Mitsubishi Electric A800 Plus Series, Function Manual

Page: 56 / 242

Parameter setting procedure for dancer feedback speed control
DANCER FEEDBACK SPEED CONTROL
55
3
7
Calculation of the medium diameter gain
8
Tuning completion
Set Pr.819 back to "0" to complete the easy gain tuning.
9
Speed control integral time setting
Set "0" in Pr.821 Speed control integral time 1 .
With medium-diameter roll No medium-diameter roll
1
Tuning with the medium-diameter roll 1
Perform easy gain tuning in the same way used for the tuning
with the minimum-diameter roll.
Then, set the
Pr.820 value in Pr.642 .
Set the result of the following calculation in Pr.642 Speed control
proportional gain 2 .
2
Tuning with the medium-diameter roll 2
Perform easy gain tuning in the same way used for the tuning
with the minimum-diameter roll.
Then, set the
Pr.820 value in Pr.643 .
Set the result of the following calculation in Pr.643 Speed control
proportional gain 3 .
3
Set the diameters of the medium-diameter rolls.
Medium-diameter roll 1
Pr.639 Speed control proportional term applied diameter 1
= (Medium diameter 1 - Minimum diameter)/(Maximum diameter -
Minimum diameter) × 100 (%)
Medium-diameter roll 2
Pr.640 Speed control proportional term applied diameter 2
= (Medium diameter 2 - Minimum diameter)/(Maximum diameter -
Minimum diameter) × 100 (%)
Set "9999" (initial value) in Pr.639 and Pr.640 .
X1 = ((Maximum winding diameter - Minimum winding diameter)
×
Pr.639 /100) + Minimum winding diameter
X2 = ((Maximum winding diameter - Minimum winding diameter)
×
Pr.640 /100) + Minimum winding diameter
+
5
Pr.644 − Pr.641
Pr.642 = Pr.641
+
15
Pr.644 − Pr.641
Pr.643 = 8 Pr.641
Pr
.
1236
(Pr . 1238, Pr . 1240, Pr . 1242)
Minimum diameter
Pr
.
1235
(Pr . 1237, Pr . 1239, Pr . 1241)
Maximum diameter
Small Large Medium
Pr.644
(Proportional gain 4)
Speed control proportional
(P) gain (%)
Pr.643
(Proportional gain 3)
Pr.642
(Proportional gain 2)
Pr.641
(Proportional gain 1)
Winding diameter (mm)
X1 X2