A MATERIALS HANDLING VEHICLE WITH A MODULE CAPABLE OF CHANGING A STEERABLE WHEEL TO CONTROL HANDLE POSITION RATIO

摘要

A materials handling vehicle (10) is provided comprising: a frame (20) comprising an operator's compartment (30); wheels supported on the frame, at least one of the wheels being a steerable wheel (74); a steer-by-wire system (80) associated with the steerable wheel to effect angular movement of the steerable wheel about a first axis; and a control apparatus. The control apparatus is coupled to the control handle (90) to receive the steer control signal, coupled to the selection switch (98) to receive the one select signal, and coupled to the steer motor to generate a first drive signal to the steer motor (120) to effect angular movement of the steerable wheel about the first axis. The control apparatus converts the steer control signal to a corresponding desired angular position for the steerable wheel using one of first and second steerable-wheel-to-control-handle-position ratios, wherein the one ratio is selected based on the one select signal.