| 摘要 |
PURPOSE:To prolong a time required to take up a beltlike body for coating a heat roller with a releasing agent and to reduce the human and physical loads in replacing the beltlike body by decreasing the difference in take-up running speed between the winding starting part and ending part of the beltlike body. CONSTITUTION:When a printing force 1 is fixed, a printing force feed signal is inputted to a driving pulse generating circuit 11 through a printer control circuit every time the printing force 1 runs. Further, a take-up diameter detection signal corresponding to the take-up extent of the beltlike body 4 is inputted to the driving pulse generating circuit 11 through a take-up diameter detector 12. Then, when the value of the take-up diameter detection signal is zero, namely, when the take-up diameter of the beltlike body 4 around a take-up roller 6 is smaller than a specific value (d), the driving pulse generating circuit 11 counts the printing form feed signal up to L1 and outputs a driving pulse to a motor driver 10, which converts the driving pulse into a phase exciting signal phiA-phiD, so that a stepping motor 9 is driven at a specific rotating speed N1 on the basis of the phase exciting signal. |
