B-63324EN/03 PROGRAMMING 13.FUNCTIONS TO SIMPLIFY PROGRAMMING
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13.2.4 Peck Rigid Tapping Cycle (G84 or G74)
Tapping a deep hole in rigid tapping mode may be difficult due to chips
sticking to the tool or increased cutting resistance. In such cases, the
peck rigid tapping cycle is useful. So, the peck rigid tapping cycle
function, which performs cutting several times from point R to point Z,
can be specified.
After positioning along the X- and Y-axes, rapid traverse is performed
to point R. From point R, cutting is performed with depth Q (depth of
cut for each cutting feed), then the tool is retracted by distance d. The
parameter 5883 specifies whether retraction can be overridden or not.
When point Z has been reached, the spindle is stopped, then rotated in
the reverse direction for retraction.
- Retraction distance
The retraction distance to be moved each time is set by parameter No.
- Peck rigid tapping cycle
(1), the cutting feedrate specified by F is
(2), the feedrate can be overridden by
G84.2 EG84.3 @(G98) G84.2 EG84.3 @(G99)
G84.2 (or G84.3) X_ Y_ Z_ R_ P_ Q_ F_ L_ S_ ;
X_ Y_ : Hole position data
The distance from point R to the bottom of the hole and the position of the bottom of the hole
R_ : The distance from the initial level to point R level
P_ : Dwell time at the bottom of the hole and at point R when a return is made
Q_ : Depth of cut for each cutting feed
F_ : The cutting feedrate
L_ : Number of repeats (if required)
Point R level
Point R level
S_ : Spindle speed