4)
POSITION LOOP OFFSET AND DROOP ADJUSTMENTS
l
Item
Adjustment
Remarks
Dffset
1 Display screen 5 with ALARM/DIAGNOSIS
adjust-
control at NC side.
.;
(With
MQ)
aent
2 Check that NC READY signal appears.
3 Adjust VR7 on AC transistor ampli-
fier and set POSITION DROOP to +/-2.
Droop
1 Display screen 5 with ALARM/DIAGNOSIS
adjust-
control at NC side.
ment
2 Check that detector being used and
name of detector on screen tally.
3 Check that TAU and LINEAR ZONE are
correct.
4 Calculate position droop from formula
below:
Feedrate
(mm/min)
x 1
x
2
60
gain
Feedrate
is
Fl000
(approx. 100 rpm
motor speed)
5 Feed axis 1 so that position droop is
Remember that
made
(+)
and use VR2 on AC transistor
this differs
amplifier to adjust to position droop
from machine's
in
(4).
(+)(-I
direc-
tions.
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