Epson 7000 Benutzerhandbuch

To print on paper as wide as A1+ (24 inches), the carriage must be quite 
stable and must travel further than the usual carriage. To increase stability, 
the SP 7000 uses a carriage guide rail instead of the carriage guide shaft. The 
carriage comes into direct contact with the printer frame using a set of 
bearings which are attached to the carriage.

The CR motor (DC motor) drives the carriage, and the Linear Encoder sensor 
in combination with the T-Fence (plastic timing fence found underneath the 
carriage guide rail) determine the lateral position of the carriage. As shown in 
Figure 2-7 below, the Linear Encoder reads the timing stripes to determine the 
position of the carriage as well as the carriage speed, and this data is sent to 
the software servo.

The following sensors are used in combination with the carriage components:

†

Home Position Sensor
This optical sensor activates when the CR Guide Rail flag enters the 
space between the light emitter and the light receiver. The flag is 
located on the carriage and the sensor is located to the right of the 
maintenance assembly. The HP sensor sends an “On” signal when 
the carriage is in the home position.

†

Linear Encoder sensor
This sensor is located on the back of the carriage (cutter housing 
section). This reflective photo sensor helps determine the exact 
carriage location by counting the clear and dark sections of the T-
Fence. The Linear Encoder sends a pulse to the printer logic as a PTS 
(Print Timing Signal). The shaded sections have a distance equal to 
180 dpi.