Force Displays - cont.
20
3
C2H 118*125*132
4
C2T 065*125*185
C1H *125*
9
C1 M 120*128*136
Press 3. The display will now show
“C2H 118*125*132”. This is the “High
Count” sample for Channel 2 (“C2H”)
and it is an average of sixty four (64)
measurements. The middle number is
very steady so the limits can be very
close to it.
Press 4. The display will show “C2T
065*125*185”. This is the “Trend”
display for channel 2 (“C2T”) and it
shows how far the force can slowly
change before it is stopped.
If any of these limits have been disabled
by special programming, the display
will show the measurement without any
limits, for instance: “C1H *125*
”.
Press 9. The display will show “C1 M
120*128*136”. The upper and lower
limits show the highest high and the
lowest low in the last 64 strokes. This
is used to determine the correct
tolerance setting.
Press Display Will Show
If
any of these limits have been disabled, no
limits will be shown, only the measurement:
Each of these measurement levels is sensitive to certain kinds of problems. The single blow
limits can catch a smashup in one stroke, but may not be sensitive enough to notice a tool chip
because the force measurement varies too much. The High Count limits will not stop a smashup
quickly enough, but may notice a small chip and stop the machine after a few dozen have been
made. The Trend program can catch tool wear and other gradual changes. Remember that all of
these limits are working all the time; the force display only controls which one is being displayed
at that moment.
Another useful force function is the *. Typically IMPAX multiplies the force measurements by
a scale factor. If you wish to see the actual measurements instead of the scaled numbers, press
the * button while looking at the force display. The display will change to show actual sensor
measurements, on the scale from 0 to 65000. This is useful for comparing force displays to error
messages, which always show unscaled, actual measurements. To change the display back to
scaled numbers, press the * button again.
Note for roll-forming controllers: IMPAX controllers applied to rolling machine monitor forces
exactly as described above, except that there are only two channels, one for the forward rolling
stroke and one for the backstroke. Since no part should roll back through the die, there is never a
minimum limit on backstroke force.
To Next Page
Loading...