Chapter 5 Preparation function (canned cycle) TC-32B
2004/01/22 5 - 32 eTCOMNCPR5-1.doc
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(7) For G73, G83, G173 and G183 fixed cycles, the cutting feed after the second time will be as
below.
Cutting feed depth = Coefficient × 1st cutting feed (W)
Time of cutting 2 3 4 5 6 7 8 9 10
Coefficient 0.825 0.675 0.525 0.425 0.35 0.3 0.225 0.175 0.15
11 12 13 14
0.1 0.1 0.075 0.075
• Coefficient of 14th cutting is applied to 15th cutting and after.
•
When the cutting feed has become smaller than the V value (minimum cutting feed),
the V value is applied for cutting.
(8) For G77 and G78 fixed cycles, the cutting feed after the second time will be as below.
Cutting feed depth = Coefficient × 1st cutting feed (W)
Time of cutting 2 3 4 5 6 7 8 9 10
Coefficient 0.85 0.65 0.55 0.4 0.35 0.3 0.2 0.2 0.15
11 12 13 14
0.1 0.1 0.05 0.05
• Coefficient of 14th cutting is applied to 15th cutting and after.
•
When the cutting feed has become smaller than the V value (minimum cutting feed),
the V value is applied for cutting.
(Note 1) When switching between reducing step feed and fixed step feed, use
the W and Q commands.
(Note 2) When the W and Q commands are specified to the same block, the W
command has a priority.
(Note 3) When the W or Q command is not given, or 0 is given, cutting is carried
out once.
When the V command is not given, or 0 is given, V=0.001 (metric) or
V=0.0001(inch) is used.
5.4.18 Canned cycle cancel (G80)
The canned cycle (G73, G74, G76 to G78, G81 to 87, G89, G177, G178, G181 to G182, G185,
G186, G189) is cancelled and ordinary motion becomes effective afterwards.
The R point, Z point, and other data on drilling are all cancelled.
Command format G80 ;
(Note 1) The canned cycle is cancelled not only by G80 but also by
G00-G03. The tool change command G100 and M06 can cancel the
canned cycle after the tool change motion.
(Note 2) When the axis move command is given in the same block as G80, the
axis movement starts after the canned cycle is cancelled.