(1) Spacing operation
The carriage frame, which is connected to the,printhead and space motor, slides over the
carriage shaft in parallel with the platen. When the space motor rotates in counter-clockwise
direction the motor gear rotates against the space rack, moving the carriage from left to right.
For every revolution of the DC motor, the carriage frame moves 0.8 of an inch (20.32 mm).
The encoder disk rotates together with the motor interrupting the encoder sensor. The
position of the carriage frame can be determined by counting the number of times the
encoder sensor has been interrupted.
Carriage shaft
Printhead
Figure 3-4
3-15
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