Yaskawa YASNAC PC NC Programming Manual - Manual (Page 186)

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YASNAC PCNC Programming Manual Chapter 4: Enhanced Level Commands
FIGURE 4.1.4.1 Tapping Cycle with Fixed Pitch Command
Operation (G184 mode)
€ Positioning at the hole position specified by X, Y
ó Positioning at the R-point level
ì Starting the spindle in the forward direction; Z-axis feed by the distance specified by Q at
the specified feedrate
ö Stopping the spindle
ú Starting the spindle in the reverse direction; Z-axis retraction to the R-point level at the
specified feedrate
÷ Stopping the spindle
ø Repeats steps É to Ü by changing tapping feed distance to “Q x n“.
í When the Z-point level is reached, the spindle stops and dwell is executed (if a P com-
mand is specified).
û Starting the spindle in the reverse direction; Z-axis retraction to the R-point level at the
specified feedrate
ç In the G98 mode: Positioning at the initial point level
In the G98 mode with a W command: Positioning at the W-point level
In the G99 mode: Cycle completes at the R-point level.