CUT-SHEET FEEDER CONTROL METHOD

摘要

PCT No. PCT/JP89/01061 Sec. 371 Date Jun. 21, 1990 Sec. 102(e) Date Jun. 21, 1990 PCT Filed Oct. 16, 1989 PCT Pub. No. WO90/04520 PCT Pub. Date May 3, 1990.A method of controlling a cut-sheet feeder installed on a printer to feed a cut sheet from a sheet hopper (1) included in the cut-sheet feeder to the printing unit of the printer at a sheet feeding speed corresponding to that of the printer. The printer gives a correction signal (S1) of a predetermined pulse width to the cut-sheet feeder, and then the cut-sheet feeder converts the pulse width of the correction signal into a corresponding number of pulses of a clock signal generated by its control unit (25), and obtains the difference between the number of pulses of the clock signal and a predetermined reference value to determine the deviation of the frequency of the clock signal from a reference frequency. The difference between the number of pulses of the clock signal and the reference value is added to a reference motor controlling value for driving a stepping motor (4) at a reference speed to obtain a corrected motor controlling value. When the printer gives a sheet feed command signal (Sf) to the cut-sheet feeder, the stepping motor is driven for rotation according to the corrected motor controlling value.