Toshiba e-STUDIO163 Service Manual page 112

2) Polygonal motor unit
This unit consists of the polygonal motor (M4), polygonal mirror and polygonal mirror cover.
a. Polygonal motor (M4)
This motor rotates the polygonal mirror in high
speed.
The DC motor controls the rotation speed of
the mirror motor as follows:
During ready: 10,000.00 rpm
During printing
: 23,562.99 rpm (600dpi)
b. Polygonal mirror
One laser beam emitted from the laser diode
is reflected by this mirror. As the polygonal
mirror is rotated by the polygonal motor (M4),
the reflected laser light moves in sync with the
rotation. The direction of the movement is the
primary scanning direction of the image. One
scan is performed on one plane of the polygo-
nal mirror.
As the polygonal mirror has six planes, six
scans are performed in one rotation of the
polygonal mirror.
e-STUDIO163/203 LASER OPTICAL UNIT
One scan is completed by completion of steps (A)
to (C). One scan is performed on one plane of the
polygonalmirror. Six scans can be made with one
rotation of the polygonal mirror.
8 - 4
T.B.D.
Fig. 8-4
December 2005 © TOSHIBA TEC