Rockwell Automation 9329 Drive Application Software - Manual (Page 15)

FM – Diameter Calculation
Drive Application Software – page 15 of 30
4.4.2 CalcEnblThresh_FPM
This input adjusts the minimum line speed in FPM that the diameter calculation will
be active. The diameter calculation will be disabled if the line speed is below the
CalcEnbleThresh_FPM. The diameter calculation should be disabled at low line
speed to prevent errors in the calculation.
Usage – Typically a setting of 1% to 5% of line speed will work well.
4.4.3 CalcUpdate_Rev
This input adjusts the number of roll revolutions per diameter calculation. The
calculator will measure the length of web accumulated at the set number of
revolutions. A greater number of revolutions will naturally average the roll diameter.
A lower number of revolutions will generate faster updates to the diameter calculator.
Usage – Typically set for 1 to 8 revolutions of the roll. Thicker webs ( > 62mils)
should be set lower, and thinner webs ( < 62mils) should be set higher. Using a
whole number of revolutions will help reduce diameter calculation variations due to
roll eccentricity.
4.4.4 SpeedLine_FPM
This is the line speed, translation speed, or surface speed of the roll in FPM.
Usage – Connect to the tag that represents line speed scaled in FPM. If the signal is
not available in FPM, see section 4.4 for calculating FPM.
4.4.5 SpeedMotor_Rpm
Actual speed of the driven sections motor (RPM).
Usage – Connect to the tag that is the actual motor speed (RPM) of the drive section.
4.4.6 GearRatio
The gear ratio of the machine section.
Usage – Connect to the gear ratio tag or set the value of gear ratio in the JSR
instruction.
4.4.7 DiamMinEC_in
The minimum Empty Core diameter in inches. This value is used to limit the
calculated diameter and calculate BuildUpRatio and the FPM to RPM conversion
constant. Enter the smallest diameter of roll cores to be used in the machine. If this
is a coreless machine, enter the starting diameter for the Winder.
Usage – Set for the minimum core value.
4.4.8 DiamFR_in
The Full Roll diameter in inches. This value is used to limit the calculated diameter.
If the FR diameter is a changing value and can be set, connect the tag for the value
to this input. If the FR diameter is constant or can not predicted, set the input for the
maximum used in the machine.
Usage - Connect to the Full Roll tag or set the constant value in the JSR.
tions RollRevolu
utions MotorRevol
GearRatio
=