Abstract: An automated machine for transferring solution from a source microwell plate to a destination microwell plate. A plurality of pins is used for transferring the solution. The pins are attached to pin assemblies. The pin assemblies are attached to the circumference of a circular dial that is rotatably connected to the automated machine. The circular dial rotates the pins form a solution removal position to a solution transfer position and then to a pin cleaning position. Solution is removed from individual wells at the solution removal position and the solution is transferred to individual wells at the solution transfer position. The pins are cleaned at the pin cleaning position. A computer is programmed to control the automated machine and the transfer of solution. In a preferred embodiment, the computer is programmed to: 1) execute a saved transfer list, 2) accept a customized input list from an operator, 3) execute the customized input list, and 4) save the customized input list for later execution.