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2-14 Outline of Operation Rev. A

Confidential

Figure 2-21 Shutter mechanism (3)

The main components are: the shutter frame ("Frame, shutter"), the motor ("Motor, shutter"), the

reduction gear ("Gear, shutter reduct"), the drive cam ("Cam, shutter drive"), the slider ("Slider

shutter"), the drive lever ("Lever, shutter drive"), the shutter ("Shutter, slip"), the holder plate

("Holding plate, slip"), the open/close cam ("Cam, form stopper O/C"), the open/close form

stopper cam (Cam, form stopper O/C), the open/close slip lever ("Lever, slip O/C"), the open/

close stopper lever ("Lever, form stopper O/C"), and the front holder rollers (“Rollers, slip, hold,

front”).

The holder plate is installed at the end of the shutter. The plate uses two springs ("Spring, slip

holding plate, R" and "Spring, slip holding plate, L") to press the paper against the platen

("Platen, paper guide").

The end of the shutter guide shaft ("Shaft, shutter guide," attached to the shutter) fits into a slit

on the shutter frame ("Frame, shutter") and can slide parallel to the platen. The right and left

shutter shafts ("Shaft, shutter, L" and "Shaft, shutter, R") fit into the diagonal slits on the

corresponding ends of the drive lever ("Lever, shutter drive").

The drive lever and the slider ("Slider, shutter") can move left and right along the shutter lever

shaft ("Shaft, shutter lever"). The shutter drive shaft ("Shaft, shutter drive"), mounted on the

slider, fits into the spiral groove on the shutter drive cam ("Cam, shutter drive").

When the shutter motor ("Motor, shutter") is turned in the direction A1 (see Fig. 2-22) from the

home position of the shutter, the rotation of the shutter drive cam causes the slider and the drive

lever to move in the direction A2. The shutter itself moves upward, as it is lifted along the slope

of the slit on the shutter-drive lever.

The gear on the other side of the shutter drive cam engages and drives the slip open/close cam

("Cam, slip O/C") and the form stopper open/close cam ("Cam, form stopper O/C"). The slip

open/close cam turns at one second of the rate of the shutter drive cam.

Because the three cams rotate in phase, rotating the shutter motor some specified number of

turns (starting from home position) can select the sutter mechanism, the open/close state of both

the front feed roller and the form stopper.

motor, shutter

gear, shutter reduct

lever, shutter drive

cam, form stopper O/C

lever, slip O/Clever, form stopper O/C

cam, slip O/C

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Epson TM-J8000 Spezifikationen Seite 40