TC-32B Chapter 5 Preparation function (canned cycle)
2004/01/22 5 - 11 eTCOMNCPR5-1.doc
5
5.4.4 Tapping cycle (G77)
I_
Command format G77 X _ Y _ Z _ R _ Q _ S _ ;
J_
eNCPR5.08.ai
• The relief amount d is set by the parameter 1.
•
If the minus value is commanded for the cutting amount Q, the algebraic mark (-) is ignored.
•
When a temporary stop is applied on the way from the R point to the Z point or the R point,
the tool stops after returning to the R point.
•
A thread pitch or number of threads should be specified.
•
Set the data on a thread pitch following the address I, and the data on a number of threads
following the address J.
•
If the address S exceeds the max, spindle speed in tapping, an alarm is generated.
rapid feed
cutting feed
spindle CW
spindle CCW
R point
Z point
Q
Q
d
d
Return
Spindle stop
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