5238-E P-102
SECTION 7 FIXED CYCLES
3.
Non-Fixed Thread Cutting Cycle (G34, G35)
[Function]
Used for a variety of special thread cutting, such as parts combining a straight thread with a taper
thread, or a variable lead thread and straight thread.
[Programming format]
G34 X__ Z__ (E__) F__ (C__) (J__)
G35
[Details]
•
Thread cutting is performed from the actual position to the position X, Z with a lead of F.
•
If a lead variation amount, E, is specified, the thread cutting start position increases (G34) or
decreases (G35) by the amount specified for E every pitch.
Example:
LE33013R0300900050001
[Supplement]
F
: Thread lead
E
: Lead variation amount
C
: Thread cutting phase difference (if not specified, the control assumes C=0)
J
: Number of threads within the specified lead F (if not specified, the control assumes J=1)
1) The lead for the straight thread in the example above is the one at the start point (Z0) of the
variable lead thread. If the straight thread is required to be cut with the lead obtained at point
Z1, specify an F word again.
2) To specify the thread lead along the axis parallel to the X-axis, command M27. As M27 is
effective only within one block, specify M27 for individual blocks when selecting the thread lead
along the X-axis. For thread lead along the Z-axis, specify M26.
Taper thread (variable lead)
Straight (constant lead)
X
0
Z
0
X
1
Z
1
X
2
Z
2
G00
G34
G34
X
0
X
1
Z
0
Z
1
Z
2
E
E
0
F
