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Author Topic: Intermittent shutter drop out. Chris Byrne Expert Film Handler Posts: 102 From: Kirwan, Australia Registered: Jan 2003 posted 03-06-2004 06:20 PM                     I am running Kinoton FP30D projectors, with 15 * 15 matrix automation set up. The shutter in question is the 'flip-flop' style plate (not the spring loaded variety.) My problem is that the shutter is randomly closing - sometimes at the start of show, sometimes 5 minutes from the feature end. By random I mean it has happened about 5 times in 3 months (2 of those weeks I was on leave, thinking I had fixed the problem.) I have replaced the 24V relay that triggers to open the shutter and also the shutter open switch, which I tested relentlessly and found that it was staying open circuit about 1 in every 30 pushes. I cannot find fault with the shutter close switch while testing. I have also had a look at the commmon and active wiring to the shutter itself, which are all in good shape. As I'm sure most of you can appreciate, intermittent problems are a real ball-breaker. Has anyone had any similar problem in the past or can lead me in the right direction? Any help would be much appreciated. FYI - regularity of drop out has been about once a fortnight.  |  IP: Logged Travis Hubrig Expert Film Handler Posts: 175 From: Minot ND, USA Registered: May 2003 posted 03-07-2004 02:17 AM                     once a fortnight? could you translate to stupid american? Up here I think that would be: in a coon's age. Sorry this didn't help with your problem.  |  IP: Logged Manny Knowles "What are these things and WHY are they BLUE???" Posts: 4247 From: Bloomington, IN, USA Registered: Feb 2002 posted 03-07-2004 09:13 AM                     I haven't spoken the Queen's English in a while but I think a fornight is about 2 weeks..?  |  IP: Logged Dick Vaughan Phenomenal Film Handler Posts: 1032 From: Bradford, West Yorkshire, UK Registered: Jul 2000 posted 03-07-2004 09:38 AM                        Manny 14 days and 14 nights is the right answer Surely you all speak correctly in the Bahamas.After all you are part of Her Majesty's Commonwealth  |  IP: Logged Jackson Gilman Film Handler Posts: 37 From: Madison, WI, USA Registered: Jan 2004 posted 03-07-2004 04:18 PM                     Slightly similar problems have indeed occurred in our booth, although many of them were human error, (wrong program with the wrong print.) Is the electromagnet actually pulling it shut, or is the blade simply falling shut? Some of our projectors had a problem where the changeover would fall back into its closed position. Noting that you have matrix-style automation (if I'm thinking clearly, that would be hard-wired programming?) have you checked to see if any of your diodes have the slightest leak current? If so, that may be the culprit as well. However, I have never worked with that kind of automation. Good luck!  |  IP: Logged Chris Byrne Expert Film Handler Posts: 102 From: Kirwan, Australia Registered: Jan 2003 posted 03-08-2004 12:53 AM                     Jackson, The actual problem has only happened once to me during a show (the other times it has been another of my workmates on shift.) When it happened to me, I had just fit a new open switch due to suspect contacts on the original switch. I am almost certain the cause of shutter closing was due to a locking screw on the rear of the switch which had worked its way loose. This in turn caused an open circuit. Although the problem hasn't occurred for over a fortnight - I think it is still very much there. I have isolated the matrix and shutter seems to work independent of it, so that would rule any matrix induced problems out.  |  IP: Logged Douglas Curry Film Handler Posts: 21 From: Garbutt, Queensland, Australia Registered: Nov 2002 posted 10-13-2004 11:20 PM                        Just to update on this problem in case anyone else stumbles along the same lines.. The problem was a little bit deeper than we thought. Ended up being the PCB the shutter relay resides on. Old 'dry' solder joins behind the board coming too loose over time. Easy fix, pain in the but to find.  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 10-14-2004 12:15 AM                     Thank you for the update. Somewhere, someone, at some point in the future will be searching the forums for a solution to this problem, and you may have just saved them a ton of energy in tracking it down.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 10-14-2004 01:23 AM                     And the real solution will be to throw that god awful see-saw Biideklappe away and put in the modern version. Steve  |  IP: Logged Michael Schaffer "Where is the Boardwalk Hotel?" Posts: 4143 From: Boston, MA Registered: Apr 2002 posted 10-14-2004 02:45 AM                        quote: Steve Guttag Biideklappe What does that mean?  |  IP: Logged Steve Kraus Film God Posts: 4094 From: Chicago, IL, USA Registered: May 2000 posted 10-14-2004 07:18 AM                    Perhaps Bildeklappe?  |  IP: Logged Michael Schaffer "Where is the Boardwalk Hotel?" Posts: 4143 From: Boston, MA Registered: Apr 2002 posted 10-14-2004 01:09 PM                        I don't know that word either.  |  IP: Logged Steve Kraus Film God Posts: 4094 From: Chicago, IL, USA Registered: May 2000 posted 10-14-2004 02:17 PM                    Yeah but it sounds a bit more plausible. Something that klaps down on the picture. Larry?  |  IP: Logged Daryl C. W. O'Shea Film God Posts: 3977 From: Midland Ontario Canada (where Panavision & IMAX lenses come from) Registered: Jun 2002 posted 10-14-2004 08:06 PM                        bildeklappe: picture flap, or in context, changeover shutter. The see-saw version is indeed a piece of junk.  |  IP: Logged Michael Schaffer "Where is the Boardwalk Hotel?" Posts: 4143 From: Boston, MA Registered: Apr 2002 posted 10-15-2004 02:43 AM                        No guys, it's "Bildklappe". When I communicate in foreign languages, I try to respect and observe the other language's spelling and grammar as well as I can. In real life, German is not as hideous as in "The Great Dictator". OTOH, it's not so important, I just wanted to pick on G for using a foreign term (which looks kind of cool and worldly) but misspelling it totally.  |  IP: Logged

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