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Author Topic: Metal shavings Mike Jones Expert Film Handler Posts: 108 From: Birmingham, MI, USA Registered: Jul 2000 posted 07-19-2001 02:28 PM                     I've got a Century SA-TA projector and was just wondering what could cause it to have metal shavings? Thoughts?  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 07-19-2001 03:07 PM                        Need more specific information. Where exactly are the shavings being seen? Describe the shavings -- color, size, are they attracted to a magnet? Any other symptoms -- scraping sound, binding of gear train, problems with projected image? How long has the problem been occuring? ------------------ John P. Pytlak, Senior Technical Specialist Worldwide Technical Services, Entertainment Imaging Eastman Kodak Company Research Labs, Building 69, Room 7419 Rochester, New York, 14650-1922 USA Tel: 716-477-5325 Cell: 716-781-4036 Fax: 716-722-7243 E-Mail: john.pytlak@kodak.com Web site: http://www.kodak.com/go/motion  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 07-19-2001 09:58 PM                     A fast bet is a misaligned intermitent shoe  |  IP: Logged Mike Jones Expert Film Handler Posts: 108 From: Birmingham, MI, USA Registered: Jul 2000 posted 07-20-2001 04:11 AM                     The shavings are happening right at the film gate and are very small, almost dark blue. Not sure if they are magnetized, as I am now at home.  |  IP: Logged Michael Hunt Film Handler Posts: 63 From: Gloucester, Gloucestershire, UK Registered: Feb 2001 posted 07-20-2001 09:54 AM                        Hmm, It could be that what you have here is the remains of gunk that has built up in the gate, and been 'baked on' and then chipped off as splices go through... I've had similar dark blue deposits in the gate area of my Westrex when running films that have been heavily chinagraphed. I've usually found that such a build up of gunk in the gate will cause focus problems as reel ends approach. I'd be checking the gate for build up if I were you ------------------ Uncle to JEDI Hunt, honest!  |  IP: Logged Mike Jones Expert Film Handler Posts: 108 From: Birmingham, MI, USA Registered: Jul 2000 posted 07-20-2001 01:33 PM                     No, I have been checking the gate the build-up like you mentioned and I know that isn't it. It happens consistently throughout the show. It must be something too tight in the gate, but what that is I can not figure out.  |  IP: Logged Dave Macaulay Film God Posts: 2321 From: Toronto, Canada Registered: Apr 2001 posted 07-23-2001 09:07 AM                     There isn't much anything in the gate that can give off filings. No moving parts except the film, and it isn't going to grind off metal. If something very nasty is happening in the shutter area some crap might get through the aperture, but not likely. Check around the moving parts. The sprocket traps are probably maladjusted or bent. The intermittent trap is the most likely culprit. I may even be a loose intermittent sprocket - is that one pinned or clamped? - or a failing intermittent shaft bearing. Make sure it really is metal, the parts that can usually be ground up are all steel so a magnet will help. Something real bad has to happen for the alloy case to be worn at! Stuff powdered off the film can look very metallic, especially any photogard-like coating that is inadvertently put on/in the sprocket holes.  |  IP: Logged

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