Chapter
Ⅱ
G Commands
115
Ⅰ
Programming
Standard rigid tapping cycle
Q value is not specified or Q value is 0
High speed deep hole rigid
tapping cycle
Q value is specified
(
it is not zero
)
and PCP
(
NO.5200#5
)
=“0”
Deep hole rigid tapping
cycle
Q value is specified
(
it is not zero
)
and RTR
(
NO.5200#5
)
=“1”
z
Standard rigid tapping cycle
(
Q value is not specified or Q value is 0
)
Command format
:
G84 X (U)_ C (H)_ Z (W)_ R_ P_ F_ K_ M_ ; or
G88 Z (W)_ C (H)_ X (U)_ R_ P_ F_ K_ M_ ;
Execution process:
Fig 2-73
z
High speed deep hole rigid tapping cycle (Q value is specified
(
it is not zero
)
and PCP
(
NO.5200#5
)
=“0”)
Before the tool enters the hole bottom, the intermittent tapping is executed and the chip
removal is done with the specified tool retraction amount, which are done repetitive until the
tool reaches the hole bottom, then the tool retracts and the machining ends.
Command format
:
G84 X (U)_ C (H)_ Z (W)_ R_ Q_ P_ F_ K_ M_ ; or
G88 Z (W)_ C (H)_ X (U)_ R_ Q_ P_ F_ K_ M_ ;
Standard rigid tapping cycle
Spindle stop
Operation 3
Operation 5
Operation 2
Operation 6
Initial level
Hole position
Starting
point
Operation 1
Spindle stop
Tool
Operation sequence
P
Pause
Z
(
X
)
feed
Rapid traverse
Spindle rotation
Operation 4 Pause at hole
bottom
Hole bottom level
P
Spindle rotation
(reverse)
Spindle stop
Imaginary workpiece
Point R level
PointR
①
The tool rapidly positions to the
hole from starting point (the hole is
determined by the hole position
data at the initial level
)
;
②
Rapidly position to point R;
③
The spindle starts rotation, and
tapping axis is executed to the hole
bottom level at the speed specified
by F, and the spindle stops when
the axis reaches the hole bottom;
④
Pause is executed in the time
specified by P;
⑤
The spindle starts rotation
reversely and tapping axis retracts
to the R level at the speed specified
by F;
⑥
The spindle stops rotation and
return rapidly to the initial level;
⑦
The standard tapping cycle ends.
Содержание 988T
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