Mitsubishi Electric A800 Plus Series Function Manual page 97

Dancer feedback speed control details
Dancer tension setting example
This example assumes an air cylinder for which the dancer tension is 0 N when the input voltage is 0 V, and the dancer
tension is 20 N when the input voltage is 10 V. In the example, the setting method is described to input the analog output
signal for dancer tension control to the air cylinder so that the dancer tension becomes 10 N when the winding diameter has
the minimum value.
1
Checking the air cylinder specifications
Check the air cylinder specifications (relation between the input voltage and the tension).
It is assumed that the dancer tension is 0 N when the input voltage is 0 V, and the dancer tension is 20 N when
the input voltage is 10 V for the air cylinder in this example.
2
Finding the voltage based on the target tension setting
When the target tension value is 10 N, the input voltage is 5 V.
3
Finding the analog output signal value for dancer tension control
In order to output the voltage of 5 V through terminal AM to achieve the target tension, set the analog output
signal for dancer tension control to 50%.
Assign the analog output signal for dancer tension control to terminal AM. (Pr.158="19")
4
Setting the tension
Set the tension so that the value calibrated using Pr.426 Dancer tension setting bias and Pr.427 Dancer
tension setting gain matches the value determined in step 3.
When the Pr.426 and Pr.427 settings are initial values, set Pr.430 or input an analog value through the terminal
set in Pr.364 so that the tension setting becomes 50%.
96
DANCER FEEDBACK SPEED CONTROL
Tension (N)
20 N
10 N
0 N
0 V
5 V
Air cylinder specification
Terminal AM voltage (V)
10 V
5 V
0 V
0% 50%
100%
Analog output signal for dancer tension control
Voltage (V)
10 V
Analog output signal
for dancer tension control (%)