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Author Topic: "vibrating" picture with simplex 35's Tom Wienholt Master Film Handler Posts: 371 From: Towson, MD, USA Registered: Dec 2002 posted 05-08-2010 02:54 PM                     Simplex 35's with turrets. I tightened all lenses and the turrets themselves. Picture is steady when movies are first started. However, about an hour after starting, the picture seems to vibrate on screen. The vibration is very noticeable in the end credits. This happens on both of my simplex 35 projectors. Also, oil levels are at proper levels. I'm stumped. Any suggestions?  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 05-08-2010 03:13 PM                     are the elements in the lenses tightened down, for turret operation units can actually loosen the rear element assembly. Also, where you saw it in the credits, the bulb could be focused too close to the shutter .. back off the bulb some on this one. Yet, I did a service call at one 5plex cinema with XL's that also complained on vibrating images in one house and this was in the intermittent assembly. The assembly was loose in the framing cam-the two assembly clampdown tabs were loose (also, the framing cam pinch tabs were also shot as well..). How about the later guide roller in the trap and gate assembly - is it aligned correctly in the trap? ..some areas to ask on .. -Good luck - Monte  |  IP: Logged Tom Wienholt Master Film Handler Posts: 371 From: Towson, MD, USA Registered: Dec 2002 posted 05-08-2010 03:34 PM                     The lateral guide rollers look good. I will try backing off the bulb a bit. But, it doesn't make sense that the picture would be steady for about an hour and then start to vibrate. If there was a problem with loose lenses or the intermittent wouldn't the vibration always be there?  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 05-08-2010 03:43 PM                     Oh do agree with the logic, but sometimes situations will appear that will fall out of the logical situations - like if the unit has a mind of its own.  |  IP: Logged Randy Stankey Film God Posts: 6539 From: Erie, Pennsylvania Registered: Jun 99 posted 05-08-2010 03:54 PM                     Could it be "rubber screen?" Like Monte said, if the lamp is focused incorrectly it will cause the film to heat up in the gate. It will flex in and out of the focal plane of the lens causing a weird effect that makes it seem like the screen is made out of a giant sheet of bouncing rubber. With projectors, lamps and lenses made today, this phenomenon should not be common but if things are far enough out of whack it can still happen.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 05-08-2010 04:33 PM                     The word Simplex Turret says it all. The problem is definitely in the turrets!!!  |  IP: Logged Tom Wienholt Master Film Handler Posts: 371 From: Towson, MD, USA Registered: Dec 2002 posted 05-08-2010 05:18 PM                     Mark, I have tightened the lenses and all parts associated with the turrets. Also, if it is te turrets causing it, why would the first hour or so of the movies be completely steady? Makes no sense to me.  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 05-08-2010 05:28 PM                     What model turret? I'll bet it is a TU2000.  |  IP: Logged Tom Wienholt Master Film Handler Posts: 371 From: Towson, MD, USA Registered: Dec 2002 posted 05-08-2010 06:34 PM                     Brad you are correct. So it seems that these turrets are known for this type of problem. What's the best solution?  |  IP: Logged Randy Stankey Film God Posts: 6539 From: Erie, Pennsylvania Registered: Jun 99 posted 05-08-2010 06:43 PM                     If it is a TU-2000 then I agree. Those things are a bitch to get right. The best thing to do is to take them out and burn them.  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 05-08-2010 06:55 PM                     Use the manual latch at the bottom to hold the turret snugly in place and give up on the auto part. Watch the "ridiculously advanced booth training seminar" video on how to set the oil levels in your Simplexes.  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 05-08-2010 07:02 PM                        Let's not forget the "rattling element" problem many otherwise good lenses have. Remove lens, rap against your palm and look for a rattle. Louis  |  IP: Logged Randy Bowden Expert Film Handler Posts: 146 From: Portland, OR, USA Registered: Aug 2000 posted 05-09-2010 12:48 AM                     Do you see a steady stream of oil going into the intermittent? Chances are the oil pump intake screen has never been cleaned. If you are running simplex 1050's then it's definitely long overdue for it. You should see oil streaming down the oil collector tube feeding the intermittent flywheel. If it's not and all you see is a drip then your intermittent is likely giving you problems as it's heating up.  |  IP: Logged John Walsh Film God Posts: 2490 From: Connecticut, USA, Earth, Milky Way Registered: Oct 1999 posted 05-09-2010 07:13 AM                     Could be a heat related problem; after an hour, the lamp has heated up the turret or lens holder. Try just putting pressure on different assemblies with your hand and look on screen if anything changes; push the turret firmly into the closed position, put side pressure on the lenses, the spinning part of the turret, the entire projector itself. I have seen people place a rod under the projector to to reduce it's vibration.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 05-09-2010 06:28 PM                     I have also seen a shutter that was out of balance in an X-L. It caused a nasty vibration. John's suggestion made me think of this because as it heats up the shutter could be warping slightly. Mark  |  IP: Logged

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