Riso GR 3770 Technical Manual page 22

FLAT BED IMAGE SCANNING SECTION
THEORY OF OPERATION
TIMING CHART OF IMAGE SCANNER POSITION DETECTION
(1) When the image scanner is held close to the ADF read-in position:
scanner table Set SW ON
Image scanner
home position sensor
Image scanner
ADF shading sensor
Flat bed read
pulse motor
(2) When the image scanner is in the image scanner ADF shading sensor position:
Image scanner
ADF shading sensor
Flat bed read
pulse motor
(3) When the image scanner is held between the image scanner home position sensor and the image
scanner ADF shading sensor:
Image scanner
home position sensor
Image scanner
ADF shading sensor
Flat bed read
pulse motor
GR3770
Power ON or
OFF
Light receiving
OFF
3 mm
HP direction
<1>Max3s
<2>
ON
OFF
3 mm
HP Scanning
direction direction
200 ms
OFF
OFF
100% speed
3 s
Further moved to stop position
Cut off
ON
Light
receiving
1 mm
Scanning
direction
100% speed
200 ms
Cut off
1 mm
100% speed
68% speed
<2>
3 - 4
Cut off
ON