
B-63874EN/05 CYCLE MACHINING TYPES 2.TURNING
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DETAIL
Data item Meaning
L ENTRANCE CLEARANCE Distance between a thread start point and machining start point
(approach point) in the Z-axis direction (radius value, positive
value)
Remark) By referring to the parameter No. 27157 (minimum
clamp value), the system sets the data as an initial
value.
M EXIT CLERANCE Distance between a thread end point and threading operation
end point in the Z-axis direction. (radius value, positive value)
Remark) By referring to the parameter No. 27158 (minimum
clamp value), the system sets the data as an initial
value.
Y CUT DEPTH DIRECTION As to X axis Cut direction,
[-X] : Cuts in the –X direction.
[+X] : Cuts in the +X direction.
Remark) This data item is enable when the parameter
No.27100#0 = 1. (COPY)
• Tool path
<1> The tool moves to the position "thread start point + thread
surface clearance (D in the X-axis direction)" and position thread
entry clearance (L in the Z-axis direction) by rapid traverse.
<2> Threading is performed using a specified cutting method. The
end point of threading in the Z-axis direction is the thread exit
clearance apart from the thread end point.
<3> If [NUMBER] is specified as a cut-in type, threading is
performed as many times as the [NUMBER] value. If [DEPTH]
is specified, this amount is used in the first cut-in and threading
is performed until the specified thread figure is obtained.
<4> After all portions are cut, the tool moves to the position "cut-in
start position + clearance (L)" in the X-axis direction at the rapid
traverse rate.
External-thread cutting
Internal-thread cutting