Table 4-6 Motor control circuit
Name Purpose Type Failure detection
Jogger motor (M2100) Shift jogger guide outward
(clockwise) and inward
(counter clockwise)
Stepping motor Available
Feed motor (M2101) Rotate feed roller and
stacking roller
Stepping motor Not available
Leading end alignment -
separation motor (M2102)
Separate stacking roller
(clockwise) and to rotate
leading end alignment roller
(counterclockwise)
Stepping motor Available
Stapling motor Staple (in stapling unit) DC motor Available
Jogger motor failure
The staple stacker driver PCA recognizes the jogger motor failure and notifies the formatter of error
status when the jogger guide does not move from the specific position even if the staple stacker driver
PCB rotates the jogger motor. There are two cases for the specific position:
●
The jogger guide stays in the “home” position
●
The jogger guide stays in another position from the beginning
Leading-end alignment separation motor failure
The staple stacker driver PCA recognizes the leading-end alignment separation motor failure. Then, it
notifies the formatter of error status when the home position of the upper stacking roller is not detected
for a specified time after the upper stacking roller separation has been operated.
Stapling motor failure
The staple stacker driver PCA recognizes the stapling motor failure and notifies the formatter of the error
status. This occurs when the stapler home position is not detected during a second operation after 0.7
second from when the stapling motor starts to rotate during the initial drive or when recovering from the
paper jam removal.
Feed/stack system
The feed/stack system feeds and delivers paper to the stacking tray. The feed/stack system consists of
various rollers and guides. The staple stacker driver controls each motor and solenoid for the feed/stack
operation. The feed/stack system in this staple stacker has five sensors that are used to detect the arrival
and passage of the paper, as well as to detect home position of the upper stacking roller and the jogger
guide. If the paper does not reach or pass the sensors within a specified time, the staple stacker driver
PCA determines the paper jam and notifies the formatter.
The staple stacker has two modes:
●
Staple mode: To staple the print paper and stack the pile on the stacking tray
●
Stacker mode: To stack the print paper on the stacking tray without stapling
160 Chapter 4 Theory of operation ENWW
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