A host computer can prevent a peripheral device connected to the host computer from unexpectedly shifting into a non-connection state through control of the host computer. The motion controller controls insert conveyor assembly speed, envelope conveyor assembly speed, and the rotational position at which the actuator should be activated, based on the encoder signal. The arm is journaled so that it is pivotable around a second pivot point. After one or more periods of use of the appliance, the appliance is modified until the mandibles achieve line occlusion.