Figure 5-3. The Paper Pick Process; Figure 5-4. Paper Clamp Opening To Receive A Sheet Of Paper; Drum Loading - Digital Equipment DECcolorwriter 1000 Service Manual

5
Theory of Operation

Drum loading

5-10
DECcolorwriter 1000
Caution
Never rotate the pick rollers in the reverse direction.
Aligning
roller
Paper-
pass
sensor 2
Pick-up
rollers

Figure 5-3. The paper pick process

As the paper passes beyond the aligning rollers, it triggers paper-pass sensor 2. This
activates the transfer roll feed motor long enough to apply tension to the transfer roll,
pulling it taut. The aligning rollers carry the sheet of paper to the spring-loaded paper
clamp, waiting in the clamp open position to capture the leading edge of the paper.
Drum
rotates
backward
to open
clamp
Paper
clamp opens
as it pushes
against stop

Figure 5-4. Paper clamp opening to receive a sheet of paper

Paper-
pass
sensor 1
Thermal head
Drum
Drum stop
(attached to engine
frame, not drum)
Path from
Feed paper tray
roller
Path from
second
feeder
paper tray
Paper
tray
8699-10
Transfer
roll
Paper-
pass
sensor 2
Aligning roller
Paper
8699-11A