
From: Toronto Ontario Canada
Registered: Jun 99

posted 08-28-2006 10:26 PM

I disagree with a roller issue as on the strongs they would not adjust that low especially if it is an AP
And if this is post make up first show then that is not an issue
That type of straight line horizontal scratch is almost always a missthreaded keeper roller

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Dave Callaghan
Film Handler

Posts: 60
From: Toronto, Ontario, Canada
Registered: Jan 2003

posted 08-28-2006 10:52 PM

From your photograph, it looks like that scratched film is not lying flat - i.e. it has a curvature.

While that might be a clue that will solve the mystery, I have to ask if you have PTR rollers installed.

I don't see them in the photograph, but is it possible that someone threaded the print through the cleaner without the PTR's actually being in place?

I also notice you have a guide roller installed above the Dolby digital head. What happens if that guide roller is missed?

These are beyond mistakes, but these scratches are so major, the impossibly ignorant / uninformed should not be overlooked.

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Kevin Raisler
Film Handler

Posts: 52
From: Warsaw, IN, USA
Registered: Jun 2003

posted 08-29-2006 02:12 PM

quote: Chad Smith
We have never had scratches like these on our dolby houses, only on our DTS houses, which could just be by chance (we have 3 Dolby houses and 5 DTS houses).

sounds like you may have someone who does not no how to thread the dts up... those scratches sure look alot like build up damage to me...

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Bruce Hansen
Jedi Master Film Handler

Posts: 847
From: Stone Mountain, GA, USA
Registered: Dec 1999

posted 08-30-2006 04:45 PM

quote: Chad Smith
form what looks like a very elongated sine wave on the soundtrack side of the scratch

This could be caused by a slightly warped platter deck. As the deck rides up and down it would change the amount of contact with the film, changing the length of the scratches. Looking at the picture of the platter,if the film was threaded on the wrong side of the keeper roller on the take-up platter, the film might be in contact with the edge of the platter.

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Monte L Fullmer
Film God

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

posted 08-30-2006 06:25 PM

Hmm..good ol STRONG A-3 platters (with no wrap detector mounted on top of the tower arm.) ...

Okey, one thing that did caught my eye was the return roller to the top deck - on the high side so the film isn't laying down on the platter heading to the ring.

Are the other rollers set up this high? Also, how are the roller bearings on this ALPHA platter anywho -the return roller on the bottom of the tower, the yo-yo rollers (shafts have not worked loose) the keeper rollers...

Another thing that I'm concerned is that roller mounted on the toe kick of the console, for I do believe that that roller should be in a larger diameter so to reduce rotation and tension as the platter is pulling the film across. I can see so much tension going underneath that roller being so small of a diameter..

Plus, the soundtrack is going towards the wall and I've always never like this method of threading for the curl of the film is being fought against the flow of the film path. AND, with being soundtrack towards the wall, the emulsion is facing that toe kick roller-where there is the most tension - if the decks in the rewind mode are pulling rather tight.

Being an "driver's side" platter operation, try going soundtrack towards the tower when coming from the brain and going back to the tower - soundtrack facing you (or away from the wall) going to and coming out from the projector ... might make a difference..

good luck - Monte

[ 08-30-2006, 09:45 PM: Message edited by: Monte L Fullmer ]

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