Chapter 5 Preparation function (canned cycle) TC-32B
2004/01/22 5 - 12 eTCOMNCPR5-1.doc
5
5.4.5 Reverse tapping cycle (synchro mode) (G78)
I_
Command format G78 X _ Y _ Z _ R _ Q _ S _ ;
J_
•
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”
•
When I and J commanded the same block, movement follow the “I” command value.
•
If the address S exceeds the max, spindle speed in tapping, an alarm is generated.
R point
Z point
Q
Q
d
d
Return
Spindle stop
rapid feed
cutting feed
spindle CW
spindle CCW
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