HP V8.5 manual Introduction, Plotter Functions and Features, Power supplies

T H E O R Y O F O P E R A T I O N

5

5.1INTRODUCTION

The V8.5e plotter uses thermal technology to convert data from the host computer into plotted output. Host data enters the plotter main logic circuitry via the data port, and passes through the interface to the data buffer on the main logic board. Control and status signals enter the main logic board at the same time as the parallel data. The microcontroller converts the data from parallel to serial and sends the serial data to the printhead. One horizontal line or scan, consisting of a single row of dots, is plotted. The stepper motor advances the paper for the next scan. This cycle repeats until the plotted or printed image is finished.

5.2PLOTTER FUNCTIONS AND FEATURES

Power supplies

The logic circuitry and printhead of the plotter are powered by a 5 Volt DC output power supply. The thermal printhead and stepper motor are powered by a 24 Volt, 10 Amp DC power supply. Both power supplies feature an auto-switchable input, which adapts to different voltage or frequency inputs.

V8.5eRev2.2.2002 5-1