Figure 5-8 The Cap/Wipe/Purge Assembly And Vacuum System - Tektronix Phaser 380 Service Manual

Vacuum for the purge cycle is obtained from a vacuum pump and a vacuum
accumulator. A small vacuum pump, running for about 75 to 90 seconds, creates
a strong vacuum in the vacuum accumulator. Then an air valve is energized for
a fraction of a second, exposing the printhead faceplate to the strong,
accumulated vacuum to suck debris and bubbles out of the printhead nozzles.
With the air valve once again de-energized, air is metered through the 7-mil
orifice to gradually release the vacuum at the faceplate.
Cap/wipe/purge assembly transport
Drum
Cap/wipe/purge assembly
home sensor (on I/O 2 board)
Vacuum system
Pump
Vacuum
accumulator

Figure 5-8 The cap/wipe/purge assembly and vacuum system

Printhead
Cap/wipe/purge
assembly belt
Solenoid valve "unenergized"
Air
Solenoid valve "energized"
Theory of Operation
Cap/wipe/purge
assembly motor
Cap/wipe/purge
assembly
Wiper element
Cap/wipe/purge assembly
Filter Air
7 mil
orifice
9661-132
Service Manual
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