Epson 7000 사용자 설명서

To produce high quality printouts, the printer must maintain a constant 
distance between the printhead nozzles and the paper. To do this the printer 
measures the thickness of the paper and adjusts the height of the carriage 
accordingly.

The carriage is composed of two parts; the main carriage which is secured to 
the CR guide rail via bearings, and the subcarriage which holds the 
printheads. The subcarriage is secured with a cam, and due to the cam’s 
shape, the subcarriage can be raised or lowered depending on the rotation of 
the cam. See Figure 2-17.

The platen gap adjustment is linear; the nozzle surface is constantly parallel to 
the paper surface.