| 摘要 |
PROBLEM TO BE SOLVED: To perform forward/reverse control of a wheel drive motor, rotational speed control, etc., accurately depending on the operation of an operating means through simple circuitry. SOLUTION: Variable resistors 11, 12 responsive to the operation of a joy stick 10 are connected directly with a reference voltage supply section and provided with auxiliary terminals 11f, 12f for outputting a predetermined intermediate voltage within the variable range of sliding terminal voltage. A CPU 30 on a control board 2 determines the difference between the sliding terminal voltage and the auxiliary terminal voltage and performs forward/reverse control of wheel drive motors 3, 4 and rotational speed control there based on the difference thus determined. |
