Film-Tech Forum ARCHIVE: Kelmar Failsafe to Component Engineering Automation Wiring

This is topic Kelmar Failsafe to Component Engineering Automation Wiring in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

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Posted by Matthew McBride (Member # 6598) on 01-19-2014, 02:45 PM:

I recently got a Kelmar 2335/3H 3-7 cue detector and I want to use it with my current automation, the CE TA-10 automation. Looking at the diagrams I wasn't quite sure how to wire it. Has anyone done this or know how to do it? Thanks.

Posted by Robert E. Allen (Member # 1351) on 01-19-2014, 03:18 PM:

I must have the only manual platter system in the country. I DO have a fail-safe but it's not attached to anything so I by-pass it. Frankly, I like it this way. The only thing that would be better is a two projector change-over system.

Posted by Brad Miller (Member # 2) on 01-19-2014, 03:47 PM:

The failsafe should at minimum be connected to shut down the projector if the takeup fails for some reason. Even my manual changeover setups all have that bare minimum feature. The use of actual cues are purely optional, but you will agree the first time you walk into the booth and find a mile or two of film piling onto the floor. [Wink]

Posted by Mark Gulbrandsen (Member # 72) on 01-19-2014, 07:33 PM:

As far as failsale there is no electrical difference between the CE detector and the Kelmar. Both provide N.O. or N.C. contacts so it just depends on what your automation requires. The CE cue detector works via a relay and the Kelmar via a microswitch. Between the two the Kelmar cue detector wins hands down but today's microswitchs are very flakey and don't last as long as the old ones with cadnium in the contacts do.

Mark

Posted by Matthew McBride (Member # 6598) on 01-21-2014, 10:01 PM:

I figured out the power and failsafe part. So basically I'll just have to figure out how my automation is setup to wire the cue detector part up, this is what I gather.

Posted by Ed Inman (Member # 2583) on 06-09-2014, 07:30 PM:

Reviving this topic for a moment, is there a reliable product, lacking a full automation unit, to wire a failsafe to shut off the motor (when one or both arms fall) without running the full AC load of the motor through the tiny microswitch? A relay switch of some sort? Thank you in advance for any suggestions.

Posted by Louis Bornwasser (Member # 3063) on 06-09-2014, 09:21 PM:

Yes, we provided a 12 volt transformer, suitable relay and a switch to do that in drive ins. (6 volt on XLs so that you could use the same transformer for the projector lamp bulbs).

Posted by Sam D. Chavez (Member # 1841) on 06-09-2014, 11:07 PM:

I believe Ed was asking if there is such a device one can buy now. I bet Louis has one somewhere.

Posted by Ed Inman (Member # 2583) on 06-10-2014, 09:36 AM:

Yes, that sort of setup sounds exactly like what I'm looking for. Any leads appreciated.

Posted by Ed Inman (Member # 2583) on 06-10-2014, 08:00 PM:

As an addendum, I took a closer look at my switch that failed and it was only rated at 3 amps. Until I can get a better automation system I'm going to try replacing it with the V3L-2102-D8 switch rated at 10 amps. Hopefully that one should hold up better under the load of the motor. I'm also thinking about connecting a bell to the "live" terminal when the handles drop as an extra safety precaution.