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Author Topic: Design Review - MiT XLC Console Bevan Wright Expert Film Handler Posts: 176 From: Fountain Valley, CA, USA Registered: Sep 2003 posted 10-21-2003 11:58 PM                        Jason - Analog amp/volt meter - yes. Three phase voltage presence and P.S. fan 'on' are part of the interlock. Power supply accessibility obviously key - I'll post the assembly drawing for the power supply shortly. Hand douser will be continuous duty rated.  |  IP: Logged Aaron Sisemore Flaming Ribs beat Reeses Peanut Butter Cups any day! Posts: 3061 From: Rockwall TX USA Registered: Sep 1999 posted 10-22-2003 12:06 AM                     So far this new product looks promising!!! The resettable 'trip meter' for the lamp hours is a genuis move! It is about time someone did that! Some of the other mentioned ideas I will second or add to: I like the idea of the sliding platform for the power supply, and having a way to 'quick-disconnect' the supply for emergency change-outs. If you do go with squirrel-cage blowers, PLEASE let them be ball-bearing types! Also allow for the blowers to be in the standalone (non-console) rectifier as well. Overrate the power semiconductors in the power supply as much as economically possible, and place them on ROBUST, EFFICIENT heat sinks with forced-air cooling (see my comments on the fans above). Place the heat sink in a manner where if the power semis have to be replaced, it can be done with a minimum of muscle and cursing -Aaron  |  IP: Logged Michael Schaffer "Where is the Boardwalk Hotel?" Posts: 4143 From: Boston, MA Registered: Apr 2002 posted 10-22-2003 01:56 AM                        quote: Concealed internal wiring, routing via ducts and channels to minimize cable exposure – cleaner look, just because we could. What if the worst happens and some of the cables have to be replaced? Sliding out the whole power supply might be very difficult. They tend to be on the heavy side. But maybe a diode board that swings out? Wouldn`t positioning the lamp further back in the lamphouse plus a deeper reflector increase the potential light output? quote: Could a laser alignment source be precisely and permanently mounted BEHIND the reflector, pointing toward the lens and screen, for a really convenient check of alignment anytime the lamp is removed? That is a great idea. It wouldn`t really have to be permanent though if there is a holder which accepts the laser source or mabye different adapters (like for mounting the Align-O-Tron or other devices).  |  IP: Logged Bevan Wright Expert Film Handler Posts: 176 From: Fountain Valley, CA, USA Registered: Sep 2003 posted 10-22-2003 08:32 AM                        Gordon - the lamphouse doors have heat shields on them, we will add a few louvers to get air from the rear plenum to move between the door and the sheild to keep the sides cool. Front AC recepticle is being moved. HTP will be the standard offering but the rear support adaptor can be changed easily for HS type. Michael - The cabling is still accessible it is just routed up the side channels and down the center support/duct, not fully enclosed. The control board on the power supply is hinged to provide complete access to the serviceable items in the supply. The reflector f# is matched to modern lenses, we will have no problem competing on light output.  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 10-22-2003 12:26 PM                     quote: Front AC recepticle is being moved. I rather liked having an operator side convenience outlet. It gives me a convenient place to plug in my laptop and scope. Can you keep it and just add a second one on the non-operator side?  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 10-22-2003 02:29 PM                     Brad I always plug the scope/laptop into the audio rack wireing less chance of a nasty spike I have had to replace very few of the IREM ignitors but they are noisey I like the idea of an SCR rectifier SANREX has built there ones with a 3 phase SCR bridge for years with very few failures and they give you lots of options on variable output control even an easy way to do standybye mode On the sizer jack I have sound that they tended to make the console a little less rigid tending for more vibration to show up on the screen even when clamped down Alos a good idea is to allow correct working distance on the front so many of the european projectors could be fitted on as with the soundhead at the back can be difficult on most north american consoles  |  IP: Logged Michael Schaffer "Where is the Boardwalk Hotel?" Posts: 4143 From: Boston, MA Registered: Apr 2002 posted 10-22-2003 02:56 PM                        All that sounds very promising. What about the laser alignment tool idea?  |  IP: Logged Bevan Wright Expert Film Handler Posts: 176 From: Fountain Valley, CA, USA Registered: Sep 2003 posted 10-22-2003 04:02 PM                        Brad/Gordon- How about we move the operator side outlet down and closer to center on the console, next to the row of knock-outs? Michael - We are looking into a simple diode laser fixture.  