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X-Axis Motor
The x-axis motor, mounted to the rear of the library, is a two-phase stepper motor
which has 1.8 degrees (0.005 inches) per step resolution. One end of the motor shaft
holds a flanged pulley that engages the horizontal drive belt. The opposite end is an
idler pulley. The x-axis motor is micro-stepped to provide accurate open loop
position control. The position loop is closed through the x-axis confirmation sensor
and flags.
The horizontal drive belt, an open-ended belt (not a continuous loop), is driven by
the x-axis motor to propel the x-carriage assembly along the horizontal rail.
Chapter 1
Library Overview
15
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