FANUC Series 16/18/160/180-Model C for Lathe Operator Manual

PROGRAMMING
14. FUNCTIONS TO SIMPLIFY
PROGRAMMING
B–62754EN/01
162
NOTE
1 While the values i and k, or u and w are specified by
address U and W respectively, the meanings of them are
determined by the presence of addresses P and Q in G73
block. When P and Q are not specified in a same block,
addresses U and W indicates i and k respectively. When
P and Q are specified in a same block, addreses U and W
indicates u and w respectively.
2 The cycle machining is performed by G73 command with P
and Q specification.
The four cutting patterns are considered. Take care of the
sign of u, w, k, and i.
When the machining cycle is terminated, the tool returns to
point A.
After rough cutting by G71, G72 or G73, the following command permits
finishing.
G70P (ns) Q (nf) ;
(ns) : Sequence number of the first block for the program of
finishing shape.
(nf) : Sequence number of the last block for the program of
finishing shape.
NOTE
1 F, S, and T functions specified in the block G71, G72, G73
are not effective but those specified between sequence
numbers “ns” and “nf” are effective in G70.
2 When the cycle machining by G70 is terminated, the tool is
returned to the start point and the next block is read.
3 In blocks between “ns” and “nf” referred in G70 through
G73, the subprogram cannot be called.
14.2.4
Finishing Cycle (G70)
Format

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