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SCANNER
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6.4 Description of Operation
6.4.1 Scan motor (M1)
Fig. 6-6
• Scanning of an original placed on the original glass
This motor drives the carriages-1 and -2 through the timing belt and carriage wire. First, the scan
motor drives the carriages-1 and -2 to their respective home positions. The home positions are
detected when the carriage-1 passes the home position sensor (S6). When the [START] button is
pressed, the both carriages start to move and scan the original on the glass.
• Scanning of an original placed on the RADF
The carriage-1 stays at the shading position during shading correction, and at the scanning posi-
tion during scanning operation.
• Scanning velocity
The scanning velocity at color modes is reduced to a half of it at the Black Mode.
Wire pulley
Scan motor Carriage-1
Motor speed-reduction pulley
Motor pulley
Carriage-2
Idler pulley
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