Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS User Manual
Page 211
Integrating Axes
Chapter 9
9Ć10
7.
Restore power and jog the axis in either direction. While the axis is
moving, measure the voltages at the white and yellow test points on
the 1771-ES expander (DAC and tachometer voltages, respectively)
with respect to terminal 4 (analog return) on the right wiring arm of
the 1771-ES expander (Figure 9.4). These voltages should have the
same polarity (+ when jogging in the positive direction, -while
jogging in the negative direction).
Figure 9.4
Tachometer Calibration Procedure Voltage Reading
V
Yellow
Voltmeter
Analog Return
1771 -ES Expander
11067
White
8.
While jogging the axis, adjust the tach course potentiometer
counterclockwise until the tach cal indicator just changes state. Then
jog the axis in the other direction and turn the tach course
potentiometer clockwise until the tach cal indicator begins to flicker.
9.
Turn off the tachometer calibrate bit in the command block.
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