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REV.-A
2.4.1.8 Paper Change Mechanism (Friction Tractor)
Paper changeover is effected by means of the release planetary gear, which leads the paper feed motor's
power based on the action of the release solenoid. The release solenoid generates switching of the
trigger lever.
When the trigger lever is "closed:' the release planetary gear is locked, so that the planetary gear does
not interact with the paper feed gear. Therefore, the paper feed motor can only perform normal paper
feed.
When the trigger lever is "open," the planetary gear is connected to the paper-feed motor, and the
motor's operation is as follows:
When feeding is in normal direction:
When feeding is in reverse direction:
switch over is from friction mode to tractor.
switch over is from tractor mode to friction mode.
The type of mode in use is detected by means of the release sensor, which is a microswitch attached
to the release lever. When friction mode is in effect, the release lever is open; and when tractor mode
is in effect, the release lever is closed.
Release Lever Specifications
Detection method:
Microswitch
Voltage:
5VDC±5% (Resistance load)
Current:
1.0 - 5 mA
Release Trigger Solenoid Specifications
Type:
DC solenoid
Drive voltage:
24VDC± 10%.
Coil resistance:
33.5 ±7%
Drive current:
Average - 716mA
Maximum - 84 7mA
Release (Trigger)
solenoid
Figure 2-42. Paper Change Mechanism
2-39
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