Programming manual.
CNC 8070
10.
ELECTRONIC THREADING AND RIGID TAPPING.
Rigid tapping (G63)
·190·
(REF: 1709)
Considerations for the execution
Spindle speed behavior
Threading is carried out a the speed defined with function G63. If no particular threading
speed is defined, threading will be executed at the speed active at the time. If a speed is
programmed with function G63, it will be the active spindle speed at the end of the threading
operation.
The spindle turning direction is determined by the sign of the programmed "S" speed ignoring
the active M3, M4, M5 or M19 functions. Programming any of these functions will cancel G63.
Feedrate behavior
While rigid tapping, the feedrate may be varied between 0% and 200% using the feedrate
override switch on the CNC's operator panel of via PLC. The CNC will adapt the spindle
speed in order to keep the interpolation between the axis and the spindle.
Rigid tapping and tool inspection mode
When interrupting the rigid tapping and accessing the tool inspection mode, it is possible to
jog the axes (only in jog mode) that are involved in threading. When moving the axis, the
interpolated spindle will also move; the spindle used to make the thread. If several axes are
involved in the rigid tapping, when moving one of the axes all the axes involved in the thread
will also move with it.
This way, the axis may be moved into or out of the thread as often as desired until the
repositioning softkey is pressed. The axes move at the programmed F except when an axis
or spindle exceeds its maximum feedrate allowed (parameter MAXMANFEED), in which case,
the feedrate will be limited to that value.
The spindle jogging keys are disabled during tool inspection. It is only possible to get out
of the thread by jogging one of the axes involved in rigid tapping. Functions M3, M4, M5 and
M19 cannot be programmed at the spindle either; these functions are ignored.
During repositioning, selecting one of the axes of the thread on the softkey menu will move
all the axes and the spindle involved in the thread.
Properties of the functions
Function G63 is modal and incompatible with G00, G01, G02, G03 and G33.
On power-up, after an M02 or M30 and after an EMERGENCY or a RESET, the CNC
assumes function G00 or G01 as set by the machine manufacturer [G.M.P. "IMOVE"].
G63 Z0 S-150
M19 S240 (Third entry at 240º)
G63 Z-50 S150
G63 Z0 S-150
...
3-entry thread, 50mm deep and 1mm pitch.
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