HEIDENHAIN PT 880 - Manual (Page 101)

POSITIP 880 101
I – 9 POSITIP 880 T
u
rn
ing F
unctions
Radius/Diameter Display
Drawings for lathe parts usually give diameter values. POSITIP 880
can display either the radius or the diameter for you. When the
diameter is being displayed, the diameter symbol (Ø) is shown next to
the position value. See Fig. I.78.
Example: Radius display, position 1 X = 20 mm
Diameter display, position 1 X = 40 Ø mm
Oversizes
Oversizes are entered in the JOB SETUP menu. Oversizes are
automatically taken into account in the DISTANCE-TO-GO mode. When
the displayed distance-to-go is 0, only the oversize amount remains.
When you have set the OVERSIZE field to ON, a symbol for oversize
appears on the right side of the axis bar. See Fig. I.79.
Oversize symbol:
Entry sizes for oversize and undersize
Oversize: Positive entry value (up to 999.999 mm).
Undersize: Negative entry value (down to -999.99mm).
Entering oversizes
8 Cursor to OVERSIZE and press ENT.
8 To enter value either press ON soft key or simply begin entering the
desired value for that axis. Press ENT to advance to the next axis
field.
8 To work without oversizes, either press the OFF soft key for each
axis field or enter 0 for each field.
8 Press USE, then USE NEW SETTINGS.
Fig. I.78 Workpiece for radius/diameter display
Fig. I.79 OVERSIZE form