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

» Film-Tech Forum ARCHIVE   » Operations   » Ground Level   » Harry Potter and the Projector on Fire

Author Topic: Harry Potter and the Projector on Fire Ron Keillor Expert Film Handler Posts: 166 From: Vancouver, B.C. Canada Registered: Jul 2003 posted 11-19-2005 01:52 AM                     Dunbar Vancouver midnite show of Harry Potter* was interrupted at /about 0230 when there was a projector malfunction and the film was seen to burn on screen. This was fortunately after the climax of the film, but full refunds were issued. There had been local TV coverage for the screening,so it made this evening's news. The only inside captures of the event were on cellphones.  |  IP: Logged Matt Fields Jedi Master Film Handler Posts: 545 From: Ohio, United States Registered: Jun 2005 posted 11-19-2005 07:59 AM                     Brainwrap  |  IP: Logged Steve Scott Phenomenal Film Handler Posts: 1300 From: Minneapolis, MN Registered: Sep 2000 posted 11-19-2005 01:42 PM                     Same thing reportedly happened at the nearby Apple Valley Carmike during the midnight screening of EP3. 500-some passes issued. We did a 9 screen interlock at Lakeville with no problems  |  IP: Logged Phil Blake Jedi Master Film Handler Posts: 558 From: esperance western australia Registered: Nov 2003 posted 11-27-2005 03:40 AM                        We often experience the odd "film Burn" situation here. Our local power supply is very "up an down" and when the slightest power fluctuation happens the projector motors stop but the dowser and zippers remain open and the lamp continues to burn . The panalogic seems to not detect that the motors stop and everything gets smokey until we manually shut them down.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 11-27-2005 08:24 AM                     The Panalogic and other automations with DC power are not going to "see" power fluctuations the way AC automations are due to the filtration in the power supply. It will take longer for it to die down. The motors on your projectors...are they "pulse" or "latched". If latched, I would be surprised that the motor is dropping out since the automation has control over that...if it is latched, then yes, the automtion would not be aware of the problem. There are many ways to attack the problem...including setting up a self latching relay on the automations such that if power dies...the automations lose power until it is reset. However, I think other alterntatives exist....you could use the lamphouse sense line with a relay across the projector motor to interrupt the lamphouse signal such that if the motor is not running, the automation sees a lamphouse fault and shuts the show down. Even if you are not using the lamphouse sensor, you could use the relay on that A/D converter input for a motor sense. If you have pulsed motor logic, like Kinoton, then convert to latched is another potentially easy solution (for Kinoton, no new parts or wiring are needed).  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 11-27-2005 10:06 AM                        I am surprised that the automation in use does not have a speed sensor to eliminate this kind of thing. It is required equipment on many non-US installations, such as all of the old Cinemation units. Louis  |  IP: Logged Pete Naples Phenomenal Film Handler Posts: 1565 From: Dunfermline, Scotland Registered: Feb 2001 posted 11-30-2005 06:48 AM                     Indeed, in parts of the UK, where ACOP regulations are in force, the equipment must shut down if the projector runs under speed.  |  IP: Logged Phil Blake Jedi Master Film Handler Posts: 558 From: esperance western australia Registered: Nov 2003 posted 12-11-2005 02:29 AM                        Iam not certain how the motors are connected , but they can be started by switch on consol or by "motor on" softkey on the panalogic. , projectors have film sensors which will not allow the automationto start the projector if it has no film , so i imagine the automation has some control over the motrs , just nothing to "see" if the motors stop running. I am wondering if all these brushless motors stop straight away when the main voltage drops suddenly. and yes we do have lamp sensors in the xenons.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 12-15-2005 05:03 PM                     Speed sensors aside it would also be very easy to incorporate a power line sensor to shut the c/o and projector down. Similar to how a UPS senses the incomming power. Mark  |  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.