3 G/M Codes
3 - 43
1. Finishing Cycle, G70
Functions and Purposes:
After a work-piece undergoes rough cut with G71, G72 or G73, G70 is used for fine cut
of the work-piece to ensure its precision.
Format:
G70 P(ns)____ Q(nf)____
P(ns) : The number of the first block for a fine cut cycle.
Q(nf) : The number of the last block for a fine cut cycle.
Details:
(1) The F, S, and T functions of G71, G72, G73 and previous blocks are applicable to
G70. wherer F, S, or T is changed in the blocked from P(ns) to Q(nf), the changed
values praveil.
(2) When G70 is executed, the tool returns to the start point and reads the next block.
2. Longitudinal Rough Cutting Cycle, G71
Format:
G71 U( d)____ R(e)____
G71 P(ns)____ Q(nf)____ U( u)____ W( w)____ F(f)____ S(s)____ T(t)____
N(ns)
N(nf)
G00 X__ Z__ ;Tool move back
Txxxx ;Change tool (fine cutting)
G00 X__ Z__ ;Move to the start position of Canned Cycle
G70 P(ns) Q(nf) ;Fine cutting
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