| 摘要 |
PURPOSE:To make an operator's readjustments of a potentiometer unnecessary, by changing automatically the running speed of a detecting part in accordance with a value set to a computer. CONSTITUTION:An optimum running speed is calculated and is set automatically by a computer 5, and this value is outputted as a digital signal. This output is subjected to D/A conversion by a D/A converter 6 and is floated electrically by an isolator 7 and is inputted to a comparator 4a. The gate of a triac 4e is triggered on a basis of the output of the comparator 4a, and driving of a motor 2 is so controlled that the difference between the output of the isolator 7 and the output of a tachometer generator 2' is zero. Thus, the output of the computer 5 is transmitted to the motor 2, and the running speed of a detecting part 1 is controlled to the optimum running speed set to the computer 5, and the work of the operator is made easy. |
