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Author Topic: Platter continuously reverse wraps Chris Slycord Film God Posts: 2986 From: 청주시, 경북도, South Korea Registered: Mar 2007 posted 03-24-2010 01:54 PM                     Also check that the area underneath the speed control arm is nice and flat. I remember having one strong brain where the control arm would get stuck because the metal underneath it had a raised spot. It started to wrap, then got enough tension to pull the arm past the raised spot and get rid of the wrap. And it did it throughout the show and was definitely easy to fix. Then again, the incident isn't reproducing when you thread, so it's likely not that.  |  IP: Logged Richard Hamilton Phenomenal Film Handler Posts: 1341 From: Evansville, Indiana Registered: Jan 2000 posted 03-24-2010 02:18 PM                     WHAT MAKE AND MODEL OF PLATTER? At least give us a hint...what color is it?  |  IP: Logged John Wilson Film God Posts: 5438 From: Sydney, Australia. Registered: Dec 1999 posted 03-24-2010 03:18 PM                     No, it's more fun to guess.  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 03-24-2010 04:11 PM                     Interesting of that "the others" mentioning of this problem and not "Mr. Manny" here ... ..are stories being told...? But, what I can see, if they have the old brains, that center roller is NOT held down by a screw or an "E" clip as does the later models. Thus, that roller has an easy chance of riding up on the shaft and wedging itself under this arm....and THAT, I've seen many times, esp with booth personnel setting aside brains that are presumably dead, but that roller has just simply wedged itself under the arm. ..and no effort in trying to take any sort of inititave of remedying any problem....which it looks like the case here. -Monte  |  IP: Logged Sean McKinnon Phenomenal Film Handler Posts: 1712 From: Peabody Massachusetts Registered: Sep 2000 posted 03-24-2010 04:33 PM                        quote: Manny Montes We've had a blown amp for 2-3 months now, still no replacement There really is no excuse for that... FYI guitar center repairs amps.  |  IP: Logged Michael Voiland Expert Film Handler Posts: 219 From: Naperville, IL US Registered: Aug 2009 posted 03-24-2010 04:43 PM                     I would rather jump off the roof then go to guitar center . If its a QSC have it sent to the factory. At least you can get by on a blown amp. 5 of our 9 theaters only have one amp. Center surround is bad. All strong platters. WD40 works wonders if you can take apart the brain clean all the crap out of the bearings with compressed / canned air and wd40 then take a towel and rub the over spray off. Works ok on our platters i am not sure if it will work for you.  |  IP: Logged Sean McKinnon Phenomenal Film Handler Posts: 1712 From: Peabody Massachusetts Registered: Sep 2000 posted 03-24-2010 04:55 PM                        When I was a tech in Boston we used to send them to Manchester NH to get repaired by a chain called "Daddy's Junky Music" I am not sure if they are just a New England chain or not but they did pretty decent work at a reasonable price. They were fast too.  |  IP: Logged Manny Montes Master Film Handler Posts: 270 From: United States Registered: Feb 2010 posted 03-24-2010 05:18 PM                     Sorry about the late response, at work right now. The platter and everything is level, there is no raised spots underneath the control arm. I checked the control arm and it continually swings smoothly and clicks the microswitch at just the right position. It is an old Balco platter (3 platter).  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 03-24-2010 05:53 PM                     OKEY ! That explains the whole problem. BALCO's are the predecessor to the present STRONG ALPHA platters and made in the early 80's. They have same design (nifty use of a switch on the motor for the controls of rewind and makeup with the actual manual control of unplugging the motor from the arm and connecting it to the MUT to do the builds...), same vacuum motors to drive the platters, et.al, but uses a cable from the variac to the trombone instead of the rod. BUT, their brains are totally much to be desired: The same design as the present STRONG brain,but they use, what's called a snap action roller switch which has a much shorter arm with a roller on it that rides against the pin on the control arm. The lever action is much coarser than the present easier tang snap switch and it's very easy for backwrapping to occur. What I've done is to disassemble the control plate from the platter arm and redrill the plate to accept the more common snap action microswitch kit since it's mounted in a different position on the plate. After this mod, the backwrap issues totally disappeared with these BALCOS.. -Monte  |  IP: Logged John Wilson Film God Posts: 5438 From: Sydney, Australia. Registered: Dec 1999 posted 03-24-2010 06:01 PM                     quote: Manny Montes It is an old Balco platter (3 platter). There...that didn't hurt. quote: Monte L Fullmer BALCO's are the predecessor to the present STRONG ALPHA platters There's your problem right there.  |  IP: Logged Manny Montes Master Film Handler Posts: 270 From: United States Registered: Feb 2010 posted 03-24-2010 06:41 PM                     Alright Monte, I will have to try that mod. and yeah, sorry about not naming the brand and stuff, I've got 5 projectors with 4 different platter systems and I couldn't remember off the top of my head which was #3.  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 03-24-2010 10:40 PM                        Boy! Whomever is responsible for causing that train wreck should be whipped with a wet noodle! Never have dissimilar units in the same building unless they are close. btw: the Strong/Potts platters are just fine, easy to fix, and cheap to buy/repair. The older unit can be easily converted to a nearly new model (or you can do-it-yourself like Monte describes. . . . buy one new "brain" and then you will know what to do.) Louis  |  IP: Logged Manny Montes Master Film Handler Posts: 270 From: United States Registered: Feb 2010 posted 03-24-2010 11:27 PM                     Yeah, it was a single, the expanded to a twin and is now 5 theaters. So there is a lot of dissimilar equipment. Each projector is threaded a different way as well, due to space constraints and platter position. One projector is threaded through its base.  |  IP: Logged Michael Voiland Expert Film Handler Posts: 219 From: Naperville, IL US Registered: Aug 2009 posted 03-25-2010 01:51 AM                     Don't worry lots of people are in that boat. Due to cheapness or expansion or both. We currently have pro 35s a single turreted simplex and 4 simplex 35's 2 versions of the strong platters 4 types of lamp house and 5 different sound system setups with 2 types of processors. It adds up to a heck of a lot of training. Good luck with the brains on your platters.  |  IP: Logged Joe Redifer You need a beating today Posts: 12859 From: Denver, Colorado Registered: May 99 posted 03-25-2010 02:14 AM                        It must be hell training someone in that booth. I get frustrated in mine because we have Simplex XLs as well as Milleniums, and the top loop size must be smaller on the Milleniums. Not only that, but we have BACP Dolby Digital penthouse readers as well as Dolby Cat 702 readers and the BACP requires more tension than the Dolby proper readers. I won't even get into the automation differences. It's a pain.  |  IP: Logged

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