Sensor for sensing media in a pen plotter

Details Sensor for sensing media in a pen plotter Sensor for sensing media in a pen plotter

G - Physics

06

K

G06K 15/00 (2006.01) G06K 15/22 (2006.01)

Patent

CA 2112686

This invention is directed to the use of a single optical sensor (38) to replace two mechanical sensors (16) in a pen plotter. A light beam (30) is directed through a slot (26) in the plotter's main platen (20). The light beam (30) is detected to provide a sig- nal output. Servo fan motors (14) of the plotter are turned on when the light beam (30) is broken by media (42) placed into the plotter for plotting as one function. A load sequence of the plotter is started only after a start command is input by a user through a control console (36) and the light beam (30) is broken by media (42) placed into the plotter for plotting as a second function.

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