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

» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Christie horizontal weave

Author Topic: Christie horizontal weave Phil Ranucci Expert Film Handler Posts: 236 From: Carpinteria,CA, United States Registered: May 2006 posted 04-22-2012 12:33 AM                     I've got a few old GPC Christies with the shutter gear box and the reversing gears on the intermittent. One machine has a really bad horizontal weave. I reset the lateral guides with the Christie tool (twice) and no improvement. I then swapped a gate from a steady machine and with the gate from the steady machine it was still unsteady. What else besides lateral guide rollers causes weave? Any ideas?  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 04-24-2012 09:07 PM                     Can you see the weave in the aperture opening? How's the tooth belt running the assembly - new or tired? Is this the one where the plastic gear is driving the intermittent assembly, and if so, is there paper thickness between the two gears?  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 04-27-2012 07:13 PM                     Constant smooth weave or random violent side to side movement?  |  IP: Logged Randy Stankey Film God Posts: 6539 From: Erie, Pennsylvania Registered: Jun 99 posted 04-27-2012 09:02 PM                     If the intermittent sprocket isn't perfectly aligned with the film trap it can cause weave. The film isn't being pulled straight down through the trap, causing it to "pinball" off the guides and/or the guide wheels. Check to see that the trap is inserted and fastened properly and that the sprocket is correctly aligned. An improperly aligned intermittent pad shoe can also cause horizontal weave and/or vertical jitter. (Jitter being the most likely.) Sometimes, you need an alignment tool to make the adjustment. Other times you can use a steel straight edge. If neither of those are available, you can take a piece of film, trap it in the gate and use that to align the sprocket. Using film to align the sprocket should be considered the least accurate. A straight edge is second best. If you can get an alignment tool for your projector, that would be the best. If I remember correctly, Christie does (or did) make one for their projectors. This device, if it can be had, would most likely be the property of your theater's technician. It's probably best to call your tech, anyway.  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 04-29-2012 05:37 PM                        If the small ruby lat guide roller bearings are missing, you would get weave. Louis  |  IP: Logged Phil Ranucci Expert Film Handler Posts: 236 From: Carpinteria,CA, United States Registered: May 2006 posted 04-29-2012 07:11 PM                     It's a smooth weave. The belts are about 2 years old.Gears are set to quietest point. I'm pretty sure the rubies are present, when I'm there next I'll check, and also check the intermittent sprocket. Thanks!  |  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.