5238-E P-100
SECTION 7 FIXED CYCLES
Example Program: Variable Lead Thread
LE33013R0300900040003
[Supplement]
• Increasing lead: E+
• Decreasing lead: E-
The "+" sign may be omitted.
The sign of an E word expresses increasing or decreasing lead.
N001
N002
N003
N004
G00
G33
X0
X1
X2
X3
Z0
Z1 E1 F2.5
Positioning to thread cutting starting point X0,
Z0 at a rapid feedrate.
• X and Z words can be determined in the same
manner as when cutting a straight thread.
• The F word specifies the first lead employed
in starting the thread cutting cycle.
F2.5 in this example.
• With an E word in G33 block, variable lead
thread cutting cycle is performed along the
paths indicated in the drawing above.
• The value of an E word is used to specify the
lead variation rate per pitch.
If it is 1 mm, set "E1".
Program Z dimension for each succeeding
thread cutting pass.
Z1
Z0
X1
X0
9876543
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