5.1 ADJUSTMENTPROCEDURES(Cent’ d)
Turn the INPUTADJpotentiometer for servo Po-
sition deviation adjustment on the servo drive
(14) Check movement on each axis by manual
unit so that the position gain comes within
feed.
flo% of the
target value, ‘fhedifference he-
Check that the machine tool properly follows
tween the axes should be 1%or less.
up on the movement made by handle or step
feed.
(16) Check that all NC functions are success-
Operate the machine tool by manual jog feed.
fully operable.
Activate il,s OT limit switch intentionally, . Check that reference point return ’is normally
and check to see that the machine is stopped
performed.
by detection of an overtravel alarm.
● Run the test tape on each machine for check.
Check that the machine tool follows in the
entire feedrate range in manual jog and rapid
feed.
(15) Adjust the servo system,
“ Operate the machine tool by F4-digit feed or
Coo feed in the tlDl mode. Check the servo
position deviation on the tlDI & CRTunit.
Iiith the feedrate and servo position devia-
tion, the position gain Kp is obtained by
the formula:
F
Kp= 16.7 X ~
Where, F: feedrate
(mm/min)
E:
servo position deviation(().()()1 mm)
Kp: position gain (sec. -’)
–52–
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