Proxxon micromot variable speed transformer proxxon 28704 p the proxxon micromot ng 5 e mains adaptor has variable speed control with feedback effect for optimum tool speed and high torque at low speeds p p this quality adaptor is not only avaialble at a low cost but also incorporates the following features three polarised sockets for micromot machines a pair of sockets for standard banana plugs 4mm diameter master switch for turning off the transformer without needing to unplug re