Canon Paper Deck-AF1 Service Manual page 31

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Technology > Controls > Compartment Block > Lifter Failure Detection Control
■ Lifter Failure Detection Control
Three types of failure detection control are performed during ascension/descension of the
lifter.
The deck in which a failure has been detected cannot be used because of occurrence of an
alarm; however, other decks can be used continuously.
● Upper Limit Detection
In the case where the ascending lifter cannot be stopped due to a failure such as a failure in
the paper surface sensor (S104, S204, S304), the deck may be broken.
In order to prevent excess upward movement of the lifter, the lifter upper limit sensor (S105,
S205, S305) detects the upper limit of the lifter position.
● Lower Limit Detection
In the case where the descending lifter cannot be stopped due to a failure such as a failure
in the lifter HP sensor (S111, S211, S311), the deck may be broken.
In order to prevent excess downward movement of the lifter, the lifter lower limit sensor (S112,
S212, S312) detects the lower limit of the lifter position.
●
Foreign Body Detection
In the case that small-size paper has been set on the deck and the lifter goes up with foreign
matters or paper remained in the space, these foreign matters may
reach the upper limit before the paper surface sensor (S104, S204, S304) detects the paper.
When this happens, the deck will be damaged as the lifter continues to move
upward. The foreign body sensor (S106, S206, S306) detects foreign matters and controls
the lifter's upward movement.
MEMO:
Lifter failure control is performed in the same manner for all decks.
2 Technology > Controls > Compartment Block > Lifter Failure Detection Control
Lifter HP sensor flug
Lifter upper limit sensor flug
Lifter upper sensor
（S105/205/305）
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Lifter HP sensor
（S111/211/311）
Lifter lower limit sensor
（S112/212/312）
Foreign substance
sensor
（S106/206/306）
Foreign substance
sensor flug
F-2-19 F-2-19
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