This is topic Image Shaking in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.
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Posted by James R. Hammonds, Jr (Member # 673) on 10-07-2001, 06:38 PM:
I have problems with image shakiness on two different projectors.
One of them shakes in both flat and scope.
Now, this doesnt looke like a gate tension problem, because this is more of a vibrating than a "weaving" movement.
Also, if you hold down on the turret, the shaking stops.The other projector has the same problem, but only with flat movies.
The lens seems to be in place and secrued tightly, so were not sure what the problem is.
Any help is appreciated.
Thanks,
James
Posted by Aaron Sisemore (Member # 145) on 10-07-2001, 06:45 PM:
Are they Simplexes with the TU2000 turret? These are INFAMOUS for vibrating pictures. I have one that to this day I cannot stop the vibration by 'normal'[adjustments, etc.] means (resulting in our having to jam something into the assembly to stop the shake)-Aaron
Posted by Ken Layton (Member # 133) on 10-07-2001, 06:50 PM:
Please indicate the make/model of the projectors in question.
Posted by Brad Miller (Member # 2) on 10-07-2001, 07:08 PM:
Sounds like a loose turret latch or a blower fan. We really need to know the specific model of equipment, including the lamphouse and approximate date of manufacture.
Posted by James R. Hammonds, Jr (Member # 673) on 10-07-2001, 07:27 PM:
I knew I forgot something.These are the Strong Milleniums.
I believe manufactured Sept. 99.
Thats the date on everything else we opened with.
Posted by Adam Martin (Member # 641) on 10-07-2001, 07:41 PM:
Also check to make sure the lens elements aren't unscrewing from each other. Had that happen once or twice.
Posted by Bernard Tonks (Member # 809) on 10-08-2001, 09:13 AM:
I had the same problem many years ago, which I overcome by fine adjustment of the motor on the mounting cradle. But then my equipment is different to yours and a lot older, Westar (Century) & RCA 9031 soundheads.
Posted by Freddie Dobbs (Member # 915) on 10-08-2001, 10:12 AM:
If you look at the turret stop and latch I think you will find that the latch is not holding the turret tight against the stop. Assuming the aperture was cut correctly, you can pull the turret tight against the stop and judge where to adjust it, the aperture must be put correct with the masking while holding the turret tight against the stop, without physically sliding the console.
Posted by John Pytlak (Member # 331) on 10-08-2001, 12:36 PM:
One simple way to separate "projector shake" from film unsteadiness is to focus on the edge of the aperture while projecting "open gate" without film. If the image of the aperture edge is moving, either the entire projector or the lens mount is vibrating. (Or you are having an earthquake 
). Keep the "open gate" time to only a few seconds to avoid overheating the lens, or use a "pinhole" aperture.------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Research Labs, Building 69, Room 7525A
Rochester, New York, 14650-1922 USA
Tel: 716-477-5325 Cell: 716-781-4036 Fax: 716-722-7243
E-Mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion
Posted by Pete Naples (Member # 761) on 10-08-2001, 02:27 PM:
Are these fittes with the Leeson single phase motor?? We haev appalling difficulties with ALL Strong projectors fited with those motors. They hunt, and the resultant 1 Hz harmonic vibration sets the whole machine vibrating so badly that it can be seen on screen. It's bad enough that the machien visibly moves at 1 Hz when running.
The only solution we've found is to remove the pile of junk motor and fit a decent one, three phase with invertor control works great.
Posted by Carl King (Member # 398) on 10-09-2001, 02:36 PM:
The shake could be from almost anything from loose turret mounts/screws to loose lenses. Spend some time and tighten everything you can without affecting your image on screen.You might want to contact Strong for some advice.
Carl King
"Drown in a vat of whiskey? Death where is thy sting?"
W.C. Fields