Staple home position detection
The staple home position is detected by the stapler/stacker driver as it monitors the staple home-
position signal (/HP) from the staple home-position sensor (PHO11).
During the detection, the stapler/stacker driver rotates the staple motor (M1304) clockwise for a
prescribed period of time. If the /HP signal does not change from "H" to "L" to "H", the driver detects
a stapler failure, stops the loads, and notifies formatter.
NOTE If the /HP signal does not indicate "H" after it changes from "H" to "L", the stapler/
stacker driver rotates M1304 counter-clockwise once. If the /HP signal changes from "L" to "H"
during the counter-clockwise rotation, the stapler/stacker driver detects a staple jam and
notifies the formatter.
Self-priming detection
The stapler/stacker self-primes when a new staple cartridge is inserted.
The stapler/stacker driver monitors the staple-ready signal (/READY) from the staple-ready sensor
(PHOI2). Self-priming is initiated when the stapler/stacker driver detects a Staple Presence signal
(LS) of "H" (meaning the staple cartridge has been replaced) after the driver has detected a LS
signal of "L".
When the stapler/stacker driver detects the /READY signal "H", it performs the staple operation until
the /READY signal becomes "L". However, if the /READY signal still indicates "H" after 11 repetitive
staple operations, the stapler/stacker driver detects a self-priming failure, stops the loads, and
notifies the formatter.
Staple level detection
The staple level is detected by the stapler/stacker driver as it monitors the Staple Presence signal
(LS) from the staple-presence sensor (PHOI3).
When the stapler/stacker driver detects an LS signal of "L", it determines that 20 staples remain and
sends a warning to the formatter. If the stapler staples 20 more times using the same stapler
cartridge, the stapler/stacker driver notifies the formatter that the stapler cartridge is empty.
186 Chapter 4 Theory of operation ENWW
To Next Page
Loading...