Winding diameter calculation setting
168
WINDING DIAMETER COMPENSATION FUNCTION
Line speed at winding diameter calculated value activation during
tension sensorless / tension sensor feedback torque control
• During tension sensorless / tension sensor feedback torque control, when the actual line speed is equal to or higher than
Pr.1246 Line speed at winding diameter calculated value activation
, winding diameter calculation is performed, and the
winding diameter calculation result is updated. When the actual line speed is lower than the
Pr.1246
setting, winding
diameter calculation is not performed and the last winding diameter value is kept.
• It is possible to prevent the change in the winding diameter, which may be caused by calculation errors at low-speed
operation.
NOTE
• In the thickness method, the actual line speed is not used for calculating the winding diameter. However, both in the actual
line speed method and the thickness method, the actual line speed is used for determining whether winding diameter
calculation is performed.
• If the actual line speed is not input, setting
Pr.362
= "0" (select V* (line speed command) as the actual speed input) enables
the use of V* as a reference to determine whether winding diameter calculation is performed.
8.2.6
Averaging process for winding diameter
calculation
Set the time constant of the primary delay filter relative to the winding diameter calculation result.
• The filter time constant for the
Pr.1249
setting is as follows.
NOTE
• Averaging process for winding diameter calculation is performed after limiting the maximum change for winding diameter
calculation (
Pr.1247
).
Pr.
Name
Initial value
Setting range
Description
1249
R043
Number of averaging for
winding diameter calculation
4
0 to 10
Set the time constant of the primary delay filter
relative to the winding diameter calculation result.
Pr.1249 setting
Filter time constant
0
Without filter
1
0.02 s
2
0.04 s
3
0.08 s
4 (initial value)
0.16 s
5
0.32 s
6
0.64 s
7
1.28 s
8
2.56 s
9
5.12 s
10
10.24 s
Winding diameter
Pr.1246
Winding diameter
value held
Winding diameter
value held
Winding diameter calculation in progress
(winding diameter value being updated)
Actual line speed (m/min)
Time
Winding diameter
after limiting the change
amount (
Pr.1247
)
Averaging
Pr.1249
≠0
Pr.1249
=0
Winding diameter after averaging
Summary of Contents for A800 Plus Series
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