Yaskawa YASNAC PC NC Programming Manual - Manual (Page 183)

4 - 46
YASNAC PCNC Programming Manual Chapter 4: Enhanced Level Commands
4.1.4 Deep-hole Solid Tap Function (G184, G174)*
When carrying out large-diameter hole tapping or deep-hole tapping operation, it is difficult to
finish tapping in a single step of tapping operation due to chips accumulated inside the hole and
cutting load that increases as tapping cycle progresses. In such cases, tapping cycle has to be
repeated until the thread is cut to the bottom of the hole.
The tapping cycle can be repeated by a single block of commands by specifying the G 184 or G
174 command in the solid tap mode (G93).
(1) Commands
The G codes used for deep-hole solid tapping are indicated below.
Table 4.1.4.1 G Codes Used for Deep-hole Solid Tapping
G code Function Group
G184 Deep-hole solid tapping 09
G174 Reverse deep-hole solid tapping 09