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Author
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Topic: Smart Showmation Automation Shutting Down
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Oscar Neundorfer
Master Film Handler
![](http://www.film-tech.com/ubbmembers/458.jpg)
Posts: 275
From: Senoia, GA
Registered: May 2000
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posted 10-26-2006 11:42 AM
Ken,
I agree with Gordon's suggestion to put a jumper across the failsafe contacts as a temporary test to see if it still fails.
Also, when wired normally (no jumper) you should see about 4.3 to 4.7 VDC across the failsafe contacts if the machine is unthreaded. When threaded up and running, you should see 0 VDC across the contacts (or VERY close to zero). Try moving wires, connectors, etc. to see if the voltage goes up momentarily. I does not take much time at all for the automation to interpret the open connection as a film break. You may actually need a scope instead of a meter to see the thing misbehave.
Also, I have seen problems with wire connections on the Phoenix connectors where the wire insulation was captured in the connector instead of the actual wire. Sometimes the wire makes contact down inside, and sometimes it doesn't. I imagine when you swapped the main board, you just unplugged the Phoenix connectors and then re-plugged them rather than re-wiring. The problem would still be there even with a different main board.
Do you have fire alarm relays wired in series with the failsafe? I have seen problems there also. If a fire alarm relay fails to maintain contact, the automation thinks there was a film break.
Hope some of this helps.
Oscar
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