I wired up the motor controller to the vibratory deburrer today. Since I had already bench tested the motor and controller, I had no real concerns other than making sure I was using the right terminals on the controller. I put a tub of ceramic media with some aluminum parts into the unit, and gave it a shot. The media swirled around the tub much like it had in the suspended version, which was something I was hoping to eliminate. After realigning the weights to 90 degrees apart, I found that the swirling was eliminated if I ran the motor at about 60% of full speed. I covered the tub and left it run – thankfully the noise is a little less than the suspended version (but just a little). About 45 minutes later, I heard what sounded like a muffled crash, and ran downstairs to see what had happened. The bucket frame was leaning way over, and after powering off the motor controller, I had a look at the damage.
One of the 4 springs that support the tub frame had snapped from the vibration. As the frame keeled over to one side, the hose that coupled the motor to the weight shaft was twisted and sheared off.
At this point, spending the money for a proper industrial unit is looking more and more attractive.