Epson DFX-5000+, Service Manual

Page: 60 / 223

Operating Principles
T Roller
Front PE
Figure 2-9. Rear Tractor Assembly Operation
Tractor Wire Operation
The printer is equipped with a tractor wire (white line) to prevent paper jams
when continuous paper is loaded from the front or rear entrance. The tractor
tension spring on the right side frame pulls the wire and releases the stress on the
continuous paper being fed. Figure 2-10 shows how the tractor wire operates.
The front left tractor sprocket or rear right tractor sprocket is fixed in position by
the shape of the bottom frame of the printer mechanism, while the other sprocket
(the front right sprocket or rear left sprocket) can move along the tractor shafts.
When the tractor release lever is released, the sprocket can move smoothly from
side to side along the tractor shafts. When the tractor release lever is engaged, the
sprocket can move along the tractor shafts, but it cannot move smoothly, because
the tractor wire tension is valid.
In the Figure 2-10, point A shows the movement range of the left tractor sprocket
when the tractor release lever is released. Point B shows the movement range of
the right tractor sprocket when the release lever is engaged or released.
2-8
EPSON DFX-5000+ Service Manual