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Hurco FET Servo Amplifier Tuning procedure
Mills using
Hurco "FET" Servo Amplifier. (Part No. 415-0157)
Tool Requirements:
a. Voltmeter
b. Small Screwdriver
Move the current limit switch on the logic board down to the 5 -
ampere position, turn the (RESPONSE) control clockwise until the
motor oscillates. Then turn the (RESPONSE) control
counterclockwise until the oscillation stops. After motor
oscillation stops, turn the (RESPONSE) control approximately
five more turns counterclockwise.
Move the current limit switch back up to its normal position.
Connect a DVM across the DAC command signal. On Servo Control
Board, Connectors J2 (X), J3 (Y), and J4 (Z), Connect meter to
Pins 8 and 9 for axis to be adjusted.
With the servos on, adjust the (BALANCE) to produce a zero
reading on the DVM (+/- 0.009 vdc). Leave the DVM connected
across the DAC signal to adjust the (SIGNAL) control:
(B control) - with the axis running at a feed rate of
25 IPM, adjust the (SIGNAL) control to produce a .9 vdc
(+/- 10%) reading on the DVM.
(BX control) - with the axis running at a feed rate of
25 IPM, adjust the (SIGNAL) control to produce a .65 vdc
(+/- 10%) reading on the DVM.
(Max 1 Control) - with the axis running at a feed rate of
40 IPM, adjust the (SIGNAL) control to produce a .9
vdc (+/- 10%) reading on the DVM.
Tool Calibrate, Table Zero. Ensure the screen axis reading is
0.0000 (+/- .0001).
Ensure all axes will run in rapid traverse over its full travel
in the plus and minus direction.
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