Specifications

2-16 Outline of Operation Rev. A
Confidential
Step 2
The shutter motor now turns in the CCW direction, returning the shutter mechanism to home
position. The paper-feed motor then starts again, feeding the leading edge of the paper to the
point where it is just about to reach the top slip holder guide ("Paper guide, slip hold, top").
Step 3
The shutter mechanism reaches the phase point indicated as T2 in the timing chart. At this point
the shutter has risen almost to the level of the slip holder paper guide, and the slip holder plate
("Holder plate, slip") is pressing the end of the slip against the platen so that it does not come
loose. Further feeding of the sheet advances it all the way to the top slip holder guide.
The shutter mechanism is returned to the home position; then printing begins.
Figure 2-24 Shutter mechanism timing chart
Detector mechanisms
The M-J8000 includes the following detector mechanisms.
Home-position detector mechanism Detects home position of the head carriage ass’y.
Carriage detector mechanism Detects errors in head-carriage operation.
Pump position detector mechanism Detects home position of the pump roller.
Ink-near-end detector mechanism Detects presence of ink in the ink cartridge.
Cartridge detector mechanism Detects presence of the ink cartridge.
shutter
sensor signal
form
stopper
roller, slip
hold, front
shutter, slip
operation
shutter home position
motor, shutter CW rotation
T1
T2
Low
High
High
Low
Low
Paper path open
Roller open
Paper path close
Roller close
Roller open
Up
Down