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Author
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Topic: diameters of large reels
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Greg Mueller
Phenomenal Film Handler
Posts: 1687
From: Port Gamble, WA
Registered: Jun 99
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posted 08-25-2000 12:18 PM
Reels come in sizes up to 48" (that I've heard of). The large reels have a 1/2" spindle hole while the regular "house reels" have 5/16" spindle holes. Your 26" reels will probably hold 1/2 a feature. 32"-36" will hold a full feature. The slipping ability of the edges (sounds like Goldbergs to me) are so that when the projector starts up, it doesn't have to overcome the inertia of getting those sides revolving along with all that film, all at once. The sides can "catch up" latter. For collectors, reels make sense as they provides a place to store the film when not in use. A feature can be brought out run, and put away quickly, without having to make up and break down the print. Commercial theaters run one feature for a period of time so they can leave it on the platter, and only make it up and break it up once. 36" reels are a fairly common size and I use them for my home theater. To get your 26" reels to work, just take the cans off your take up and feed arms. You might have to put little blocks in between the arms and the projector so the reels will clear. You also will start running into clutch adjustment problems on your take up arm with the bigger reels.------------------
Greg Mueller
Amateur Astronomer, Machinist, Filmnut
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Bruce McGee
Phenomenal Film Handler
Posts: 1776
From: Asheville, NC USA... Nowhere in Particular.
Registered: Aug 1999
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posted 08-25-2000 01:06 PM
I am aquiring some 24" Goldberg floating hub reels with 5/16" centers. To use them on the Holmes, I will have to come up with some type of fire roller replacement because the roller is part of the feed and take-up magazine assemblies and will only do the 2000' thing.Another thought is running times. The single Holmes gets rather hot running reels continuously. When used for changeovers, it has a 20 minute break between run times. I was told that my 24" reels are 5000'-ers by David Koegel, so if this is wrong, blame him.  So I could run 60 minutes before stopping the thing. Is there something to be said for being on too much? The motor gets warm, but not too hot to touch, but I havent run it non-stop for an hour with the lamp blazing, though. If you've seen a Holmes, you know that there is just a square hole in the top and bottom of the machine and the fire rollers on the mags are inserted there. I also doubt that there is a theater in the USA using Holmes. If there is one, please admit it and tell me. Thanks
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Bruce McGee
Phenomenal Film Handler
Posts: 1776
From: Asheville, NC USA... Nowhere in Particular.
Registered: Aug 1999
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posted 08-25-2000 08:17 PM
Thanks Greg.The Holmes has bearings that have to be oiled weekly with regular use, and grease that should be checked every 200 hours or so of use. I used wheel bearing grease on the first rebuild, and a mix of grease and engine oil thickener on the second. #2 runs quieter. I have a quantity of 20w oil for the oil points, and an old Bell & Howell oiler that I use to push aside the little balls in the oiler caps When I fired up the #2 Holmes, I missed oiling one of the intermittent bearings. It squeaked. After the oil got into it, it has never made another sound, other than being a Holmes with a 60 year old intermittent. KEN: I'll check out the Kelmar rollers. Bruce
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John Walsh
Film God
Posts: 2490
From: Connecticut, USA, Earth, Milky Way
Registered: Oct 1999
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posted 08-26-2000 09:24 AM
Speaking of reels, Goldberg made all kinds of reel (not just for projection, either.) I don't know if they still make all the different types of projector reels, but it was kinda cool to look through their catalog.We had those 35mm reels (that Gordon mentioned) with flanges on them for use on a 70mm spindle. They were really nice; they held 3000 ft, so you had plenty of room to put your trailers and stuff on the beginning, and they were made of cast aluminum (not a stamped sheet of aluminum) so they didn't bend so easily. We also had the slip-hub, 7" dia reels Scott was mentioned. They were nice, too. On most Cinemecannicas, the motor starts up fast, so a slip-hub is actually required, especially on a V9. Strangely, on a V8, if you used a small hub reel, it would not take up the film quite fast enough at start. That is, the film would come out of the projector at the same speed as the take-up reel wound it up. So the film would sag under the reel for a while until the diameter got bigger.
I went to Goldberg web site, and it's really not very good:
http://goldbergbrothers.uswestdex.com/
I've been using this link page for general projection stuff; it's pretty good;
http://www.geocities.com/Hollywood/Theater/3622/index.htm
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Bruce McGee
Phenomenal Film Handler
Posts: 1776
From: Asheville, NC USA... Nowhere in Particular.
Registered: Aug 1999
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posted 08-26-2000 07:57 PM
Jeff:My motors are original GE and Emerson motors that are rated continuous with a 40 degree rise. All 3 of them have been torn down and thoroughly cleaned and lubricated. One of the GE's has been rewound locally and runs well. All 3 run at the same general temperature... around 125 degrees F. I took a flywheel off of a treadmill and installed it between the motor and the coupler on one of the Holmes. It now starts a little more slowly, and slowly stops after I kill the power. I'll take it off when I start doing changeovers due to the difference in start-up speeds, and the chance of tripping a breaker when the start winding is engaged a little too long.
I have 15 amp breakers on the 2 lines that the Holmes are plugged into... Just to be extra safe.
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