JPS5543679A - Pen control system for x-y plotter - Google Patents

Abstract

PURPOSE: To shorten the pen delay by giving a previous calculation to the pen delay and then starting the operation before the pen reaches the prescribed up- or down- point via the pen-down or pen-up order which gave the correction to the pen delay.

CONSTITUTION: The position information for the shift of the pen head plus the information indicating the pen is up or down are generated from generation part 1 where the picture data is generated to be supplied to the X-Y plotter. These information are given to data process circuit 2, where the data is analyzed to deliver the data of the position where the pen-up or pen-down order is given. Then the pen delay is corrected previously at circuit 2 to be applied to arithmetic circuit 3 and pen-down control circuit 8. And the instantaneous position and velocity are calculated through circuit 3 for the head operation to drive X or Y axis motor 6 or 7. On the other hand, a comparison is given at circuit 8 between the up- or down-position data given from circuit 2 and the instantaneous position sent from circuit 3. And when the coincidence is obtained, pen actuator 10 is controlled to give the pen delay.

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