HEIDENHAIN ND 287 User Manual - Manual (Page 53)

ND 287
53
I – 5 Ser
ies of measur
ements and statistical
pr
ocess
c
ontr
ol Tolerances
In the TOLERANCES form, you define the tolerance limits for
statistical process control:

In the SPC SETUP submenu, select TOLERANCES and press the
ENTER key to open the form.
 The currently selected part (P0-P9) is displayed at the upper right.
You can also change the tolerances for the selected part in the
SELECT PART form that is opened by pressing the PART
TOLERANCE soft key on the standard screen.
 Use the numeric keys to enter the values for the lower tolerance
limit, the nominal value and the upper tolerance limit
in the
LOWER LIMIT, NOMINAL VALUE and UPPER LIMIT fields. The
values for the lower and upper tolerance limits correspond to the
values for the lower and upper sorting limits. This means that the
ND activates pins 17 or 18 at D-sub connection X41 if the limits are
violated (see "Sorting and tolerance checking" on page 58).
 Press the RED, GREEN/[DISPL.BLUE] soft key to select whether
the display value changes to the same color as the sorting symbols.
Blue is the default setting for the color of the display value (see
"Sorting and tolerance checking" on page 58).
If you edit the values entered, the ND displays a warning.
In order to save the changes, the ND must clear the
data stored in the FIFO memory.
Press the ENTER key
to confirm, or press the C key to cancel.
Fig. I.58 Tolerances
Please note that the LOWER LIMIT must be less than the
NOMINAL VALUE and the UPPER LIMIT, and the UPPER
LIMIT must be greater than the NOMINAL VALUE.