3 G/M Codes
3 - 45
Details:
(1) N(ns)~N(nf) specify the machining path of A1~B.
(2) A maximum of 50 blocks can be inserted from N(ns) to N(nf).
(3) No subprogram is available from N(ns) to N(nf).
(4) No assignment of positioning commands on Z-axis is allowed from A to A1.
(5) The feed-rate from A to A1 is either G00 or G01.
(6) The X and Z tool path from A1 to B must be incremental or decremental.
(7) The cutting depth U( d) and retraction amount of rough cut R(e) are modal codes.
They remain valid until another value is specified.
(8) G71 is applicable to the following four cutting types. They are all parallel to the
Z-axis. Whether U and W are positive or negative (Fig. 3-34) is determined by the
direction of tool path.
Fig. 3-34 G71 Rough Cut Canned Cycle
U+,W +
B
A
A
X
Z
U+,W -
B
A
A
U-W +
B
A
A
U-W -
B
A
A
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