Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 657)

Milling Fixed Cycles
Chapter 26
26-25
When the single block function is active, the control stops axis motion
after steps 1, 2 and 6.
If the operator activates a feedhold during steps 3, 4 or 5, axis motion
stops after step 7. Axis motion will also stop during steps 1, 2, and 7.
However, if the operator activates a feedhold during step 7, axis motion
will stop immediately.
Important: Your system installer can enable a tap retract feature for this
cycle through PAL. Tap retract enables you to retract the tapping tool and
resume the cycle, or completely abort the tapping operation. Refer to your
system installers documentation for details.
Use this cycle to cut right-handed threads.
The format for the G84.1 cycle is:
G84.1X__Z__R__F__L__Q__D__S__;
Where : Is :
X specifies location of the hole.
Z defines the hole bottom.
R defines the R point level.
F represents the thread lead along the drilling axis (Z in this manual). It is
mandatory and modal in any subsequent solid tapping cycle blocks until a new
F-word is programmed.
The control interprets the F-word as the thread lead in inches per revolution or
millimeters per revolution, depending on the inch/metric mode active.
L defines the number of times the drilling cycle is repeated.
Q defines the angle at which to orient the spindle before starting the tap. It is modal
in any subsequent solid tapping blocks until a new Q-word is programmed or the
tapping cycle is cancelled by a G80. To retap a hole, a Q-word must have been
programmed when the hole was originally tapped.
D defines the return spindle speed, but cannot exceed the maximum tapping
spindle speed set in AMP. This will adjust your Z-axis feedrate according to the
thread lead defined in F.
S defines spindle speed in rpm.
See section 26.3 for a detailed description of these parameters.
Important: When programming and executing a G84.1 solid tapping
cycle, remember:
the feedrate of the tapping phases is derived as
(spindle {RPM}
*
F-lead {IPR}) = IPM
(G84.1): Right-Hand
Solid-Tapping Cycle