Originally Posted by dingnecros
This thing looks great and seems like I can handle the construction of this mount.
Howerever I have a problem. I live in an apartment complex. The guy who lives above me probably has safety boots on when he walks around the house as it causes anything mounted on my roof to kind of shake. Is there a way to remedy that.
I have an infocus X1 PJ
Here is a simple isolation design off the top of my head. The best I could draw in MS Paint in the last 5 minutes
The top plate could just rest on the isolation material. Experiment with foam, rubber or insulation material. The M4 threaded rod or fasteners don't *have* to go through the isolation material- they could be outside the perimeter.
You could also replace the isolation material with springs piloted over the M4 rod or fasteners between the top and bottom plate. These springs would be in compression. You would need to experiment to find the right size/stiffness of spring, though I'd think you'd need something with viscous dampening similar to a car shock absorber to dampen induced vibration.
Another spring variation could be substituting springs for the rods/fasteners connecting the bottom plate to the ceiling in the attached diagram, i.e. springs or rod-like vibration isolators only, no rigid connection from the bottom plate to the ceiling. The springs would be in tension.
Another option would be to use the basic pipe flange design, and put isolation material between the ceiling and ceiling end pipe flange, and between the single projector plate of the original design and the projector end pipe flange. You'd need to use longer flange bolts with rubber grommets, of course.
M4 threaded rod in several foot lengths can be found at:
Metro Bolt and Fastener Corporation
Redford, MI 48240