Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS - Manual (Page 210)

Integrating Axes
Chapter 9
9Ć9
4. Jog the axis in either direction at maximum speed (rapid traverse rate
with 127% feedrate override). If you don’t have enough axis travel
in which to adjust the potentiometer, disconnect the servo motor
from the leadscrew as in the open-loop procedure (see section titled
“Open-loop Procedure,” in this chapter). Set the potentiometer (see
section titled “Connecting the Tachometer,” in chapter 6) for a 50V
maximum tachometer signal at the 1771-ES expander.
5. If the tachometer voltage is less than 10V, enter a conversion factor
in the last word of the parameter block. The conversion factor
multiplied by the full scale velocity command voltage must be a
value less than the tachometer voltage.
Figure 9.3
1771ĆES Expander Test Points and Potentiometers
11066
White
Tach
Coarse
Tach
Fine
Yellow
6. With power off, remove the potentiometer from between the
tachometer signal and the 1771-ES expander. Measure the resistance
the potentiometer was providing. Replace the potentiometer with a
fixed resistor of equivalent value to limit the tachometer signal into
the 1771-ES expander to 50V.