HP DesignJet ColorPro CAD Manual de usuario descargar pdf (Pagina 135)

Functional Overview 6-15

Paper Paths and Components

Output stack sensing is based on fixed field proximity sensing using two LEDs side by

side.These LEDs have both light source emitters as well as receivers. In short, it is based

on the concept of fixed distance sensing and ignoring any objects that lie beyond their

sensing range regardless of object surface reflectivity e.g. plain paper vs. glossy paper.

(But Transparencies will affect the sensing distance, they are detected earlier by 8mm)

Sensor is mounted on the carriage wall directly on top of the BOF of media (which is

approx. 10mm). As BOF is the non-printed area, this is used as the reflecting surface for

the light so that the variation in colour/text content of the output media does not have any

influence. Fixed field sensors compare the amount of reflected light that is seen by two

differently aimed receiver optical elements. A target is recognised as long as the amount

of light reaching receiver seen by one receiver is greater than other.

Distance of sensing( from the bottom of the sensor to paper full level) = 35mm

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HP DesignJet ColorPro CAD Manual de usuario Pagina 135