Canon imageRUNNER ADVANCE C5051 Series Service Manual page 141

2
Technology■>■Pickup■Feed■System■>■Various■Controls■>■Duplex■/■Delivery■Assembly
● Duplex■Control ■
Duplex■Feed■Control
On■this■machine,■the■paper■is■revered■outside■the■machine■with■using■the■reverse■mouth.■
After■that,■feed■operation■is■performed■by■340mm■/■sec■on■imageRUNNER■ADVANCE■C5051■
/■C5045■(300mm■/■sec■on■imageRUNNER■ADVANCE■C5035■/■C5030).The■paper■fed■to■the■
duplex■path■is■transferred■to■the■duplex■re-pickup■position■unless■there■is■paper■on■the■path■
at■the■downstream■side.■If■there■is■paper■on■the■downstream■path,■it■is■delivered■from■the■
reverse■path■or■it■stops■at■the■duplex■upstream.■
In■case■of■output■to■the■First■/■Second■Delivery■Mouth,■5-sheet■circulation■is■used■for■small■
size■(LTR■or■smaller);■however,■3-sheet■circulation■is■used■for■large■size■(larger■than■A4R).■
This■is■because■2■sheets■of■paper■cannot■wait■on■the■duplex■feed■path.
In■case■of■output■to■third■delivery■mouth,■3-sheet■circulation■is■used■for■middle■size■(A4R■
or■smaller);■however,■1-sheet■circulation■is■used■for■large■size■(larger■then■A4R)■since■the■
succeeding■paper■enters■the■reverse■path■before■the■preceding■paper■goes■through■the■
reverse■path■and■jam■will■occur.
Following■is■the■each■duplex■reverse■position■and■the■number■of■sheet■circulation■by■size.
First■/■Second■Delivery
Small■size■(LTR■or■smaller)
Middle■size■(A4R■or■smaller)
Large■size■(larger■than■A4R)
Compared■to■the■conventional■model■(imageRUNNER■C3380),■feed■speed■at■the■duplex■feed■
assembly■is■slowed■down.■This■is■to■get■the■precise■feed,■to■reduce■the■noise■and■the■motor■
loads.■However,■by■changing■the■circulation■algorism,■the■speed■is■accelerated■when■printing■
a■number■of■sheets■and■51■sheets■/■min■speed■is■achieved.
2 Technology■>■Pickup■Feed■System■>■Various■Controls■>■Duplex■/■Delivery■Assembly
Third■Delivery
5 3
3 3
3 1
T-2-64
Duplex■Wait■Control
To■realize■5-sheet■circulation,■there■are■2■duplex■wait■positions.■Following■is■the■duplex■wait■
position■for■small■paper.
50mm
Duplex wait position
両面入口待機位置
Since■the■curve■of■duplex■path■shape■gets■steeper■at■the■leading■end,■as■duplex■wait■position■
gets■closer■to■the■registration,■curl■tends■to■occur■frequently.■For■the■paper■smaller■than■A3,■
the■duplex■wait■position■is■50mm■away■from■the■Registration■Sensor■toward■upstream■in■due■
consideration■with■the■productivity.■In■case■of■A3■paper■or■larger,■the■sheet■interval■is■wide■
enough■to■satisfy■the■productivity,■so■the■position■which■avoids■curl■occurrence■and■is■85mm■
away■from■the■Registration■Sensor■on■the■upstream■side■is■to■be■the■duplex■wait■position.
■
2-105
Duplex inlet wait position
42.4mm
F-2-144
2-105