| 摘要 |
PURPOSE:To execute easily position adjustment by counting a command pulse generated before the first one rotation signal is generated or a pulse generated by a pulse generator, after a limit switch is separated from a dog, and displaying it. CONSTITUTION:An original point resetting pulse CP provided from a control device CNU is supplied to a reversible counter RCN1, and a table TB is moved in the original point direction. When it reaches the vicinity of the original point and a limit switch LS contacts with a dog DG, a limit signal LSS becomes ''0'' from ''1'', an AND gate AN2 is opened, and an FF1 is set. At the same time, the signal LSS is supplied to the device CNU, and a speed of an orignal point resetting pulse is decelerated. In this way, the table TB moves at a low speed toward the original point, the switch LS is released, an AND gate AN3 is opened by a one rotation signal generated from a rotary encoder RE first, an FF2 is set, also contents of a counter RCN are cleared, and original point resetting is completed. In this regard, a counting value of a counter CNT is displayed on a CRT. |
