Booklet Operation - Lexmark X850e Service Manual

7500-XXX
• Stapler unit motor (in the stapler unit assembly)
—
A DC motor to activate the stapler unit assembly for stapling
—
Clockwise rotation of this motor enables stapling, while counterclockwise rotation returns the stapler unit
assembly.
Sensor (stapler carriage HP)

Booklet Operation

The booklet media entrance roll assembly driven by the booklet media entrance drive motor will deliver media
from the finisher entrance and stack it against the booklet end guide in the booklet unit. When the booklet end
guide is at the bottom of the booklet unit it will continue to accept media. Once the proper amount of media is
reached, stapling will occur and booklets will be delivered in sets to the booklet media bin.
The booklet media exit roll assembly is driven by booklet folding/exit drive motor assembly and delivers booklets
to the booklet media bin. During printing, paper drawn to the booklet compiler is aligned by the booklet paddle
shaft assembly which is driven by booklet paddle shaft drive Motor.
When a sheet of paper enters the booklet compiler, tamping operation is performed by two moving tampers
moving towards the front and rear. The front tamper is driven by front booklet tamper drive motor; rear booklet
tamper drive motor. Tamping operation will be performed a final time after the last sheet is received.
Documents in the compiler tray are assembled towards the front. For center stapling and folding positions, one
set of document is assembled and moved to the center.
The booklet end guide is lifted to where the fold will divide the paper into two equal halves. When the printouts
are stapled, the booklet end guide will be raised so that the stapled position is at the folding position. The
stapling position is slightly lower than the folding position center line.
When the movement from the booklet folding/exit drive motor is transferred to the knife through the engagement
of the sector gear, the knife will thrust forward and then return to the original position after one full rotation. At the
folding position, the knife is thrust forward to fold the paper between booklet folding roll and booklet folding nip
roll.
Paper is folded into two halves by the booklet folding roll driven by the booklet folding/exit drive motor and is
delivered to the booklet media bin by the booklet media exit roll assembly. The booklet media bin belt will move
at a fixed interval for every set of booklets that are created.
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MFP Finisher Service Manual
Stapler carriage motor asm
Stapler
rack gear