SSD Drives 690+ Series - Set-Up with no Web Connected to the Winder; Equations; Simple Centre Winder Equations

Application Notes 10-7
690+ Series AC Drive
Set-up with no Web connected to the Winder
The majority of the drive set-up should be performed without web connected to the centre
winder. This allows the winding spindle to rotate freely, without being restrained by the web.
Before configuring the Closed Loop centre winder load the Winder macro, refer to the Software
Product Manual, Chapter 5: “Application Macros”.
DIAMETER CALC Function Block
Set the MINIMUM DIAMETER parameter with the drive stopped.
This value can be calculated, knowing the absolute maximum and minimum roll diameters and
applying the equation:
Min Diameter =
Smallest core diameter
Maximum roll diameter
100%u
It is important that the absolute maximum range of diameter is used when calculating the
minimum diameter parameter.
Commission the Drive Control Loops
Since the winder blocks are equally applicable for Unwind and Rewind applications the
following convention for the sign of the various set points and the direction of rotation, is
useful:
Rewind
Motor
Forward line
direction
Positive setpoint
and rotation
Positive
torque
Unwind
Motor
Forward line
direction
Positive setpoint
and rotation
Positive
torque
All directions are shown overwinding, with
OVERWIND set TRUE
Figure 10-5 Conventions
Equations
The following equations are used to determine motor torque and power requirements.
Simple Centre Winder Equations
It is assumed that the winders operate in constant tension mode.
Rewind
Motor
Speed
Torque
Unwind
Motor
Speed
Torque
Line Reference
Belt /
Gearbox
Belt /
Gearbox
Tension Tension
Figure 10-6 Constant Tension Winder