
B–63284EN/03
1. MACHINING PROGRAMS FOR
2–AXES (X AND Z–AXIS) LATHES
TYPES OF MACHINING
PROGRAMS
295
In rough machining of the outer surface, inner surface, and end faces of
a bar, when the machining profile has a slight difference in step as shown
below, set bit 5 (SFG) of parameter 9767 to 1 to perform normal
machining operation.
Chamfering
Corner R
Must be less than the
tool nose radius
This improvement is valid only for the rough machining of a bar.
Finish machining will result in, too much cutting in tool nose radius
compensation, causing P/S alarm 41. When bit 3 (NCR) of parameter
9767 is set to 1 to disable the use of G41/G42, however, the alarm will
not be issued.
In this case, because G41/G42 is not used for finish machining, the
finished figure may be slightly inaccurate. To resolve this problem,
set bit 3 (NCR) of parameter 9767 to 0 and use a tool having smaller
tool nose radius.
Remark)
Machining is not always performed normally, however, for a figure
which is slightly different in level, as in the following example.
For such a figure, machining can be performed normally by adding the
procedure used to machine corner R for a part having an acute angle
.
corner R for a part having an acute angle
Horizontal line
Horizontal line
Arc
1.1.13
Improving the
Machining of Figures
that Differ Slightly in
Step