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Author Topic: Spinning wheel goes bang Phil Ranucci Expert Film Handler Posts: 236 From: Carpinteria,CA, United States Registered: May 2006 posted 06-16-2009 10:37 PM                     Well our recently installed Barco DP2000 lost its Dolby filter wheel today. Have to say not a big pile of glass shards for the money. I get to see it being replaced tomorrow. Anybody else have one break? We are not amused.  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 06-16-2009 10:39 PM                     Was there a bulb explosion? Was the wheel not properly tightened down?  |  IP: Logged David Stambaugh Film God Posts: 4021 From: Eugene, Oregon Registered: Jan 2002 posted 06-16-2009 10:47 PM                        Spinning wheel in brand-new $100,000 state-of-the-art digital projector = Me laughing. I'm sorry, I know it's not funny, but still... Did it break during a show? What does the image look like when this happens?  |  IP: Logged Jon P. Inghram Expert Film Handler Posts: 124 From: Wichita, KS USA Registered: Jan 2007 posted 06-16-2009 11:02 PM                     At least the projector keeps the shards from flying and cutting your head off. Every time I get close to our MasterImage's whirling Disk-of-Doom I expect it to explode and send shards of plastic into my eyes.  |  IP: Logged Sam D. Chavez Film God Posts: 2153 From: Martinez, CA USA Registered: Aug 2003 posted 06-17-2009 01:41 AM                       I have a DP2000 with Dolby color wheel giving a "color spin error" in the log every so often. You push the 3D button on the projector again even though it's already on and the picture returns to normal. So far no one at Barco has a clue what his means.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 06-17-2009 03:23 AM                     quote: Phil Ranucci Anybody else have one break? Yes, I've had one disentegrate but because of a lamp explosion. Glass shard from lamp went right through the heat filter on a CP-2000 and also took the wheel out. Had to replace Reflector, Lamp, Heat filter and Dolby wheel. I think the parts tab was somewhere around 20K for the whole clean up. I hope your's is under warranty since the wheel carries an almost 14K list price!!! This is very definately THE system where theater owners may want to consider carrying equipment insurance. Mark  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 06-17-2009 06:49 AM                     I don't think a lamp explosion on a Barco could get to the Dolby wheel, Brad. In a Barco, the lamp sits 90-degrees to the Dolby wheel. Also, the Barco lamphouse pretty well holds/contains lamp explosions. Steve  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 06-17-2009 08:47 AM                     It would depend on how well the heat filter holds up... how thick it is and so on. The Barco's I've worked on don't have as thick of filter as in a Christie. Glass shards could certainly bounce off that right angle mirror if they make it through the heat filter and then take out the wheel. Then there is the concusive factor of the lamp explosion itself... they say a 2kw is equal to one stick of dynamyte! A 6kw lamp is going to be a much higher powered explosion. That is one factor one can't get away from no matter what... that Dolby wheel is VERY thin! Either of these scenerios is certainly possible and I don't really see much less of risk because of the right angle mirror. Another point is that right angle mirror in there (and on NEC's) is why they don't put out as much light as the competition does which can cause one to go to the next higher wattage lamp and up the operating expenses. Mark  |  IP: Logged Hendarto Ciputra Film Handler Posts: 8 From: Jakarta / Indonesia Registered: Jul 2008 posted 06-17-2009 11:14 AM                     In the DP2000 there's another mirror at the opening after the reflecting mirror this further reduce possibility of breaking the wheel. On the other hand, i encountered a deffective dolby that went bust on first activation. Claimed it under DOA and get replacement within a week  |  IP: Logged Ian Parfrey Phenomenal Film Handler Posts: 1049 From: Imbil Australia 26 deg 27' 42.66" S 152 deg 42' 23.40" E Registered: Feb 2009 posted 06-17-2009 12:57 PM                     Spinning colour wheels??? Sounds like a throwback to the days of multi-coloured front shutter projectors of the 1920's! Why the wheel? Surely a pulsed dichroic lamphouse similar to a telecine would be more efficient/effective..and at $20K, most likely cheaper too? Without seeing one of these units, I have to admit to being a noob, so please excuse my ignorance. Cheers Ian  |  IP: Logged Jack Ondracek Film God Posts: 2348 From: Port Orchard, WA, USA Registered: Oct 2002 posted 06-17-2009 01:07 PM                        quote: they say a 2kw is equal to one stick of dynamyte! Ahhh... Living in an area where several groups of Indian descent sell dynamite for a living (creatively relabeled as fireworks), I'm fairly sure there isn't a lamphouse on the planet that would survive a full stick explosion... much less the surrounding projection room.  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 06-17-2009 01:13 PM                     ...maybe an M-80, or a cherry bomb ..., Now, when a LTi Helios goes, they are a bit more nastier due to the higher compression inside the bulb.  |  IP: Logged Martin McCaffery Film God Posts: 2481 From: Montgomery, AL Registered: Jun 99 posted 06-17-2009 01:34 PM                        quote: Jack Ondracek I'm fairly sure there isn't a lamphouse on the planet that would survive a full stick explosion... much less the surrounding projection room. Only one way to resolve this dispute: It's video time!  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 06-17-2009 01:57 PM                        Where are the Mythbusters when you need them! (lots of flame and loud noise) Louis  |  IP: Logged Justin Gorka Expert Film Handler Posts: 174 From: High Wycombe, England Registered: Apr 2006 posted 06-17-2009 03:55 PM                     Go with Real D, no spinning wheels here!  |  IP: Logged

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