| 摘要 |
PURPOSE:To make a tape transferrable at every pattern accurately in a speedly manner, by comparing the normal timing of rotation in a main shaft with the appearance timing of marks on the tape put on at every regular interval, whle controlling the amount of adjustment accorind to the difference between them. CONSTITUTION:When each pulse delivery timing of a mark sensor 35 and a synchronous sensor 17 is not synchronized, an output signal corresponding to the slippage appears out of a comparator circuit 37, while a signal of pulse numbers corresponding the slippage is delivered out of an AND circuit 38. A digital-to- analog converter 39 takes in a signal out of a pulse generator 22 indicating the existing speed of a main shaft 11 and a pulse signal out of the AND circuit 28 or the amount of adjustment of this exsisting speed and feeds them to a control circuit 40, making an output shaft 32a of a servomotor 32 rotate as far as a portion for a speed asjusting amount in the existing speed. In consequence, rotation of a feed roller 33 is decelerated, thus each pulse delivery timing of these sensors 35 and 17 comes to congruity. |
