Construction of an Inexpensive Three‐Dimensional Motion Platform Shaker

Abstract There are many applications in biology and aquaculture for a shaker, including the suspension of small batches of eggs or algal cultures. Three-dimensional motion platform shakers provide uniformly mixed fluids with little or no foaming, but they are expensive. If only a one-speed device for suspending fluids is needed, one of these shakers can be constructed simply, in less than an hour if all the materials are at hand, for about US$75. Construction centers around a subfractional gear motor, a “lazy susan” turntable swivel with ball-bearings, and a slightly eccentric angled hole that is drilled in a block of wood attached to the lazy susan.