| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a device and method of controlling a motor wherein slip and backlash are prevented in a sheet feeder and a sheet is fed by a preset feed length. <P>SOLUTION: A subtractor 47 subtracts a number of feel roll pulses from a number of length measurement pulses to find a deviation in the number of pulses and a differentiator 47 carries out temporal differentiation to find a difference in speed. A BL/SL determining means determines the presence of backlash and slip based on the difference in speed. A backlash correction controlling means 50 outputs a phase correction value for preventing the backlash based on the deviation in the number of pulses. A slip correction controlling means outputs a feeder acceleration time after correction and a feeder deceleration gain value for preventing slip based on the difference in speed. A main controlling means 44 determines respective speed commands Q using the phase correction value, the feeder acceleration time after correction, and the feeder deceleration gain value. This prevents backlash, slip during motor 6' acceleration, and slip during motor 6' deceleration. <P>COPYRIGHT: (C)2009,JPO&INPIT |
