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Author
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Topic: Changeover keeps changn' over:confused:
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John Eickhof
Jedi Master Film Handler
![](http://www.film-tech.com/ubbmembers/323.jpg)
Posts: 588
From: Wendell, ID USA
Registered: Jan 2000
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posted 02-21-2001 11:36 PM
Two things...do you leave any overhead work lighting on (mainly small spot flood or simular) Even though Xetron claims these are not light sensitive, I have seen them cue from light bouncing off the film at the right angle. Also, when this occurs, is something else in the building starting up? Blower, AC or some large current draw? You may be experiencing a voltage spike into the power supply for the failsafe causing it to cue off...last, check the wiring and small plug that attaches to the failsafe, clen it with alcohol or contact cleaner then re-plug it in. Good luck------------------ John Eickhof President, Chief Slave Northwest Theatre Equipment Co., Inc. P.O.Box 258 Wendell, ID. 83355-0258 208-536-5489 email: jeickhof@nteequip.com
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John Walsh
Film God
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Posts: 2490
From: Connecticut, USA, Earth, Milky Way
Registered: Oct 1999
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posted 02-22-2001 08:29 AM
I think John E. is correct; We also had Xetron infared cue detectors. (A small rectangular reflective sticker(s) is placed on the emulsion side.)It also had an infared film failsafe (to detect if the film broke.) There's a small, 1" square pc board positioned right above the roller where the film goes through the cue detctor/failsafe. After about 2-3 years of use, ours began to 'trip' at random times. We complained to Xetron, and after not being able to do much, they replaced the infared film failsafe with a regular microswitch assembly. Unlike the cue detector, there was no adjustment to set the 'trip' level. Try taping a peice of scrap film in the failsafe, start the automation, then remove the film and see it it acts the same as it does during a show. The reason I suggest this is what doesn't quite fit is what happens after. If light is tripping the failsafe, it should act the same as if the film broke, which should put the sound back to music and bring up the house lights (yet you say the sound and light formats are normal?)
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Paul G. Thompson
The Weenie Man
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Posts: 4718
From: Mount Vernon WA USA
Registered: Nov 2000
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posted 02-22-2001 09:53 PM
I have to agree with Gordon on this one, except for the manual C/O switch. But, anything is possible. To isolate the faulty component, are you configured so that you can easily swap the fail-safe/cue detector unit with one that works properly on another machine? If so, does the trouble follow it? That is the first thing I would try. When you are fooling with electronic circuits, you can very easily chase your tail, especially when it comes to intermitting problems. I learned many years ago to never make a flat statement in electronics. ![](http://www.film-tech.com/ubb/smile.gif)
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