SOLUTION: Being aware of the calibration issues associated with rotating robotic systems, we developed a four-axis system for positioning. To eliminate the sprung weight of similar devices, we designed a cable system to move the arm in four axes. This would allow the arm to transverse across a main spline to a duplicate of the matrix of reagent containers mounted on the opposite side of the spline. To replicate the down draft hood, we designed a platen to which we mounted the reagent carriers. Drawing the fumes down through holes in the platens and then through a activated carbon filter, we emulated the down draft hood in reverse. A second version of this system designed later halved the available throughput for smaller labs. Developed in 1990, over 500 of these systems are still in service.

TASK: The client had developed a prototype robotic system based on a stationary base which rotated and extended a slide holder to reach a matrix of reagent containers mounted to the lab bench. Based on available components from Fisher Scientific, the original system was untenable in a commercial environment. We were tasked with bringing this device to production. Because of the volatile reagents used, a conventional down draft hood was employed to safely remove them. The system also had to be able to be doubled in capacity with little aggravation.