Paper Feed Mechanism - Epson DFX-5000+ Service Manual

Operating Principles
Figure 2-6. Platen Gap Adjustment Mechanism

Paper Feed Mechanism

Figures 2-7,2-S, and 2-9 show the paper feed mechanism. After you load paper, it
is fed by the tension roller, PF roller, and front or rear tractor assembly. The PF
motor rotates the tension roller and tractor select gear (Figure 2-7) and moves
either the front or rear tractor assembly. The rotation ofthe paper feed
transmission gear rotates the tractor select gear, which can engage either tractor
train. The tractor select mechanism alternates the engagement ofthe rear tractor
assembly gear train and front tractor assembly gear train. (Refer to Ribbon Feed
and Tractor Select A4echanisms, later in the chapter for more information.)
The front and rear PE sensors are incorporated in the tractor sprocket. When
paper is loaded, the paper pushes the leaf spring and blocks the photo interrupter.
When no paper is loaded, the photo interrupter is not blocked. The top PE sensor
is attached to the upper paper guide and is used with the reflection plate on the
paper bail assembly. When paper is loaded, the paper surface reflects the beam;
when there is no paper, the beam is absorbed (not reflected). The pull tractor
sensor monitors whether the pull tractor is installed.
2-6
EPSON DFX-5000+ Service Manual