Here is a brief slideshow of how I built the Post-Imperial Shaker. The frame of the machine is built simply of 2x2 angle-iron, with 3/4” dia. supports for the axles. I used shaft collars welded to the supports to house the bushings and bearings where the axles rotate. The key mechanism here is the “crank slider”, a sort of piston which allows a rod connected to a crank (on the flywheel) to pivot and slide, creating an elliptical path where the shakers are.