TOMATECH AUTOMATION
compared to A. Δw＞0,it is the offset of the last X positive roughing path compared to
finishing path. The system defaults Δw=0 when W(Δw) is not input, i.e. there is no Z
finishing allowance for roughing cycle.
F: Feedrate; S: Spindle speed; T: Tool number, tool offset number.
M, S, T, F: They can be specified in the first G73 or the second ones or program ns～nf. M,
S,T, F functions of M, S, T, F blocks are invalid in G73, and they are valid in G70 finishing
blocks.
Execution process: (Fig. 3-31)
① A→A1: Rapid traverse;
② First roughing A1→B1→C1 :
A1→B1: Rapid traverse speed in ns block in G0, cutting feedrate specified by G73 in ns
block in G1;
B1→C1: Cutting feed.
③ C1→A2: Rapid traverse.
④ Second roughing A2→B2→C2 :
A2→B2: Rapid traverse speed in ns block in G0, cutting feedrate specified by G73 in ns
block in G1;B2→C2: Cutting feed.
⑤ C2→A3: Rapid traverse:
…………
No. n times roughing, An→Bn→Cn :
An→Bn: ns Rapid traverse speed in ns block in G0, cutting feedrate specified by G73 in ns
block in G1;
Bn→Cn: Cutting feed.
Cn→An+1: Rapid traverse;
…………
Last roughing, Ad→Bd→Cd :
Ad→Bd: Rapid traverse speed in ns block in G0, cutting feedrate specified by G73 in ns
block in G1;
Bd→Cd: Cutting feed.
Cd→A: Rapid traverse to starting point;
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