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Topic: Article on small town Digital conversion

Brad Miller
Administrator

Posts: 17775
From: Plano, TX (36.2 miles NW of Rockwall)
Registered: May 99

posted 05-11-2011 11:57 AM

quote: Mark Gulbrandsen
Actually Brad it is NEC that has the other two beat as per the filtering. They filter all incomming air with Hepa filters. Hepa filters do a much beter job than the metal screen filters BARCO uses...

Mark, Barco has the sealed light engine. Much more important.

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Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99

posted 05-11-2011 07:20 PM

Thats what one has to do when one does not have adaquate filtering in the first place. I can actually repair an NEC Light Engine IN THE FIELD... Which is much more important than it being sealed...

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Chris Slycord
Film God

Posts: 2986
From: 청주시, 경북도, South Korea
Registered: Mar 2007

posted 05-11-2011 07:23 PM

It's a bit off-topic but there's no such thing as a HEPA filter. HEPA certifies filtration systems. Just taking a filter from one of those and sticking it in something else doesn't make it "HEPA" and it's even worse that lots of companies sell what they call "HEPA-type filters" which just means that they maybe cloned a filter from a real filtration system and more likely made a piece-of-shit copy.

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Mark Gulbrandsen
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Posts: 16657
From: Music City
Registered: Jun 99

posted 05-11-2011 07:37 PM

HEPA to me means that it is able to remove down to pollen sized particles and thats fine bby me. I don't give a crap who HEPA is or what they do at dinner time. Both Christie and NEC claim their HEPA filters work well and my experience has shown that this has prooven to be true. BARCO uses a single layer fine mesh metal screen in which the size of the holes in the screen determine the size particle that can get past. Any one know how large the holes in the BARCO filter screen are? My experience has shown that the HEPAs on both the Christies and NECs work much better than the metal mesh... and all mt customers with Christie, BARCO and NEC are in a desert type condition so it's pretty brutal as far as dust goes.

People can argue projectors all day long but they fail to see that they are all T.I. approved designs and are all ultimately very similar to each other circuit wise. You will see different types of integrator rods,power supplies and GUI between the user and the T.I.software amongst the three companies but the basic projectors are all T.I. and they all still work more or less the same. Even the implementation of how the modules and PCB's are made has to be approved by T.I. before they can be produced. That is all part of how T.I. has made this product become so reliable...

Mark

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Sam D. Chavez
Film God

Posts: 2153
From: Martinez, CA USA
Registered: Aug 2003

posted 05-11-2011 07:38 PM

I want to hear more about these field repairable light engines.

I have vivid memories of visiting the Christie plant and seeing techs in surgical garb in an air filtered room like something out of Intel.

I don't know anybody with a shop like that.

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Mark Gulbrandsen
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Posts: 16657
From: Music City
Registered: Jun 99

posted 05-11-2011 08:11 PM

Sam... Tim at Strong showed some of us that were interested during training class how it is done. There is also a training class that is board level at NEC in Itasca, IL. next week... perhaps you should go to it, it may also cover this. You can convert an older engine to triple flash or you can also send it to T im and he'll do it on his bench and then put it in a projector and burn it in and converge it before sending it back. NEC uses a very unique pressure type pin that makes contact with the pads on the efib or ffib boards. They do this because it can be extremely expensive in some countries to send in an entire light engine... and will you actually get the old one back or not?? Brazil is tough and I know you know some other countries that are as well. I have pictures of him doing this procedure in training class and watching him do this was optional for those that wanted to. Needless to say this sort of thing is right down my alley so I watched. Replacing the DMD's in the field.... probably not but you would have to ask Tim on that to be sure...

BTW: I remember it being said in Christie class that they are not field repairable. However, Rodney once told me he had done it in the field himself...

Mark

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Chris Slycord
Film God

Posts: 2986
From: 청주시, 경북도, South Korea
Registered: Mar 2007

posted 05-11-2011 10:35 PM

quote: Mark Gulbrandsen
HEPA to me means that it is able to remove down to pollen sized particles and thats fine bby me. I don't give a crap who HEPA is or what they do at dinner time.

