Rockwell Automation Motion Analyzer Software User Manual
Page 113
Rockwell Automation Publication MOTION-UM004B-EN-P - October 2012
113
Sizing Your System
Chapter 2
Table 66 - Input Data (label 1 in
Figure 91
)
Click Calculate to display the following values in the Results portion of the
window (label 2 in
Figure 91
).
Table 67 - Calculated Parameters (label 2 in
Figure 91
)
Parameter
Description
Center Driven
The roll is driven directly via a shaft at its center of rotation. For a Center Driven application,
Rotary Load is selected and the roll is modeled as Inertia and Torque in a Multi-segment profile.
No further load information needs be added.
Surface Driven
The roll is driven by the friction of rollers pressing onto the circumference of the web. For a
Surface Driven application, Linear Load and Belt Drive are selected and the roll is modeled as
Mass and Force in a Multi-segment profile.
You will be asked if you want to reset the Actuator parameters to zero. Click Yes, if this is the first
time you applied this Winder. If you already applied it and added the drive roll data in the Belt
Actuator, the drive roll data will be deleted.
Empty Diameter
Minimum reel diameter, when the roll is completely unwound.
Empty Inertia
Inertia of the reel when it is completely unwound.
Full Diameter
Maximum reel diameter, when the roll is completely wound.
Material Inertia
(1)
(1) Use the
on
to calculate the inertia value for your application, if the value is not readily
available.
Inertia of the reel when it is at full diameter or completely wound.
Maximum Web
Tension
Maximum allowable web tension for the material. The value is used for sizing purposes.
Minimum Web
Tension
Minimum web tension for the application. It is used to calculate the Tension Ratio.
Maximum Web
Speed
Design speed of the material running through the machine.
Acceleration Time
Shortest required acceleration time from zero to maximum web speed.
Deceleration Time
Shortest required deceleration time from maximum web speed to zero.
S-curve
Check this box if the acceleration and deceleration follow a smooth S-curve. If this box is not
checked, acceleration is considered trapezoidal.
Wind/Unwind
Select either Wind or Unwind for your application. This setting determines the direction of pull
from the web tension.
Profile Mirror
This option is used only when a Wind and Unwind axis share a DC power rail. The two axes are
first sized as normal (for example, Profile Mirror is set to Off). The Winder is then set to Profile
Mirror. This matches the two axis motion profiles as if they were connected by the web. This is
necessary only to check the system sizing. In this mode the motor winding temperature of the
Winder axis will be underestimated.
Parameter
Description
Buildup Ratio
Ratio of the Maximum/ Minimum diameter of the roll.
Inertia Range
Ratio of Maximum/Minimum inertia values. A large inertia range value is more difficult to
control.
Tension Ratio
Ratio of the Maximum/Minimum tension values.
Maximum Web
Power
Maximum web tension multiplied by the maximum web speed. This power is regenerated
continuously during unwind and should be catered for by suitably rated dump resistors or a
regenerative power supply. Motion Analyzer software underestimates this rating by
approximately 10%.
IMPORTANT
The driving roll/rolls data should be added as Drive Roll and
Idler Roll.