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Author Topic: Platter continuously reverse wraps Manny Montes Master Film Handler Posts: 270 From: United States Registered: Feb 2010 posted 03-24-2010 02:55 AM                     As all booths do, I have one platter that loves messing with me, the top platter will occasionally (once every 2 weeks) backwrap as the control arm in the brain gets stuck forward and keeps the platter turning until it back wraps. We've tried replacing the microswitch because we thought it was getting stuck, but that was no good. Now i'm sitting with a useless top platter and wondering what to do.  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 03-24-2010 03:23 AM                     Are your decks level? get a bubble level and put it across and in line with the tower, for an off-level deck will cause the arm to not work correctly. Also, is the microswitch breaking connection when the arm is dead inbetween those two outer diameter rollers? For if it's opening late, this can also cause backwrap. And you adjust the whole microswitch and don't bend the tang, plus the spring under the tang has to be gone. What about other brains mounted in this one deck? Do they act up the same way? Or, is your units solid mount brains? I've shimmed, or adjusted the feet of many platter decks up to level. -Monte  |  IP: Logged Manny Montes Master Film Handler Posts: 270 From: United States Registered: Feb 2010 posted 03-24-2010 03:39 AM                     I will check how level the decks are when I go in tomorrow, I do know that they are all warped. Old theater and A certain company before mine didn't focus on presentation or projection training. The system has solid mount brains. I'm pretty positive it has nothing to do with the microswitch, however the problem seems to never occur when I am working, and it can't be narrowed down to one person either. For now we aren't using the platter and even when we were I couldn't replicate the issue whenever I threaded it, so it's being very difficult indeed.  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 03-24-2010 04:14 AM                        Top platter?? Probably misthreaded by short person. The giveaway is that it is always the top platter AND it does not happen to you. Louis  |  IP: Logged Manny Montes Master Film Handler Posts: 270 From: United States Registered: Feb 2010 posted 03-24-2010 04:32 AM                     haha, unfortunately it happened with 2 others that are taller than I am. Plus, I can't just kick short people out of booth can I?  |  IP: Logged Joe Redifer You need a beating today Posts: 12859 From: Denver, Colorado Registered: May 99 posted 03-24-2010 05:27 AM                        You didn't even mention what kind of equipment you are working with. That would go a long way towards a solution.  |  IP: Logged John Wilson Film God Posts: 5438 From: Sydney, Australia. Registered: Dec 1999 posted 03-24-2010 05:58 AM                     Ageed. A long way... quote: Manny Montes Plus, I can't just kick short people out of booth can I? No, they'll kick you in the ankles.  |  IP: Logged Ian Parfrey Phenomenal Film Handler Posts: 1049 From: Imbil Australia 26 deg 27' 42.66" S 152 deg 42' 23.40" E Registered: Feb 2009 posted 03-24-2010 06:29 AM                     ... or bite your toes off.  |  IP: Logged Michael Voiland Expert Film Handler Posts: 219 From: Naperville, IL US Registered: Aug 2009 posted 03-24-2010 09:51 AM                     I am guessing Strong / Potts platters with a fixed brain.... We have a few of those that like to cause trouble.  |  IP: Logged Jim Cassedy Phenomenal Film Handler Posts: 1661 From: San Francisco, CA Registered: Dec 2006 posted 03-24-2010 12:28 PM                     quote: Louis Bornwasser Top platter?? Probably misthreaded by short person. Oh really? I had the same problem on a bottom platter deck caused by tall people threading who were too lazy to bend all the way over to check their work. But seriously- - check the platter deck level as others have suggested. Especially if it's a STRONG platter. They seem to be pretty picky about any degree of tilt. I had the same problem till I found mine was off level. Curiously, I have at least one which works better when it's NOT level. I've never figured out why and I don't intend to. I have an "If it works, don't muck with it" attitude about this one. It works great when the back (column) end is slightly elevated in relation to the other two legs. But if I "level" it, like the others, it gives me all kinds of problems. Go figure. . . .  |  IP: Logged Richard Hamilton Phenomenal Film Handler Posts: 1341 From: Evansville, Indiana Registered: Jan 2000 posted 03-24-2010 12:35 PM                     Have you actually witnessed the control arm sticking and causing the wrap, or do you just happen to catch it after its wrapped enough times it wont move?  |  IP: Logged Manny Montes Master Film Handler Posts: 270 From: United States Registered: Feb 2010 posted 03-24-2010 12:46 PM                     I've never caught it myself even, others just told me that its wrapping and its because the arm is sticking. Its only a 5 plex so we never have a "dedicated projectionist" to stay in booth all day (shame really), they would catch it after the failsafe has cut the show.  |  IP: Logged Tony Bandiera Jr Film God Posts: 3067 From: Moreland Idaho Registered: Apr 2004 posted 03-24-2010 01:13 PM                     Simple solution: Replace that Strong piece of with a Christie AW3R. Good used ones can be had for around $500  |  IP: Logged John T. Hendrickson, Jr Jedi Master Film Handler Posts: 889 From: Freehold, NJ, USA Registered: Apr 2001 posted 03-24-2010 01:14 PM                     If it is an old Potts, you may want to check the bearings in the post of the arm. If they are bad, they will prevent the smooth movement of the arm. They may need to be replaced. I have had occasion to do this.  |  IP: Logged Manny Montes Master Film Handler Posts: 270 From: United States Registered: Feb 2010 posted 03-24-2010 01:28 PM                     Trust me, I wish I could replace a lot of things in our booth, however I'm constrained by a megacorporation. We've had a blown amp for 2-3 months now, still no replacement... I'll check that the bearings are ok, considering the age of the platter that might be it as well  |  IP: Logged

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