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 10-22-2003 09:26 PM                     Sounds good to me  |  IP: Logged Bevan Wright Expert Film Handler Posts: 176 From: Fountain Valley, CA, USA Registered: Sep 2003 posted 01-01-2004 08:29 PM                        Update MiT would like to thank all the participants who provided some great ideas and suggestions to the XLC console development. Look for units in the field in the next couple of months ... and make sure to visit our booth at ShoWest. • Steel uni-body construction, textured powder coat (blue-frame/grey-doors) finish - [the two-piece concept proved a bit too pricey to be practical. Decision was made to go with a more conventional design, as the console is smaller it will be easier to maneuver, and the power supply can easily be removed if desired. We will still offer the lamphouse-only as a separate option.] • Narrow, 21in [533.4mm] width footprint – [For going in next to digital systems or fitting better into cramped booth spaces.] • Lamp is replaceable from either side of the console, with no tools required – [Integral clamping levers.] • All doors are reversible, allowing them to open front-to-back or back-to-front • Dual hour meters, one for cumulative system hours and one re-settable meter for lamp hours – [Lamp hour card still present in inside door pocket for tracking history.] • Air intake from the rear of the console permits use of an air filter (if desired) and ducted intake lowers console noise level • High-efficiency linear power supply using all 100A, positive SCRs on large aluminum heatsink banks and ripple reducing choke/filters on the DC output • Hinged power supply access doors provides easy access to all internal components • Solid-state interlock circuit • Robust '5-speed' power tap switch design • 6RU of rack space from the operator side or rear of the console • Up to 21 breakers, (14 optional, UL 489 branch-rated breakers with master contactor switch) • Concealed internal wiring, routing via ducts and channels to minimize cable exposure • 14in [355.6mm] nickel reflector for all wattages, multi-layer dichroic coatings with optional secondary IR/UV filter • Motorized lamp focus with defeat switch standard • 13 degree downward tilt • IREM™ A/C igniter with auto-strike circuit • Anode cooling ducts for all wattages • LED status indicators for independent monitoring of interlock points, system ready and three phase input phases • Dedicated 115VAC output winding from the power supply transformer – [No external transformer required for export usage.] • Status outputs for future remote monitoring of the system (interlock, power, wattage, hours, etc) • Four configurations, 2-3kW and 4-7kW for 230V or 415V, 50/60Hz • Two 10A convenience outlets • Separate ducting paths for signal, control and power wiring • Internal work light • Designed for HTP lamps (HS with optional rear adaptor) • ‘Continuous-rated’ douser with ceramic shield, configurable for left or right-side operation • Mounting provisions for 4" locking casters (optional) • Mounting provisions for secondary IR/UV filter(optional) Now on to the platter ....  |  IP: Logged Andrew McCrea Jedi Master Film Handler Posts: 645 From: Winnipeg, Manitoba, Canada Registered: Nov 2000 posted 01-01-2004 09:03 PM                        Hopefully this isn't too late, and I don't know much about the specific technical details, but what about incorporating the 1/2 power xenon lamp during changeovers, intermissions, etc. This was that feature that was very advanced for its time in the XEBEX lamphouses. I just thought this might be a good idea because it allows projectionists doing changeovers to save their Xenons.  |  IP: Logged Bevan Wright Expert Film Handler Posts: 176 From: Fountain Valley, CA, USA Registered: Sep 2003 posted 01-01-2004 09:31 PM                        Andrew, The SCRs will allow us to do just that, although the first incarnation will just be on/off - replacing the typical three phase contactor with a solid-state control.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 01-01-2004 10:06 PM                     Bevan: Going with SCRs instead of conventional diodes, eh? Looks like you all took a lot of suggestions to heart. Steve  |  IP: Logged Michael Schaffer "Where is the Boardwalk Hotel?" Posts: 4143 From: Boston, MA Registered: Apr 2002 posted 01-28-2004 04:01 AM                        I forgot to ask when this topic was still hot, what are the advantages/disadvantages of SCRs vs good old diodes?  |  IP: Logged Bevan Wright Expert Film Handler Posts: 176 From: Fountain Valley, CA, USA Registered: Sep 2003 posted 01-28-2004 11:14 AM                        The SCRs allow us two things... 1) to get rid of the three phase contactor and a bunch of high current connections. The SCRs in the initial version will be simply ON or OFF depending on the interlock and the on/off switch or automation. 2) a future phase controlled version of the control board will allow us continuous output current control and a stand-by mode - like a Sanrex.  |  IP: Logged

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