CONTREX CXB2040 - Manual (Page 2)

READ THIS!
Model CXB1525/CXB2040
Brushless Servo Motor/Amplifier SETUP
When a servo kit is purchased from CONTREX, the resolver has been aligned, and the
motor/amplifier tuned for a 1:1 inertia match. The factory settings of the potentiometer's and
switch's are recorded in the CXB1525/CXB2040 manual and on SK1650 for easy reference.
The only potentiometer's that may need adjustment are the Loop Gain pot, which is shipped set
at full CCW (off) and the Compensation pot, if the inertia is not a 1:1 match.
M-SERIES PRODUCT SETUP
There are drawings included with the servo kit showing the proper wiring between the CXB
amplifier and the M-Series. On the M-Series, set the Isolator Voltage Reference jumper to
"Internal Reference" as shown in chapter 2 of the M-Series manual. Next adjust the "On Board
Scale Pot" for a maximum output voltage of 10VDC as shown in chapter 4 of the M-Series
manual. Reconnect all of the labeled wires between the motor and CXB amplifier. Also make
sure there is a good earth ground connection to the CXB amplifier chassis and from the CXB
amplifier chassis to the motor.
AMPLIFIER SETUP
Once the wiring is complete, enable the CXB amplifier with the M-Series powered up, but NOT
in RUN. There is now a zero volt speed command to the CXB amplifier. Slowly rotate the Loop
Gain pot CW from its present "off" (full CCW) position to the "on" position (full CW). The
motor shaft should now hold position. If the motor acts erratically or runs at high speed turn the
Loop Gain pot full CCW, shut off power and check wiring.
Consult CONTREX, Inc. if application assistance is needed. When in doubt, do not hesitate to
put all adjustments back to the recorded settings and start over.
You may now move on to the M-Series calibration.
SK1651 Rev. 1