
B–63294EN/02
2. MACHINING MENU DESCRIPTIONS
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2.12.6.2 U–axis machining operations
(1) U–axis outer/inner/end face contouring
– Residual machining of those portions where the tool and workpiece interfere is not performed automat-
ically. If residual machining is specified in the specification of a figure, only those portions that can be
cut with the specified tools are cut; any other portions are left as is. (Automatic residual machining is
not supported.)
– Molded material air cut cancel cannot be specified.
– The override (feedrate) associated with a cut angle is fixed to 100%.
– In an initial cut, the override (depth of cut) is fixed to 100%.
– No incremental/decremental percentage can be specified for the depth of cut. (A fixed pitch is used.)
– Whether to perform semi–finish machining is automatically determined by specifying MOTION=NOR-
MAL or HIGHSPEED. (When MOTION=NORMAL, semi–finish machining is not performed. When
MOTION=HIGHSPEED, semi–finish machining is performed.)
– In finish machining, offset C is applied. Depending on the figure specified, alarm P/S 41 may be issued.
– In rough machining, NC statements are output which include a calculated virtual tool tip direction. In
finish machining, NC statements for which the tool tip center (virtual tool tip direction: No. 0) is specified
are output.
– In rough machining, a figure is produced which includes a finishing allowance (U,Z).
– The direction of cutting can be specified on a figure–by–figure basis.
(2) U–axis threading
– Constant surface speed control is disabled.
– The specifiable cutting methods are: constant amount of cut (single–edge cutting, zigzag cutting), and
constant depth of cut (single–edge cutting, zigzag cutting).
– Only general–purpose screws are supported. (Two thread figures can be specified.)
– Multiple–thread screws and reverse screws can be specified.
– Both outer and inner surfaces can be machined.
– The soft option for threading/synchronous feed is required.
– The soft option for look–ahead control cannot be specified.
(3) U–axis grooving
– Chamfering and corner R can be specified.
– Multiple grooves can be cut by specifying a pitch.
– A groove with a step can be specified.
– For an initial cut, the override (depth of cut) is fixed to 100%.
– No incremental/decremental percentage can be specified for the depth of cut. (A fixed pitch is used.)
– The outer surface, inner surface, and end face can be machined.