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

» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Equipment Modifications! (Page 2)

This topic comprises 2 pages: 1  2

Author Topic: Equipment Modifications! Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 02-21-2007 09:01 PM                     Intermittents are designed for a certain layer, or "cushion" of oil between the star and cam as the radius of the star comes around and re-engages with the cam and weather or not ATF can provide the correct "cushion" is certainly questionable. No manufacturer of intermittent parts in my lifetime has ever reccomended ATF. ATF is really more of a high temperature lube/hydraulic oil than anything else. Wether or not ATF will attack the rubber parts in a Simplex can only be found by taking a chance.... they deteriorate bad enough as it is with just regular oil over not too many years, hopefully ATF won't accelerate that. My biggest bitch here is that someone told him he'd never have to change the lube. That is simply plain bad advice unless he's converting to digital in 6 months or less. Mark  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 02-21-2007 11:59 PM                     Normally if you were to give the main roller a spin, it would spin multiple revolutions. With the same spin, the roller only turns maybe 1/2 revolution. (Again, this should NOT prevent the roller from spinning when film is running through it.) This greatly helps to smooth out the bumpiness from a bouncing platter or feed reel as well as projector vibration. Timecode does track better this way. Just be prepared to change out the paper towel once every year or two. BTW, the thicker the paper towels the better. The best I've found is something UA used to buy called "Value Choice" heavy duty wipes. That is what is shown here (cut down to size, of course). That was of course in the late 90s. Grainger and Home Depot sells some really plush blue colored heavy duty paper towels that should work equally well. Just stay away from generic type paper towels like Bounty, as they are too thin and not soft enough. Maybe next week I'll share the secret for setting up an AW3 for achieving different payout vs. takeup speeds.  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 02-22-2007 02:21 AM                     ...interesting - thus, you've created a roller resistance brake like the outside rollers of a AW3's brain does for the payout. Have to give this a whirl. Plus, one can use this concept if one is wanting to mount a Kelmar cleaner bracket on top the machine with the DTS unit above (have to reset the delay settings in the processor) and thus having this resistive roller in the reader aid in having the film be a little more snug going through the Kelmar when being used with STRONG platters since they have zero tension from platter to projector. Thx for sharing this with us .... - Monte  |  IP: Logged Bill Enos Film God Posts: 2081 From: Richmond, Virginia, USA Registered: Apr 2000 posted 02-22-2007 11:29 PM                     Seems to me projector lubrication would be just about the lightest duty for a lubricant....very low speed, no shock loads, no heat to speak of, constant velocity. ATF is a high stress, high speed gear lube, however, it must be formulated not to interfere with the grip of the grip of the multi plate clutch packs and bands so it may not be the slipperiest stuff possible.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 02-23-2007 02:58 AM                     quote: Bill Enos no shock loads I guess your projectors don't have any intermittents in them..... Mark  |  IP: Logged Tim Reed Better Projection Pays Posts: 5246 From: Northampton, PA Registered: Sep 1999 posted 02-23-2007 08:12 AM                       I have seen ATF used in Brenkerts and it worked surprisingly well, as Century or Simplex oil will bog those mechanisms down. I don't know that I'd use ATF in an XL, though, because it's easy enough to just get the standard-issue stuff.  |  IP: Logged Joshua Waaland Jedi Master Film Handler Posts: 800 From: Cleveland, Ohio Registered: Dec 1999 posted 02-24-2007 10:18 PM                     Brad, Do you think one could make the mods to the Christie platters like you did but with one set of 35mm rollers and the other with 70mm rollers? That way the only things that would need changed to switch between formats would be the rollers on the take up arms and the platter brain.  |  IP: Logged Will Kutler Phenomenal Film Handler Posts: 1506 From: Tucson, AZ, USA Registered: Feb 2001 posted 02-25-2007 02:44 AM                     Other great uses for ATF: Excellent cutting fluid for machining aluminum!!!  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 02-25-2007 03:57 AM                     Joshua, yes that is easily done. I would put the 70mm on the inside though since it would be used less frequently. Good idea, I just might do that to my screening room platter. FYI, you can do the dual takeup as well with different gauges. That way the only thing you would have to change out is the roller on the takeup arm. (If you have the older black rollers, you can actually run 35mm on them, you just have to double check it didn't get twisted during threading.)  |  IP: Logged Joshua Waaland Jedi Master Film Handler Posts: 800 From: Cleveland, Ohio Registered: Dec 1999 posted 02-25-2007 07:42 AM                     I actually do have the older 70mm black rollers. I didn't think of that. Thanks Brad.  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 02-25-2007 07:47 AM                     Actually Brad Joe had a training video on this site years ago that showed how to put 70mm on a regular christie with no fuss at all  |  IP: Logged Joshua Waaland Jedi Master Film Handler Posts: 800 From: Cleveland, Ohio Registered: Dec 1999 posted 02-25-2007 02:18 PM                     I was searching all over Christie's website to try to find the platter in Brad's photo. I wanted to read the specs on it. It took me a minute to realize that he must have come up with the idea. What did you use for spacers between the take up rails? I imagine you could get some round steel stock and drill and tap it inside.  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 02-25-2007 02:58 PM                     I just used aluminum spacers from this website. Remember you need them not only for the spacing of the slide bars for takeup, but also to space out the film cleaner bracket for the primary payout. Be sure and install a small roller on the uppermost of the two film cleaner bolts so if you are feeding on the secondary payout track from the top platter that you don't scratch the film across that top spacer. If you look at that pictures closely, you can see where this was done.  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 02-25-2007 03:03 PM                        We used to stack the trailers on top of the film pack. McDonalds soda straws bent into a inverted vee, kept the film on the feed out arm. (perfect fit) Louis  |  IP: Logged

All times are Central (GMT -6:00)

This topic comprises 2 pages: 1  2

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.