Cleveland Motion Controls Quantum Tension Controller REV A - Manual (Page 29)

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5.0 Menu PID
5.5 Motor
This menu is available in motor command configuration.
Tension control for motorized rewinder in speed regulation.
In this case, we need linear speed (tacho) and diameter information to calculate the rotation
speed of the motor.
Motor gain is then the coefficient linking the different parameters:
Motor gain calculation:
Parameters :
10v on diameter input = D ( m )
10v on tacho input = Vl (m/min)
10v on output AO1 = speed set point for the drive = Vr (rpm)
Calculation : Motor gain = Pi x D x Vr
Vl
With this rotation speed calculation, we have an open loop system on the speed control.
To control the tension on the product, the DGT regulates the open loop calculation with a
closed loop (PID adjustement) on tension measurement.
For this application, Coefficient motor = 100%
Note : In this configuration, Overspeed = 0.
Special case: Tension control through clutch and speed follower on rewinder
This model is done to solve dissipation problem in clutch on the rewinding side.
The goal is to drive tension on the product with the clutch and drive the motor speed to keep
low slipping in the clutch.
AO1 input : dedicated to clutch control (PID regulation with tension control).
AO2 input :dedicated to motor speed control. The DGT calculates the rotation speed with linear
speed and diameter information. Motor gain is calculated like here above.
To ensure a minimum slipping for the right working of the clutch, it is necessary to add an
overspeed constant (usually equivalent to 60rpm).
Overspeed calculation:
Parameter :
10v on AO2 output = speed set point for the drive = Vr (rpm)
Calculation : overspeed = 60(rpm) * 10(V) (de 0.0Và 10.0V)
Vr (rpm)
For this application, Coefficient motor = 0% (generate automatically AO2 as speed output).
Important note: If motor gain =0, motor configuration is not validated and settings are
memorized as closed loop configuration.