Filter
Top Products
4
Mechanical and Electrical
42
4.2 Image Rotation
The Prism Unit is rotated to correct any tilt of the image microfilm projected
on the Screen.
4.2.1 Prism Rotation
The Auto Image Rotating Knob is linked to the Auto Image Rotating
Variable Resistor (VR1). Turning the Knob clockwise or counterclockwise
turns the Auto Image Rotating Motor (M5) whose drive is transmitted via
a belt to the Prism Gear, thus turning the Prism Unit.
4.2.2 Auto Image Rotating Motor (M5) Control Circuit
When the Auto Image Rotating Knob is at the home position (center),
voltage at PJ2C-2 is set at DC2.5V and the Auto Image Rotating Motor
(M5) remains stationary.
PJ2C-2 reads fluctuations of the input voltages as the Auto Image
Rotating Knob is turned, there by determining the direction of rotation of
the Auto Image Rotating Motor.
Auto Image
Rotating Knob
Auto Image
Rotating Motor
(M5)
Belt
Prism Gear
Prism Unit
Pulley
Auto Image Rotating
Variable Resistor (VR1)