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

» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Wrap detector for Strong Platters

Author Topic: Wrap detector for Strong Platters Joe Redifer You need a beating today Posts: 12859 From: Denver, Colorado Registered: May 99 posted 09-26-2002 08:34 PM                        I am having a problem with my wrap detectors for my Strong platters. They work, but it takes at least 30 wraps or more before it trips the switch. I know what you're thinking.... "Loosen the thumbscrew, moron!". Trust me, it is all the way loose. Is there any way to make these more sensitive? Ideally I'd like it to trip at around 10 wraps max. What's the point of a wrap detector if your film can still wrap like crazy?  |  IP: Logged Tim Sherman Expert Film Handler Posts: 125 From: North Ridgeville, OH, USA Registered: Aug 2000 posted 09-26-2002 09:14 PM                        Maybe you should try taking the spring out of the microswitch. like you would on the microswitch for the payout assembly. I haven't tried this yet but just an idea. And my potts do and did wrap that much right out of the box.  |  IP: Logged Paul G. Thompson The Weenie Man Posts: 4718 From: Mount Vernon WA USA Registered: Nov 2000 posted 09-27-2002 12:15 AM                     I agree with Tim.  |  IP: Logged Darryl Spicer Film God Posts: 3250 From: Lexington, KY, USA Registered: Dec 2000 posted 09-27-2002 02:11 AM                    Hmmmmmmm, these wraps surely are not being caused by static. You are using film guard right.  |  IP: Logged Wes Hughes Expert Film Handler Posts: 175 From: Raleigh, NC, USA Registered: Aug 2001 posted 09-27-2002 03:25 AM                     30 wraps is really not that much. It takes a lot more than that on a Strong platter with bumpers around the brain to even begin to bind and cause problems. If you take the spring out it may actuate too easily...ie, you may have to thread up really slowly (not the projector, obviously, but when pulling the film to and from the platter) to keep the switch from opening. Just guessing though. I don't have any problem with 30 wraps.  |  IP: Logged Sean McKinnon Phenomenal Film Handler Posts: 1712 From: Peabody Massachusetts Registered: Sep 2000 posted 09-27-2002 03:47 AM                        Ive never had this problem actually my problem was they went off to easile when threading etc... My solution is to soak the failsafe in a bucket of film gaurd and if that doesnt work then remove the spring from the microswitch  |  IP: Logged Paul G. Thompson The Weenie Man Posts: 4718 From: Mount Vernon WA USA Registered: Nov 2000 posted 09-27-2002 03:54 AM                     Joe, what kind of pay-out heads do you have in those things?  |  IP: Logged Joe Redifer You need a beating today Posts: 12859 From: Denver, Colorado Registered: May 99 posted 09-27-2002 04:54 AM                        The wraps are being caused by me turning the payout platter OFF and counting how long it takes before it shuts down. I haven't had a legitimate wrap yet.  |  IP: Logged Christopher Duvall Jedi Master Film Handler Posts: 500 From: Denver, CO Registered: Dec 1999 posted 09-27-2002 05:29 AM                     Maybe you could use a spring with more give. Kind of like a compromise.  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 09-27-2002 06:15 AM                     Well Joe, I would assume your platters have the same failsafe that the ones I have been working with lately. Funny yours won't shut down quickly enough, mine shut down too quickly. If a trailer drop is performed using one of those Goldberg collapsible trailer reels, it will run for a couple of seconds and kill power to the platter. The operators have to put it in bypass, wait for it to get going and then turn the switch back to run after about 20 seconds. I haven't had the time to really bother to look at it, because it isn't THAT much of a deal, but I'm betting that changing/removing the spring as well as bending the actuator arm will make them more or less sensitive. My biggest complaint about them is when I personally string up a film. By the time I am at the takeup elevator, the power has shut down. Since mine will allow the microswitch to be tripped for something like 4-5 seconds before it cuts power, I am wondering if there is something in the setup software that I could change to, say 10 seconds. That would certainly solve my problems. By the way, does yours shut down instantly upon the microswitch opening? Then again, mine are SCDC and yours are Phase Control. Perhaps there is something there?  |  IP: Logged Joe Redifer You need a beating today Posts: 12859 From: Denver, Colorado Registered: May 99 posted 09-27-2002 10:19 AM                        Mine are wired directly to the variac failsafe switch. When the wrap detector trips, the platter thinks that the elevator has dropped and shuts off the motors. It does not kill power (as the lights are still on, etc). I would assume yours are wired the same way. The newer platters have a wire that comes up to the top of the tree and the wrap detector is connected there, but that wire is still wired directly to the variac switch. Mine let me thread them completely with no problem. And yes, they shut down instantly. I just don't like 30 layers or more of film rubbing against itself.  |  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.