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This topic comprises 2 pages: 1 2
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Author
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Topic: Intermitttent Problem Question
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Monte L Fullmer
Film God
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Posts: 8367
From: Nampa, Idaho, USA
Registered: Nov 2004
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posted 07-25-2007 05:29 AM
Hello and welcome to Film-Tech. My experiences with the film bouncing up and down on the screen that gunk gets built up inbetween the teeth of the sprocket causing this bouncing problem.
I don't believe that a sprocket that uses those pins (called taper pins - for the STANDARD, Super and E-7 Simplex machines) can be used, what it seems that you have are XL's since your description of the center screw mounted sprocket to the shaft.
Of course, are you aligning the sprocket, when replacing it, esp. with the rebuilds that you've done, with the rest of the sprockets on the machine? An out of align sprocket could cause some side pull within the sprockethole which could be causing the bouncing ..
Course, wonder if reversing the sprocket would help some..
..just helping out since we don't know the exact model of your projectors..please update with what you have, or even picts would help also.
thx - Monte
Is this ailment on all three screens, or just the one?
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Joe Woodall
Film Handler
Posts: 6
From: Dewy Rose Georgia
Registered: May 2004
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posted 07-25-2007 10:15 AM
Hi Guys, 1st they are all three regular Simplex machines, some of the family jewels, but over the years parts and the movements were swaped about with whatever was available. The turning of the sprocket is something I thought of when I first saw the undercut Sunday, but that sprocket has already been turned by the previous owner.
I'm having this problem with the 1 projector that I tore into Sunday night , but it is a problem that manifest itself very slightly on 1 other machine. It too had a sprocket change, about a year ago and it has a slight tick, up & down, but nothing like what's going on with this one.
Guess I'm going to have to try to reinstall the original sprocket and order a new one with hopes it will arrive in time & then will work properly. Very confused why this happened though. A Cousin once told me that when installing a sprocket in the intermittent, you have to adjust it and run it in, a several hour process sometimes. I though, I had done so, but this one's sure got me over the barrel.
Thanks for trying to help me. Joe
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