FX-3R Maintenance Guide
2-8
d After the Z-axis motor has been assembled, obtain the PWB top surface height of the MS
parameter.
If this value does not fall between −2 and +2mm, readjust the positional relationship of the
Z-motor axis and the ball screw, obtain the MS parameter again, and check to make sure that
the PWB top surface height falls between −2 and +2mm.
Stroke for one
rotation of the
Z-axis ball screw
6 mm
2 to
2 mm
Stable area
Z-phase signal of the
Z-motor encoder
Figure 2-2-1-4 Z-phase signal of the Z-motor encoder
【Origin Return Operation】
The Z-axis is rotated upward to make it in contact with the stopper. After that, when the torque
generated by the motor reaches the set torque threshold value, the Z-axis is rotated downward
and the 1st Z-phase is determined to the origin.
Rev. 1.00
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