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Topic: CFS Console Light Output Problems-PLEASE HELP!

Randy Stankey
Film God

Posts: 6539
From: Erie, Pennsylvania
Registered: Jun 99

posted 08-23-2000 05:56 AM

You don't have to have the door open to do the reflector alignment. You can loosen the bolts, close the door and strike the lamp. To move the reflector, grab onto the bottom of the "rack" mechanism and slide it around. Wear your xenon lamp changing gloves to protect yourself from touching any wires, etc. When you get it right, shut down and let it cool for a while. Then you can open the door and tighten the bolts again.

I've had to do this about a dozen times 'cuz we had to change out all our reflector bowls. The reflectors and mirrors all needed to be replaced in some of ours. I had to figure it out by myself (ourselves)
It's a real PAIN getting the dichroic mirror out of those damn things. You might have to take the whole console apart to do it, depending on what 'flavor' of mirror it is.

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John Pytlak
Film God

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

posted 08-23-2000 05:59 AM

Brad said: "And now for the "duh" part...don't look at the light!"

The light output of a xenon lamp has significant amounts of ultraviolet energy. Looking directly at the arc for even a brief instant can cause permanent retinal damage to the eyes. Direct exposure to the strong ultraviolet can also cause skin damage, similar to severe sunburn.

------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Eastman Kodak Company
Research Labs, Building 69, Room 7419
Rochester, New York, 14650-1922 USA
Tel: 716-477-5325 Fax: 716-722-7243
E-Mail: john.pytlak@kodak.com

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Tim Reed
Better Projection Pays

Posts: 5246
From: Northampton, PA
Registered: Sep 1999

posted 08-23-2000 07:56 AM

quote:
Step #1 sounds both dangerous and stupid to me, maybe its just the way I am, even though Tim seems to have done the same...

You mean you have to be sane for this job?!?!!

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Better Projection Pays!

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Greg Mueller
Phenomenal Film Handler

Posts: 1687
From: Port Gamble, WA
Registered: Jun 99

posted 08-23-2000 08:24 AM

If your need to do a lot of alignments you can get a collimating tool out of Sky & Telescope magazine for $100 or less. A quick trip to a machine shop with get you an adapter that will adapt it's 1 1/4" size to your lens size. Collimating is done regularly by amateur astronomers to make sure their optics are lined up, especially on the Newtonian design, which is basically what you're talking about. It won't help you with the spherical or parabolic reflector but it will get you diagonal and bulb lined up.

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Greg Mueller
Amateur Astronomer, Machinist, Filmnut

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John Eickhof
Jedi Master Film Handler

Posts: 588
From: Wendell, ID USA
Registered: Jan 2000

posted 08-26-2000 09:17 PM

I have installed several hundred CFS SX & L
consoles through the years, I have had no problem achieving nominal light output on about 90% of them. The wakest area is the 45'
mirror assy, if it gets mis-aligned in shipping or by bulb explosion your light output will suffer dramatically. The layman can check it's relation to the projector head simply with a ruler and protractor. It MUST
be 45' in relation to the FILM, the reflector is fully adjustable by loosening aformentioned bolts and sliding around.
The main thing to remember, is to move the reflector slightly then check light, I also recommend wearing welding mask or goggles so you can view the light as you are doing this as well as put SPF25+ sunscreen on your hands and face and any other exposed skin! (I usually wear gloves and long sleeves) Have fun!

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