Mitsubishi Electric A800 Plus Series Function Manual page 169

Winding diameter calculation setting
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.
Actual line speed (m/min)
Pr.1246
Winding diameter
Winding diameter
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.
Pr. Name
1249 Number of averaging for
R043 winding diameter calculation
• The filter time constant for the Pr.1249 setting is as follows.
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
NOTE
• Averaging process for winding diameter calculation is performed after limiting the maximum change for winding diameter
calculation (Pr.1247).
Winding diameter
after limiting the change
amount (Pr.1247)
168
WINDING DIAMETER COMPENSATION FUNCTION
Winding diameter calculation in progress
value held (winding diameter value being updated)
Initial value
4
Averaging
Setting range
Set the time constant of the primary delay filter
0 to 10
relative to the winding diameter calculation result.
Pr.1249≠0
Winding diameter after averaging
Pr.1249=0
Time
Winding diameter
value held
Description