Mitsubishi Electric A800 Plus Series Function Manual page 96

• When the dancer tension setting is input using analog input, the input value can be filtered using Pr.74 Input filter time
constant, Pr.826 Torque setting filter 1, and Pr.836 Torque setting filter 2.
NOTE
• The dancer tension setting input is clamped at 100%.
Dancer tension setting adjustment (Pr.426, Pr.427)
• Use Pr.426 Dancer tension setting and Pr.427 Dancer tension setting input selection to calibrate the dancer tension
setting (Pr.430 Dancer tension setting bias setting or input value through terminal set in Pr.364 Dancer tension setting
gain).
• Use Pr.426 to set the value when the dancer tension setting is 0%, and use Pr.427 to set the value when the dancer
tension setting is 100%.
Taper function (Pr.1284 to Pr.1297)
• By setting the dancer tension, taper ratio, and winding diameter at taper start, the analog output signal for dancer tension
control can be calculated based on the winding diameter determined by winding diameter calculation.
• The following example shows the relation between the winding diameter and analog output signal for dancer tension
control when Pr.1284 Taper mode selection = "1" (taper mode selection: linear taper profile)
Dancer tension setting
(after calibration)
Taper ratio setting
• For the details of the operation using taper function, refer to the description of taper function for tension sensorless torque
control. (Refer to page 124.)
The differences from the taper function for tension sensorless torque control are as follows.
Function
Taper function for analog output
signal for dancer tension control
Taper function for tension sensorless
torque control
Dancer tension setting (%)
Pr.427
(Dancer tension setting gain)
Pr.426
(Dancer tension setting bias)
0%
For dancer tension control
Analog output signal (%)
Dancer tension setting
for taper control
Minimum Pr.1286
winding diameter (Winding diameter
at taper start)
Input
Dancer tension setting
(Pr.430, or analog input according to Pr.364)
Tension command
(Tension command according to Pr.804)
Dancer feedback speed control details
Pr.430 setting
or analog input
100%
Taper ratio setting
(Pr.1287 or analog terminal input)
Taper ratio = 100%
Winding diameter
Maximum
winding diameter
Analog output signal for dancer tension control
Taper control tension command F
DANCER FEEDBACK SPEED CONTROL
Output
TP
95
3