Specifications

Chapter 7: Using the Diagnostic Tool
7-41
ROS Controls
Scanner Motor Control
The following table shows the status of the scanner motor during all modes of operation.
Print Mode Scanner Motor Status
ESS (Controller)
Mode
The Motor is controlled by the printer controller.
User Operation Mode The Motor is off.
Printing Test Mode The Motor is ON at Power-on, and remains ON during this mode
Diagnostic Mode The Motor is OFF.
Configuration Mode The Motor is ON at Power-on, and remains ON during this mode.
The relationship between scanner motor speed and print resolution
The printing speed depends on how the laser uses the ROS Assembly
Polygon Mirror. In the 12 PPM model, the laser beam strikes every mirror
surface on the rotating Polygon Mirror Assembly.
The following table shows the relationship between the speed of the Scanner Motor and the
image resolution of the printer.
Print
Resolution
(Dots per Inch)
Scanner Motor Speed
(Revolutions per
Minute)
300 7540
600 15080
ROS Preparation
The Scanner Motor starts to spin at the beginning of ROS preparation. ROS preparation ends
when the Scanner Motor reaches the rated speed. At rated speed, the SOS signal intervals are
shorter than the READY reference value (during three consecutive samplings of the SOS signal
interval.
ROS Reference Values
READY Reference Value
98% of the Scanner Motor revolutions satisfy the rated SOS signal interval
criteria..READY Reference Value enables printer operation
FAIL Reference Value
FAIL Reference Value inhibits printer operation. If the speed
of the scanner motor exceeds rated speed by more than 1%,
the laser beam does not reach the SOS sensor. The LCD
then displays a U2 fault Code