Power Wheelchair Drive Controls, Part 1: Proportional vs. Non-Proportional Early on in my professional career, it dawned on me how similar learning to drive both an automatic and a manual transmission car was with the process of selecting the proper power mobility device, including the drive controls. In this series of posts, we are going to explore various technologies available in power wheelchair drive controls. In addition, we will take a look at examples of drive controls and review potential applications of each. 6/28/2019 Keep Reading