Canon imageRUNNER ADVANCE C5051 Series Service Manual page 139

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Technology■>■Pickup■Feed■System■>■Various■Controls■>■Fixing■/■Registration■Assembly
■ Fixing■/■Registration■Assembly ■
● Overview ■
■Parts■/■Drive■Configuration
Registration motor(M19)
Registration sensor
(PS33)
Registration sensor flug
Cassette 1 pre-registration
sensor(PS55)
Pre-registration sensor flug
Transparency sensor(UN51)
Vertical path roller
2 Technology■>■Pickup■Feed■System■>■Various■Controls■>■Fixing■/■Registration■Assembly
Registration roller
Vertical path sensor(UN53)
F-2-141
● Registration■Control ■
OHP■Detection
As■the■countermeasure■for■when■the■paper■other■than■transparency■film■is■fed■in■transparency■
mode,■OHP■sensor■is■used■as■white■paper■detection■to■identify■whether■the■fed■paper■is■
transparency■or■not.■However,■since■this■is■not■used■to■identify■the■transparency■for■CLC,■jam■
will■occur■when■CLC■paper■is■fed.
Registration■Control
To■make■the■paper■straight-enter■the■transfer■assembly,■registration■control■is■executed.
After■the■paper■passes■through■the■Registration■Sensor,■the■drive■of■the■Pickup■Motor■(Multi-
Purpose■Tray■Pickup■Motor,■Duplex■Pickup■Motor)■is■turned■OFF■to■stop■the■paper■by■the■
distance■from■the■Registration■Sensor■to■the■Registration■Roller■with■arch■amount■added.■
To■reduce■the■noise■when■the■paper■enters■the■Registration■Roller,■speed■is■decreased■by■
200mm■/■sec■upon■Registration■Sensor■ON.
However,■if■the■distance■with■the■preceding■paper■is■too■far,■productivity■cannot■be■satisfied.■
Moreover,■the■paper■may■be■late■for■the■image.■In■such■case■only,■the■speed■is■changed■by■
246mm■/■sec■when■the■paper■enters■the■Registration■Roller.
● Fixing■Arch■Control ■
To■always■feed■the■paper■to■the■Fixing■Unit■in■optimal■status,■this■control■is■to■monitor■the■
paper■slack■(arch)■condition■and■to■switch■the■feed■speed■at■the■Fixing■Motor■according■to■the■
status.
This■is■executed■between■the■Secondary■Transfer■Unit■and■the■Fixing■Unit.■When■the■
Pressure■Roller■of■the■Fixing■Unit■expands■with■heat,■circumference■of■roller■is■also■increased.■
Thus,■even■though■the■number■of■rotation■is■consistent,■the■feed■speed■at■the■fixing■side■is■
faster■than■the■feed■speed■at■the■secondary■transfer■side.■To■fix■this,■change■the■speed■of■the■
Fixing■Motor■according■to■the■arch■condition■using■the■Fixing■Arch■Sensor■1&2.
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