3 G/M Codes
3 - 59
Parameters:
m : Fine cut times (2-digit, 01~99)
If not defined, parameter "G76 Fine Cut Times" is used.
r : Chamfering settings (2 digits)
Length of chamfering = 0.1 × chamfering settings (r) × thread pitch. If not
defined, the parameter "Chamfering Settings" is used.
a : Tool-tip angle (0°-90°).
The available angles are 0°, 5°,10°,15°,…to 90°. If not defined, the
parameter "Tool-tip Angle" is used.
m, r, and a are defined simultaneously by the command code P.
For m=2, r=12, a=60
°
, then the command is G76 P021260.
Q( d min): Minimum cutting amount (integer m
)
When the cutting amount of the nth cutting ( d n - d n-1)
< d min, the cutting will resume with d min as the minimum cutting
amount. If no minimum cutting amount is defined, the parameter
"Minimum Cutting Depth" is used.
R(d) : Amount of material to be removed for the fine cut
If not defined, the parameter " Reserved Thread Depth" is used.
X, Z : Absolute coordinates of cutting end point (D).
U, W : Incremental coordinates of the cutting end point ( D).
R(i) : Radius difference of thread part (i=0 indicates normal linear thread
cutting).
P(k) : Thread height (radius programming on X-axis, unit: integer m)
Q( d) : First cutting depth (radius programming, unit: integer m)
F(l) : Thread pitch, (same as G32)
E : Number of threads per inch; range: 1.0-100.0. This setting shall not
appear when an F setting is given.
Details: ( Fig 3-45 Fig 3-46 )
(1) What must be noted is that length of the path DE (U/2) must be greater than the
length of the chamfer.
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