To calculate interruption time:
(0.937 in. + 0.250 in.) X 60,000msec/rev = 1.13msec
87.9 in. 718 rpm
Knowing the interruption time and the line speed, you can cal-
culate the amount of production deflection that must be
accommodated during cutting. To calculate the amount of
extrudate deflection between the cutter and puller, multiply
line speed by interruption time:
Blade Interruption X Line speed, X 12 = Deflection,
time, msec
fpm 60,000
in.
1.13msec X 60 fpm X 12 = .014 in.
In this example the puller and cutter must be set up to allow
for 0.014 inch of product deflection during cutting. Failure to
do this can lead to puller stoppage (which can form annular
rings on the product), and poor-quality cuts (hairs or fuzz and
angular cuts.
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