Film-Tech Forum ARCHIVE: Lamp Cooling.

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Topic: Lamp Cooling.

William Phillips
Expert Film Handler

Posts: 117
From: Cardigan, Wales, UK
Registered: Feb 2002

posted 06-18-2002 03:24 PM

In August the cinema that i work in is going to be having major building work carried out on it. We are having a second hall built and a total refurb of the exsisting.
During the building of the new we will still be running in the exsisting. My concern is that there is going to be a load of dust and dirt flying about and i`m worried about the lamp. The machine is a VIC 5 with a CX21H lamphouse running 1.6KHSC. The projector is split from its stamd and sits on the floor. From floor to optical centre is 18 inches. The lamphouse fan therefore sucks all the dirt from the floor and over the lamp ( the box is kept very clean as a result ), with the building work there is going to be a load more. I am getting a filter unit put onto the fans that draw air into the box as a start, but was woundering if anyone out there has got or put an air filter on the lamphouse, if so does it help.
Any advice would be good.

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William Phillips
Expert Film Handler

Posts: 117
From: Cardigan, Wales, UK
Registered: Feb 2002

posted 06-18-2002 03:27 PM

Forgot to add that I do run PTR`s and an electrostatic cleaner on the film at all times. Also have very recantly discovered the joys of FILM-GUARD

applied by hand on a tower.

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000

posted 06-18-2002 03:51 PM

In addition to being ready to clean the film more, be sure the construction crews isolate the construction area with dust-proof plastic (polyethylene) sheeting taped to eliminate dirty air flow from the construction area. Try to keep extra personnel traffic outside of your projection area. Cover the prints when they are not in use. Use wet mopping or a vacuum cleaner exhausted to the outside of the area to clean up any settled dust on a frequent basis.

NEVER run a media cleaner (Christie or Kelmar) DRY -- construction debris is very abrasive, and will quickly turn the media to sandpaper. I've seen prints scratched through their entire length by being "cleaned" through a media cleaner loaded with abrasive dirt.

Is the construction being done "off hours"? If not, how will you keep noise and distractions from interfering with your shows?

------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Research Labs, Building 69, Room 7525A
Rochester, New York, 14650-1922 USA
Tel: +1 585 477 5325 Cell: +1 585 781 4036 Fax: +1 585 722 7243
e-mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion

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Ben Wales
Jedi Master Film Handler

Posts: 602
From: Southampton. England
Registered: Jul 99

posted 06-18-2002 04:00 PM

The best advice is to with a big plastic sheet cover up the projector/sound racks/platter etc while the building work is going on and when you are screening try to have a good clean up, I have seen some projection rooms look like building sites, so I would think you should be ok, the main concern would be the screen in the cinema.

If workman are working any where near projection equipment/screen "unsupervised" you are asking for trouble and things can get damaged and in some cases stolen, so stay alert when building work is going on in the cinema!.

As for filters for the Xenon, insure that they do not clog up as there is a likely hood you will get Air Flow problems and the lamp house will shut down due to poor air flow.

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William Phillips
Expert Film Handler

Posts: 117
From: Cardigan, Wales, UK
Registered: Feb 2002

posted 06-18-2002 04:49 PM

The work is going to be done out of hours. During the week we normaly open at 5.30pm until 11pm with 2 shows during normal school weeks and then normaly 4 or 5 on weekends unless its the school holidays then it just goes mad. So the noise wount be an issue until holidays, then who knows what happens.

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Kyle Watkins
Expert Film Handler

Posts: 185
From: Stuart, FL, USA
Registered: Sep 2001

posted 06-18-2002 05:00 PM

If you are not going to be ther cover everthing up and lock everthing up. we had so many tools stolen, along with splicer and even 3 slide projectors. we also had a speakers stolen. so before you open doulbe check to see if anyhting is missing kyle

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Richard Fowler
Film God

Posts: 2392
From: Ft. Lauderdale, FL, USA
Registered: Jun 2001

posted 06-18-2002 05:15 PM

The CX21H has a muffin type intake fan in the rear and a filter would not be recommended at 1600 watt.....just keep the area as clean as possible.
Richard Fowler
TVP-Theatre & video Products Inc. www.tvpmiami.com

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Jan Hackett
Expert Film Handler

Posts: 148
From: Albuquerque, NM, USA
Registered: Apr 2002

posted 06-19-2002 12:19 AM

plastic plastic and double plastic with duct tape to hold it in place. Contruction dust can last a year. Use air cleaners and duct tape the plastic everywhere. A few extra minutes preparing will make a HUGE difference between a great presentation and a good one. I go for the great presentation.

------------------
Jan Hackett
Theater Operations Manager
Extreme Screen Dynatheater
NM Museum of Natural History Foundation

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William Phillips
Expert Film Handler

Posts: 117
From: Cardigan, Wales, UK
Registered: Feb 2002

posted 06-19-2002 12:13 PM

Richard
I should of also said that I had thought of changing the original fan with a centrifugal fan that can put out 311cfm(not sure how much reduction there would be with the filter on). where as the original fan I think is rated at somewhere at 280cfm.I would also need to make an adaptor plate for the fan but thats not a problem as I have access to a mechanical workshop. In one of the UK`s electronic supply books the original fan is called a Tarzan. After about 30 mins you know why it got its name. I have also got an external fan on the stack that can pull out 350-400 cfm (or somewhere around that figure).
i put this on about a year ago and the lamphouse is a lot cooler than it used to be.

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Manny Knowles
"What are these things and WHY are they BLUE???"

Posts: 4247
From: Bloomington, IN, USA
Registered: Feb 2002

posted 06-21-2002 12:33 AM

So you're using Film-Guard and PTR's? I thought that was a no-no!?

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William Phillips
Expert Film Handler

Posts: 117
From: Cardigan, Wales, UK
Registered: Feb 2002

posted 06-21-2002 12:20 PM

So far I`ve had no problems with it. I dont have a Dry Media cleaner to apply it, just some selvit cloth that i spray a tiny amount on and then apply to the edges of the film. If the film comes in looking a bit dusty in the cans then its gets it straight away. If not I will wait until the rehersal run and see how it runs. If nasty and dirty in the gate then I apply it once on the spools. Floting hub spools are easy for this. The PTR`s havent complained. I have 3 sets, two rollers per show for one show only and then its bath time for the little chappies. Nice clean rollers=nice clean prints with the help of FILM GUARD.

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Darren Briggs
Master Film Handler

Posts: 371
From: York, UK
Registered: Dec 2001

posted 06-23-2002 10:52 AM

Film Guard applied to the edge of the film works a treat on reducing the amount of crap which is left in the gate after the film has been run through. Also PTR cleaners used in conjunction with this work well. Used on every show from new, a print can leave 'as new' no problems. The rollers remain sticky after every wash and i have no problems using them.
Every IMAX system ive seen use PTR's and there prints look great.
Darren

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