Touchy, are we? My comment wasn't necessarily geared toward you and more geared toward the over-use of the "HEPA filter" phrase with respect to a lot of products.

Although I admit I was wrong. The government does, in fact, rate filters as being HEPA but the distinction is that a lot of companies use a one of these filters but skimp on the design so that not all the air actually hits it.

On the other hand, I'd expect the companies you're referring to to have designed them properly...

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Monte L Fullmer
Film God

Posts: 8367
From: Nampa, Idaho, USA
Registered: Nov 2004

posted 05-11-2011 11:39 PM

quote: Mark Gulbrandsen
Any one know how large the holes in the BARCO filter screen are?

... the holes are close in size in thread density to a red shop rag .. and these three filters (two small ones on the light engine side and the big one in front) are super easy to clean - you take them out and take a canister vacuum to them on the input side to clean the screens and return them to their places.

The dust particles themselves looks more finer than flour making these filters stopping decent fine particles.

Luckily, the filters and mesh are made of stainless steel for durability, for if made with aluminum, the mesh would tear rather easily.

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Jake Spell
Master Film Handler

Posts: 294
From: Johns Island SC
Registered: May 2009

posted 05-12-2011 12:44 AM

Im fairly certain that those filters catch much smaller particles than the hole size because as air passes through it it will build up a slight charge and attract the dust to the filter surface. Way cheaper than replacing filters every so often, esp. HEPA rated filters

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Brad Miller
Administrator

Posts: 17775
From: Plano, TX (36.2 miles NW of Rockwall)
Registered: May 99

posted 05-12-2011 02:08 AM

quote: Mark Gulbrandsen
Thats what one has to do when one does not have adaquate filtering in the first place. I can actually repair an NEC Light Engine IN THE FIELD... Which is much more important than it being sealed...

No need to argue this with you, I respectfully disagree as I am sure many others will too.

Be sure to send us a video of you doing this repair in a booth somewhere. I'm sure that I am not the only person here who would like to see it.

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Mark Gulbrandsen
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Posts: 16657
From: Music City
Registered: Jun 99

posted 05-12-2011 04:58 PM

Should the need ever arise that I have to I will be glad to post a video can find the pics of them doing it at Strong I'll also post those. The socket arrangememt DMD to ffib board is somewhat like the socket for a current Intel CPU except there are many many more spring pins...

@ Jake... That is a charasteric of almost all air filters... paper or metal. Just wait till you have to buy one of those!! It's cost will make replacable hepa filters easily embracable Which is most likely why the other manufacturers went that route.

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Carsten Kurz
Film God

Posts: 4340
From: Cologne, NRW, Germany
Registered: Aug 2009

posted 05-12-2011 05:32 PM

Well I'm sure that Barco and Kinoton made an informed decision towards the combination of a washable metal filter with a sealed light engine.
Just like Christie and NEC did for their filters.

We recently had a discussion on another forum about the cost for christie filters. One cinema just paid the equivalent of 1067US$ for 4 sets.
Yes, thats 265US$ per set.

- Carsten

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Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99

posted 05-12-2011 07:27 PM

Geez... Time for them to find a new supplier, they got shafted on that! They don't cost any where near that much over here and if you buy in quantity they become as inexpensive as a decent home furnace filter.

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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12814
From: Annapolis, MD
Registered: Dec 1999

posted 05-12-2011 10:48 PM

Barco has had the metal mesh filter on the Series-0 machines, went to the HEPA filters on Series-1s (.98") and then back to the metal mesh. I tend to agree that the HEPA filters seem to stop more dirt and I do like that NEC put filters on the lamp intakes.

Then again, the custom filters for the NEC and Christie projectors are relatively expensive and do add to the overall operating costs. Barco's are washable (recommended once for every 30-days of OPERATING time).

And back to the subject (as presented in the title).

We just converted the ELKINS CINEMA in Elkins, WV to all digital this week. Barco projectors, Dolby servers.

Next week, Upshur Cinema...Buckhannon, WV.

-Steve

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Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99

posted 05-13-2011 11:30 AM

Steve... Be sure to try the moonshine while you're in that area!!

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