User manual

12 Functions and operations in the tension control mode
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Step 4 Performing the tension controlled operation
1.
Set the tension command value.
Analog setting: Set a desired value using the internal/external potentiometer or external DC voltage.
Digital setting: Set a desired operation data number based on a combination of ON/OFF statuses of M0
to M2 inputs.
2.
Turn the CW input or CCW input ON.
Tension controlled operation starts according to the speed command value set in step 1.
Note
Operation data numbers cannot be changed when the CW input or CCW input is ON.
3.
Turn the CW input or CCW input OFF.
Motor excitation turns off and the motor performs the free-run stop.
Refer to p.116 for details on the timing chart.
12.5 Tension control operation (high function mode I, high function
mode II)
Follow the steps below to perform a tension controlled operation:
Step 1 Calculating the tension command value
Step 2 Setting the tension command value
Step 3 Setting the initial diameter, material thickness and final diameter
Step 4 Setting the material inertial moment and core inertial moment (high function mode II only)
Step 5 Setting the taper
Step 6 Performing the tension controlled operation
Step 7 Setting the parameters
Step 1 Calculating the tension command value
Calculate the required motor torque based on the tension and maximum diameter needed for your equipment,
by using the formula below:
Required motor torque [N·m] = Tension [N] × Maximum diameter [m] / 2
Based on the calculated required motor torque, calculate the tension command value by using the formula
below:
Tension command value [%] = × 100
Required motor torque [N·m]
Rated motor torque [N·m]
Example: When the tension is 0.32 N, maximum diameter is 1 m (3.3 ft.) and applicable
motor is NX620AA-1 (rated torque: 0.64 N·m)
1 [m]
2
Required motor torque [N·m] = 0.32 [N] × = 0.16 [N·m]
0.16 [N·m]
0.64 [N·m]
× 100 = 25 [%]
Tension command value [%] =
Example: When the winding diameter is 1000 mm (39.37 in.)
Motor output
Tension command
value [%]
Torque [N·m] Tension [N]
100 0.64 1.27
80 0.51 1.02
60 0.38 0.76
40 0.25 0.51
20 0.13 0.25
0 0 0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0 50% 100%
Tension command [%]
Tension [N]