Yaskawa YASNAC PC NC Programming Manual - Manual (Page 192)

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YASNAC PCNC Programming Manual Chapter 4: Enhanced Level Commands
FIGURE 4.1.4.4 Tapping Cycle with Variable 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 I at
the specified feedrate
ö Stopping the spindle
ú Starting the spindle in the reverse direction; Z-axis retraction by “d” at the specified fee-
drate
÷ Stopping the spindle
ø Repeats steps É to Ü by changing the feed distance to “I – (n – 1) J + d” until “I – (n – 1) J
£ K” is satisfied.
í If “Feed distance < K”, the value of “K + d” is taken as the feed distance and the cycle is
repeated until the Z-position level is reached.
û When the Z-point level is reached, the spindle stops.
ç Dwell is executed according to the P command.
Starting the spindle in the reverse direction; Z-axis retraction to the R-point level at the
specified feedrate.
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.
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