Epson Perfection 4870 Photo - TPU Carriage Moving Mechanism Operation

Perfection 4870 Photo Revision A
OPERATING PRINCIPLES Engine Operation Outline 23
2.1.2.2 TPU Carriage Moving Mechanism operation
The TPU Carriage Unit slides along the guide rail in the sub scanning direction. To
perform this sliding operation, the TPU CR (Carriage) Motor transmits its drive power
to the TPU CR Timing Belt, which is fixed to the Carriage Unit, via the Drive Pulley
and the Deceleration Gear. The TPU CR Motor uses a stepping motor and is driven
under open loop control. (Refer to figure 2-6.)
Figure 2-6. TPU Carriage Operation
Front
Rear
TPU Carriage Unit
Driven Pulley
TPU CR Timing Belt
TPU CR Motor
Deceleration Gear
Drive Pulley