So my current thinking is to use a single, vertical shaft in the center of a cone shaped bowl. The bowl could be built from steel sheet, welded and then coated with urethane or a spray in bed liner.
This shaft could have one eccentric at the base and one at the top of the cone to create a wobble in the tub. Each eccentric or counterweight could be adjustable - possibly on-the-fly if I can figure out how to accomplish that but on-the-fly adjustment is not necessarily a requirement.
I am also thinking about 3/8"-3/4" of total amplitude with variable speed. If I can adjust the speed and the amplitude, I could create the motion needed for each batch of parts. I like having flexibility - especially when I don't really know what the heck I am doing. I have even come up with a way to move the upper eccentric/weight up or down on the center shaft to alter the rocking action.
It also looks like this equipment supply market is a bit thinly populated (small, full feature equipment under $1500).
Thoughts?
Scott
Consistency is a good thing....unless you're consistently an idiot.