Some useful stuff from recent researches:
http://www.cnczone.com/forums/showthread.php?t=9814 (Vibratory polishers and aluminum) – thread on media and strategies
http://www.cnczone.com/forums/showthread.php?t=15867 (Frequency vs amplitude of the vibration for a polisher) – thread on amplitude
http://www.kramerindustriesonline.co...ing-guides.htm - helpful site
http://www.rhodesmktg.com/products/bowls/benchtop.htm - bowl dimensions, other info
http://www.kramerindustriesonline.co...-finishers.htm - very good, not commonly found information.
"The most common finishing equipment design has a single weight mounted on a motor that is fastened under the bowl. The other drive available has a two-weight system where the second weight is on the top of the motor in the cone center hub.
The single-weight system produces a nice rolling action from the outer edge to the center, but very little spiral action. The two-weight finishing equipment system, which is usually more expensive, produces both the rolling action and the spiral movement around the bowl, which is the same action achieved in the large machines. The spiral action keeps the parts spread out around the bowl."
More info to follow as it is discovered.....