Owner's manual

Milling Fixed Cycles
Chapter 26
26-15
5. Tap-out: The spindle and linear motion reverse to the clockwise
direction and retract to the R point.
The tap-out speed is determined by F
*
S unless you programmed D
(tap-out rpm), in which case tap-out speed is F
*
D.
At the R point, spindle rotation has ramped to zero.
6. With G98 active, the cutting tool then accelerates to the rapid feedrate
and retracts to the initial point level.
With G99 active, the cutting t ool remains at R point; no movement
occurs.
In single-block mode, the control stops axis motion after phases 1, 2, 3,
and 6 of the cycle (Figure 27.M1).
Important: When it is active, S--Curve Acc/Dec (G47.1) will be applied to
the rapid feedrate portions of the solid--tapping cycle.
The format for the G76 cycle is as follows:
G76X__Y__Z__ I__J__K__ R__F__L__;
Q__
Where : Is :
X,Y
specifieslocation ofthe hole.
Z
defines the holebottom.
QorI,J,K
defines the tool shiftamountand direction.
R
defines the Rpointlevel.
F
defines the cutting feedrate.
L
defines the numberoftimesthe millingfixedcycle isrepeated.
(See section 26.3 for a detailed description of these parameters.)
Important: The programmer or operator must start spindle rotation.
(G76): Boring Cycle,
Spindle Shift