23
Gain adjustment in actual operation
Continued from the last page.
Medium diameter roll is
available.
Medium diameter roll is not
available.
Adjustment at medium diameter roll 1
Increase
Pr. 820 Speed control P gain 1
by 10% increments, and
adjust the gain to "the setting before vibration/noise is produced"
"0.8 to 0.9" throughout minimum speed to maximum speed.
Make a memo of the setting (C) in
Pr. 820 Speed control P gain 1
at
this time.
Obtain the setting(C) for
Pr. 778
from the formula below.
Adjustment at medium diameter roll 2
Increase
Pr. 820 Speed control P gain 1
by 10% increments, and
adjust the gain to "the value of setting before vibration/noise is
produced"
"0.8 to 0.9" throughout minimum speed to maximum
speed.
Make a memo of the setting (D) in
Pr. 820 Speed control P gain 1
at
this time.
Obtain the setting(D) for
Pr. 779
from the formula below.
Set medium diameters.
Medium diameter roll 1
Pr. 775 Speed control proportion term applied diameter 1
= (Medium diameter roll 1 - minimum diameter)
/(Maximum diameter - minimum diameter)
100 (%)
Medium diameter roll 2
Pr. 776 Speed control proportion term applied diameter 2
= (Medium diameter roll 2 - minimum diameter)
/(Maximum diameter - minimum diameter)
100 (%)
Refer to the memos you made, and set "A" to
Pr. 777 Speed control
proportional gain 1
, "C" to
Pr. 778 Speed control proportional gain 2
,
"D" to
Pr. 779 Speed control proportional gain 3
, and "B" to
Pr. 780
Speed control proportional gain 4
.
Calculation to obtain
Pr. 778 and Pr. 779
Speed control P/I gain adjustment
completed
Continue to dancer control PID gain
adjustment (
)
Pr. 780
Pr. 779
Pr. 778
Pr. 777
Min. diameter
Max. diameter
X
1
X
2
Pr. 778
=
/5 +
Pr. 777
Pr.779
= 8
/15 +
Pr. 777
However,
=
Pr. 780
-
Pr. 777
