[Tig] spirit questions (maint)

[Nichols Craig]

Cleaning lens 2 (the one behind filter wheel) is essential and can
severely limit headroom if dirty.  This can cause machine not to FPN,
and can also contribute to vertical lines appearing in picture.

The other part that should be inspected is the diffusion chamber.  I had
one client blowing massive a massive quantity of high pressure air into
several different diffusion chambers and thought the "white dust" they
saw coming out was dirt. They needed several new skid plates. Proper
cleaning is outlined in manual section 6.4.3.

If you hold a flashlight up to diffusion chamber you can see if coating
is even. If there is dirty air from compressor, or improper cleaning,
this will shorten life dramatically. This is also a major cause of FPN
failure and vertical lines in picture (if slit is not clean).

Disclaimer: I make nothing from proper dispensing or delivery of air or
cleaning supplies. (Actually we make less if you guys keep things clean)
";^)

HTH

Craig Nichols
Sr. Digital Film Support Engineer
Thomson Grass Valley



-----Original Message-----
From: tig-bounces at tig.colorist.org [mailto:tig-bounces at tig.colorist.org]
On Behalf Of Rob Lingelbach
Sent: Friday, March 28, 2008 8:33 AM
To: Nichols Craig
Cc: Telecine Internet Group
Subject: Re: [Tig] spirit questions (maint)

1824 subscribers as of March 2008
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many thanks Craig for the info.   As a matter of fact I just finished  
the job, though didn't clean that lens behind the filter wheel as I  
don't have gloves handy - I also didn't clean the filterwheel-filters  
because without gloves didn't think I could get them out without  
touching their surfaces.  Inspecting that condenser lens from the  
front of the machine with the gate removed, I see your point about it  
being an important one to clean.

Along with checking the air filters, hoovering the blowers and every  
other part of the machine I could reach, it took about 90 minutes.   
Doing the filterwheel and the condenser lens I skipped would probably  
add an hour or so I guess.

Rob


--
Rob Lingelbach
rob at colorist.org  http://www.colorist.org/robhome.html




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