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

» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » V5 tourelle that doesn't spin

Author Topic: V5 tourelle that doesn't spin Antonio Marcheselli Phenomenal Film Handler Posts: 1260 From: Florence, Italy Registered: Mar 2000 posted 04-14-2004 04:40 PM                        Hi everyone. My problem: V5 consolle 7040 that sometimes (often!) doesn't change lens. The tourelle locking mechanism is mechanical locked and the magnet has no enough strenght to unlock it and let the motor spin the turret and I have to push the magnet's button by hand. The fun thing is that if I turn off the projector and I sping by hand the turret the locking mechanism is always free and has no signs of resistance also if I rotate the turret with strenght. To me seems a mechanical problem and not an electric problem. The space between the turret and the holder's has been checked and are normal. I realize that it is not easy to explain, but has anyone else had this kind of problem? Bye Antonio  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 04-14-2004 05:12 PM                     It may be that the solinoid that operates the locking mechanism isn't turning off which would explain why it is free when the system is off just a thought  |  IP: Logged Antonio Marcheselli Phenomenal Film Handler Posts: 1260 From: Florence, Italy Registered: Mar 2000 posted 04-14-2004 06:36 PM                        no the solenoid works properly, it just doesn't have the strenght to unlock the mechanism that lock the turret. I can feel the resistance when I operate the mechanism by hand (without solenoid installed for test) Bye A  |  IP: Logged Demetris Thoupis Phenomenal Film Handler Posts: 1240 From: Aradippou, Larnaca, Cyprus Registered: Apr 2001 posted 04-15-2004 12:11 AM                     Get a Manual Turet It might be the actual turret. If you have another projector exactly the same, go a bit early and exchange it with another. That will narrow down the problem solving. D  |  IP: Logged Antonio Marcheselli Phenomenal Film Handler Posts: 1260 From: Florence, Italy Registered: Mar 2000 posted 07-04-2004 10:52 AM                        I discovered again this thread just to explain my "solution" and to discuss it with you. So, I found that the problem was caused entirely by the locking mechanism that was so locked that the solenoid does not have the necessary strenght to unlock it. I made all type of tests, I found that the microswitch that stops the motor is very late on the tourelle so the motor continues to spin for a 1/4 before stopping when the locking mechanism is already engaged. I found that on some projectors the belt slip on the tourelle, on some other ones the belt slips on the motor gear, on some other ones... the belt does not slip... I was teached to set the belt tension very high, higher than the maltese-shutter belt. I found that every projectors has to be set in different way instead. I checked "by hand" the strenght of each tourelle when moving. I found that I have projectors where to have a "regular" strenght (that permits the tourelle to spin with no problems but no more) the belt has to be very tight, other ones where to have the same strenght the belt can stay muuuuch less tighthen. I believe that this is caused by belt wear or similar... So I adjusted the tension of every tourelle so that the strenght of the spin is high enough to terminate the job but no more. The problem disappeared on all machines. What do you think?  |  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.