Envelope Monitoring (force)
Adjusting monitoring accuracy
Sensitivity and Tolerance
The accuracy or precision of the enveloping technique typically is set automatically by the SK unit
to match the stability and repeatability of each curve segment. Thus, it is not necessary to fine tune
this any further through manual adjustments, however, the SK does provide the possibility to alter
within a certain range the settings for “Sensitivity” and “Tolerance” individually for each connected
channel.
Sensitivity (S) can be adjusted in steps from 1 - 9 (1=coarse, 9=fine). The sensitivity setting has
an effect on the basic width of the envelope which is the distance between upper and lower
envelope curve. A coarse setting (= low sensitivity numbers) widens the gap between upper and
lower threshold, while a fine setting (= high sensitivity numbers) narrows the gap down which
represents a more precise control. Setting the sensitivity to “0” switches the monitoring off for this
channel (no more envelope curves are being displayed).
The optional SKProfilemaster software (see page 27) provides a segmented envelope profile
around the force curves (tight where needed; loose where necessary).
The Tolerance (Tol) setting determines how many consecutive “bad” parts with force signals
outside the envelope are ignored or “tolerated” before the machine is stopped. Therefore, the
tolerance setting prevents undesired machine stoppages caused by random or erratic force errors.
Tolerance can be set to values from 0 - 9 with the following meanings:
0: No “bad” parts are tolerated. The first “out-of-limit” part will stop the machine.
1: One “bad” part is tolerated. If it is followed by another “bad” one, the machine stops..
9: 8 consecutive “out-of-limit” parts will be tolerated. The 9th “bad” part stops the machine.
NOTE: Use of tolerances should be scrutinized carefully. Remember, an input essentially bypasses
the machine for the number of tolerances entered. Serious damage to tooling could result if this
feature is improperly used.
How to alter S and Tol:
Select sensor chanel and touch the desired field S or Tol;
enter desired value and confirm by E
Example:
Adjusting of S (sensitivity)
Touch desired
sensitivity
Confirm
by E
SK 7
V5.2 E 10/04
SK7-09
