my profile | my password | search | faq & rules | forum home

» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Help with Cooperator and curtain controls

Author Topic: Help with Cooperator and curtain controls Bernie Anderson Jr Master Film Handler Posts: 435 From: Woodbridge, New Jersey Registered: Apr 2000 posted 04-12-2008 02:44 PM                        Hi Guys, I'm working with a Eprad Cooperator and I'm trying to hook up a curtain control using a DPDT solenoid switch. The switching of the curtain will work fine, but what I need to do is power a 24vac solenoid (coil) using the inboard cue. At terminals 21 & 22 there is no 24v and I'm getting around 5v across the terminals and 0 when the cue goes through. Again, my only problem is I just need to energize the coil through the inboard cue foil. Any suggestions? Thanks Bernie  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 04-12-2008 06:03 PM                     You could use a small 5 volt DIP relay to be operated by the inboard cue and that in turn would operate the larger curtain solenoid. What ever you end up doing it will probably have to be one or two extra relays before the curtain relay. Mark  |  IP: Logged Rick Raskin Phenomenal Film Handler Posts: 1100 From: Manassas Virginia Registered: Jan 2003 posted 04-12-2008 06:12 PM                     Mark, I was thinking the same thing. But wouldn't the 5V relay be energized most of the time and only de-energize when the cue foil is detected? I would think you would want the opposite behavior. You could use a relay with a set of contacts that close when the relay de-energizes, but I'd be concerned about the effect constant current in the relay coil.  |  IP: Logged Bernie Anderson Jr Master Film Handler Posts: 435 From: Woodbridge, New Jersey Registered: Apr 2000 posted 04-12-2008 06:18 PM                        I was thinking the same thing, but was hoping that I could get away thing something else.  |  IP: Logged Bernie Anderson Jr Master Film Handler Posts: 435 From: Woodbridge, New Jersey Registered: Apr 2000 posted 04-14-2008 09:13 PM                        Since I'm not relying on the automation for any curtain control (the curtain would only be controlled by a cue), can I just take the inboard cue out of the automation wiring and wire it directly to the coil via a transformer and relay? What's the voltage at the cue sensor? Any suggestions?  |  IP: Logged

All times are Central (GMT -6:00)

Printer-friendly view of this topic

Hop To: Select a Forum: Category: Operations -------------------- Digital Cinema Forum Film Handlers' Forum Large Format Forum Ground Level Feature Info, Trailer Attachments & REAL Credit Offsets Category: Community -------------------- Film-Yak Film Handlers' Movie Reviews The Afterlife Bob Maar's Joke-A-Thon Category: Classified -------------------- Equipment and Supplies Wanted/For Sale Help Wanted/Seeking Employment Category: System -------------------- Software Beta Testing Forum

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.