| 摘要 |
PROBLEM TO BE SOLVED: To prevent the temp. ripple being a difference between the temp. of a fixing material and the preliminarily stipulated target temp., and to attain the stable temp. rising to the target temp. while maintaining the same, by means of at least, two ways of control among the proportional control, the integral control and the differential control. SOLUTION: A voltage from a thermistor 6 is converted to the digital value by an A/D port 9 by means of A/D conversion. In the next place, after converting the digital value to the numerical value in the linear relation to the detection temp. of the thermistor 6 according to the linear controlling table preliminarily stored by a ROM 10, a microprocessor 4 is allowed to control an adjusting circuit 3 by either two ways of the control among the proportional control, the integral control and the differential control. |
