Red Lion C48C - Manual (Page 43)

Slow Down & Cut to Length with Total Yardage
To improve production efficiency, a wallpaper manufacturing plant is
installing cut to length counters on the roll form machines. Currently, electro-
mechanical counters are used for length measurements. The operator slows the
machine down upon arriving at the desired length, stops and then cuts. The
addition of the C48CB batch counters eliminates the operator’s manual
observation and control.
The operator programs the required cut length as Preset 2. Preset 1 is
preprogrammed for tracking and will automatically follow Preset 2. Preset 1 is
used as the slow down, and is set for a value 0.25 yards less than Preset 2. The
process count is programmed to automatically reset at the Preset 2 cut length of
11.00 yards, and begin counting for the next roll. Counter 2 is programmed as a
totalizer and is recorded and reset (via key switch)
at the end of the operator’s shift. The C48CB
was ordered with the RS-485 serial
communication option. Future
plans
include a data
acquisition program to
interrogate
the
C48CB’s. A 100 ppr
rotary
pulse
generator is shaft
coupled to a 4” pinch
roller
for length
measurement. Display
units desired is 0.01 yards.
Program Security features are set
to allow access to Preset 2 only. This
allows the operator to change the required
cut length, but prevents accidental changes to
other programming parameters that may adversely
affect process operation. After all programming is
complete, the Program Disable DIP switch is moved to the
up position to enable the Program Security function.
Circumference of pinch roller:
circumference =
π x diameter
12.56636 = 3.14159 x 4.00
Pulses per yard:
36 inches X 1 rev = 2.8647913 rev/yard
1 yard 12.56636
Prescaler:
Prescaler = Display Units
number of pulses
Prescaler = 100
286.47913
Prescaler = 0.34907
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APPENDIX “A” - APPLICATION EXAMPLE