Originally Posted by kw33mn
I'm trying to come up with a solution to eliminate the vibration. Might anyone have other ideas?
As the previous poster commented you want to isolate the mounting plate from the ceiling. Outside of the visual nuisance of a vibrating picture, over time there may be internal damage to the projector from the vibrations. I know Peerless sells their Vibration Absorber Ceiling Plate - ACC840 model. I haven't used it so I don't know how effective it is. The principle seems to be to use rubber pads to isolate the plate from the ceiling. You could try a variation of this by installing your own foam or soft rubber washers found at a hardware or home supply store. The object is to isolate the ceiling plate from the lag bolts or screws you installed into the ceiling joists so the washers would be placed between the screw and plate and not between the plate and ceiling. Because foam washers are soft you will need to sandwich them with metal washers on both sides to give them rigidity. Plus when you put everything back together don't tighten the plate snug to the ceiling but leave a gap to allow the washers to flex. I hope my description means sense.
If this inexpensive solution does not work you could purchase a wall mount assuming the wall is rigid enough and is not tied into the ceiling joist giving you the vibration problem.
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