
B–63294EN/02
2. MACHINING MENU DESCRIPTIONS
– 232 –
For an explanation of other input items, refer to ”(2) Input item description” of ”Contour pocketing
preparation.”
3) Operation description
a) Rough machining
A groove is cut by moving the tool in order from 1 to 2 to 3 to 4 to 5 to 6, as shown below:
J
123
456
d*I/100
d: Tool diameter, I: Cutting width, J: Bottom pitch
CBD
A
d/2
d/2
GBH
F
1. The tool moves by means of rapid traverse to the auxiliary approach point (point A in the figure).
2. The tool moves by means of rapid traverse to the machining start point (point B) along the X– and
Y–axes simultaneously. Cutting operations are performed along the Z–axis. Then, an arc is cut,
via auxiliary point 2 (point C), to auxiliary point 3 (point D). At this time, the arc radius is the depth
of the lateral cut (d*I/100).
3. The tool moves to point R along the Z–axis in cutting feed, then moves by means of rapid traverse
to the auxiliary approach point (point A), along the X– and Y–axes simultaneously.
4. Cutter compensation C (G41 or G42) is applied during start–up to achieve the machining start
point (point C). The offset number used is set in parameter No. 9404. The first cutting operation
is performed with the cutter compensation data set to 0. For the second and subsequent cutting
operations, the depth of lateral cut (d*I/100) is added to the cutter compensation data each time
cutting is performed.
5. At the start point of the groove (point C), cutting is performed along the Z–axis. Then, cutting is
performed up to the machining end point (point E) along the contour of the center line of the
groove, after which the tool moves to point R along the Z–axis by means of cutting feed.
6. Cutter compensation C is canceled (by using G40), after which the tool moves to the auxiliary es-
cape point (point F) by means of rapid traverse.