Lexmark W850n Manual page 131

Buffer roll assembly—
driven by drive motor
(buffer/transport)
Buffer diverter
Main paddle
motor—driven by
motor (entrance/paddle)
When printing multiple sets, while stapling the first set on the compiler unit assembly or ejecting it to the stacker
media bin, the first media of the second set will not be fed to the compiler unit assembly.
When the first media of the second set reaches the finisher, the buffer diverter solenoid is activated by the printer
command and by the sensor (finisher media entrance) to switch the buffer diverter gate.
Thus, the media route is switched into the buffer roll assembly's circumferential direction. (This operation is
called "buffer path".)
The first media of the second set is aligned with the second media, and then they are fed together to the
compiler unit assembly.
Even for one sheet of media, the buffer path operation is executed in the same way. The media is stacked
temporarily on the compiler unit assembly, and then ejected in the stacker media bin.
After buffer path is executed for the first media, if the second media of a different size comes, the first media is
fed to the compiler unit assembly, but the second one is fed to the compiler unit assembly without buffer path. At
this time, a certain delay time is provided to avoid the second media from colliding with the first one.
Sensor
(buffer path)
Buffer roll assembly
driven by drive motor
(buffer/transport)
Media
Buffer
diverter gate
Sensor (lower media exit)
Sub paddle—driven by
drive motor (entrance/paddle)
Eject clamp—driven
by eject clamp motor
Media eject shaft assembly—
driven by media eject motor asm
Compiler unit assembly
Lower media exit
roll assembly—driven by
motor (exit)
Compiler unit
assembly
4024-110
3-9
Diagnostic aids