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Author Topic: 16mm Film Transport Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 02-09-2003 10:42 AM                     Actually the Eiki slip clutches I'm familiar with depend on the total weight of the reel for the slip. Hence, the heavier the reel gets, the more tension there is on it. A really piss poor design. They are nothing like the standard theatre 35mm slip clutch......plus the parts to fix the clutch were nla. Mark  |  IP: Logged John Spooner Expert Film Handler Posts: 186 From: South Australia, Australia Registered: Jan 2003 posted 02-09-2003 10:51 AM                     Dear Paul. If you have no luck in your quest for a large spool system and a projector, I have 2 Bell and Howell Zenon projectors and a large spool unit here you can make an offer for. The only thing you will need to find are some 6000ft spools, otherwise it runs very well and would be good for your needs. John Spooner. Adelaide.  |  IP: Logged Ken Layton Phenomenal Film Handler Posts: 1452 From: Olympia, Wash. USA Registered: Sep 1999 posted 02-09-2003 12:26 PM                     There are pictures of the Atlantic Audio Visual units on www.film-center.com under "Quick Tips". I felt that Atlantic did a good job with their conversions.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 02-09-2003 12:27 PM                     The Toshiba Devices I need for the Eiki Power supply are 2SC2650. I'd like to get 4 of them if anyone knows where they might be available...... I believe that the casing is obsolete on these devices..... Mark  |  IP: Logged Adam Fraser Master Film Handler Posts: 499 From: Houghton Lake, MI, USA Registered: Dec 2001 posted 02-09-2003 01:11 PM                        Mark, A quick search turned this up. http://www.angelfire.com/biz/techsonic/page8.html They have them for about $12.00 each  |  IP: Logged Steve Kraus Film God Posts: 4094 From: Chicago, IL, USA Registered: May 2000 posted 02-09-2003 03:08 PM                    B&H portables and the Hortson pedestal are among those that also use reel weight for a clutch (by having the entire spindle being able to move slightly and hang on a cloth belt. It makes sense...while you want more slippage with a full reel you probably need more torque to turn it. Mark is inferring that it's working exactly backwards from what it ought to be and I don't think that's true. On the contrary I think it's working exactly right which is why several makes use that system. It would be interesting if someone could do a test to see which is true.  |  IP: Logged Tim Reed Better Projection Pays Posts: 5246 From: Northampton, PA Registered: Sep 1999 posted 02-09-2003 03:20 PM                       Cinemeccanica V-18s and Towers work that way, too, Steve. The more weight accumulates, the more torque applied to turn it.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 02-09-2003 03:28 PM                     Sure they do but that type of clutch is not very good, nor reliable. Overall film tension is then based on the empty weight of the film reel. Too many variables there. Those that have used a servo controled tower, or MUT understand. Anyway, 96% of all theatre type take up clutches were of the slip type anyway. The other few percent account for weight controled type, and independently motor driven take ups. There were very few of both of these combined. Other than studio, or foreword/reverse machines I can't think of any theatre type that had servo controled take ups. Adam, Thanks! I too found that source and will call them tommrrow. Mark  |  IP: Logged Gordon Bachlund Jedi Master Film Handler Posts: 696 From: Monrovia, CA, USA Registered: Aug 1999 posted 02-09-2003 03:31 PM                        I have an older B&H classroom machine that we converted to 6k reels by mounting 16mm dubber drives (torque motors) on each side of an A-V cart. The projestor, also mounted to the cart, was modified to remove the incandescent lamphouse and permit the use of a 900-watt Xenon lamphouse. Guidance rollers affixed to this Rube Goldberg lashup convey the film. I used it for two screenings late last year, and, while it was no beauty, it worked flawlessly. And, it's much lighter than the Eprad Sword lashup that we use for portable 35mm screenings with 12k reels! Don't be afraid to be innovative.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 02-09-2003 03:34 PM                     Good idea Gordon! That also allows constant tension on take up, and feed out as the Sword would since they are usually eddy current motors.....Hey, did you put 300 watt lamps on them:)? I still think a platter would work out really well to run 16mm, and would be really reliable, and extremely easy on the film. Mark  |  IP: Logged Tim Reed Better Projection Pays Posts: 5246 From: Northampton, PA Registered: Sep 1999 posted 02-09-2003 03:41 PM                       quote: Sure they do but that type of clutch is not very good Well, I didn't say that.  |  IP: Logged Gordon Bachlund Jedi Master Film Handler Posts: 696 From: Monrovia, CA, USA Registered: Aug 1999 posted 02-09-2003 06:09 PM                        Mark, the Sword is unmodified except for removal of the "automation" to make it a manual transport with selector switches for operating mode. The ballast lamps were not changed, so I assume they are still 200W. The Sword has behaved remarkably well every time we've used it, and winds nice and tight without overdoing it. If I didn't have an FP-16 for my future screening room I would seriously consider a platter. The B&H lash up and the Sword are for "special venue" screenings.  |  IP: Logged Paul Trimboli Master Film Handler Posts: 274 From: Perth Western Australia Registered: Dec 2002 posted 02-10-2003 07:04 AM                     Thanks for your replys! Brad I love your platter idea, I had though of something like that after watching the Fort Worth OMNI tour and seeing the IMAX platter that require reqinding, much simpler to build. I had thought though that placing the platters over each other like a modern 35mm system that it would take up much less space. Building this system is probably going to be cheaper the build a 6000" spool system since one 6000" reel is gonna cost me like $90 AU, and I will need more then one for obvious reasons! Brad what did you mean by having a dirrect drive system ment you did not have tension problems? How did you make the films onto the platter? John Spooner, not sure what a good price would be, how much would you sell one for? Anyone in Australia have any good 16mm equipment such as splicers? Is making up a 16mm film the same as 35mm as in does it come on smaler reels that you put onto a biger reel? Building some AMPs this week end if I get time, found some 100watt amp kits that are perfect and on sale, then going to design the speakers, just looking for some good drivers that are well priced!  |  IP: Logged Leo Enticknap Film God Posts: 7474 From: Loma Linda, CA Registered: Jul 2000 posted 02-10-2003 08:05 AM                        quote: Is making up a 16mm film the same as 35mm as in does it come on smaler reels that you put onto a biger reel? If you want to run an entire feature using one projector without a break, yes. 16mm features (in this country, at least) were usually supplied in 1,600 foot reels, which is the equivalent of two 2,000 foot reels of 35mm. So a 16mm feature usually comes on 2-4 reels, depending on how long it is. A 6,000 foot spool will hold about 150 minutes of film, and so is fine for most features. The inbuilt spool capacity of most portable projectors is 2,000 feet; some of the larger, xenon-powered models designed to be used in permanent installations can take 6,000 foot spools.  |  IP: Logged Robert E. Allen Phenomenal Film Handler Posts: 1078 From: Checotah, Oklahoma Registered: Jul 2002 posted 02-10-2003 08:16 PM                     Paul: I have an Eiki 1500 300w xenon machine which has been professionally modified with a slip-clutch mechanism and runs 6000 foot reels. It is not in use at this time and I can let you have it (complete with power supply, carrying cases, rewinds, reels and splicer) for $2000.  |  IP: Logged

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