Canon LaserBase MF8180C, Руководство по обслуживанию

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Chapter 2
2-32
3. controls the speed at which paper is moved to suit the temperature inside the machine
2.4.2 Other Control
2.4.2.1 Skew Correction Function
0008-1720
This function is utilized to correct the skew of the paper to be fed, using the registration shutter method.
The operations of this function are discussed below.
When paper is fed to the registration roller, the leading edge of paper is pushed against the registration shutter to correct a skew (1). Paper is warped as the feed
roller keeps pushing it when it is pushed against the shutter (2). The shutter is lifted up by the stiffness of paper as paper warps, and paper passes through the shutter
(3). It allows the skew of paper to be corrected.
F-2-47
2.4.2.2 Feed Speed Control
0008-1721
In this control, a feed speed is changed based on the types of the fed paper in order to prevent fixing defects.
The DCNT Board changes a feed speed in two levels based on a paper type specification command sent from the SCNT Borad.
Types of paper and their feed speeds are indicated below.
T-2-6
2.4.2.3 Detecting the Machine Inside Temperature
0008-1723
As a means to prevent overheating inside the machine, the machine is equipped with a thermistor (TH3) used to detect the temperature inside the machine (found
near the toner cartridge motor).
If the STNT board finds that the machine inside temperature has exceeded an upper limit (Td) at time of continuous printing/copying, it will increase the distance
between sheets to prevent overheating. If the temperature falls below a specific level (Tu), on the other hand, it changes the sheet-to-sheet distance to normal.
Media type Print type Feed speed
Plain paper Full-color Normal speed
Mono-color
Heavy paper Full-color
Mono-color
OHP sheet ------------
Mono-color
Thick paper Full-color
Mono-color
Special paper Full-color Half speed
Mono-color
Envelope Full-color
Mono-color
Label Full-color
Mono-color
Registration shutter
Paper
Registration shutter
Paper
[1]
[2]
[3]
Registration roller