4 - Fagor Automation

Canned cycles (·M· model)
1.11 G211. Inside thread milling cycle
This cycle may be used to make an inside thread through a helical movement of the tool.
Working in Cartesian coordinates, the basic structure of the block is as follows:
G211 Z D I J K B C L A E Q
B
K
L
A
I
Parameter definition:
Z Reference plane.
Defines the reference plane coordinate. It may be programmed either in absolute or
incremental coordinates, in which case it will be referred to the starting plane.
D Safety distance.
Defines the distance between the reference plane and the surface of the part where the milling
is to be done. If not programmed, it assumes 0.
I Machining depth.
Defines the threading depth. It may be programmed either in absolute or incremental
coordinates, in which case it will be referred to the reference plane.
J Thread diameter.
Defines the nominal diameter of the thread The sign indicates the machining direction of the
thread (positive if clockwise and negative if counterclockwise).
K Thread depth.
It defines the distance between the crest and the root of the thread.
J
B Thread pitch.
Defines the thread pitch.
With a positive sign, the direction of the thread pitch is from the surface of the part to the
bottom.
With a negative sign, the direction of the thread pitch is from the bottom to the surface of
the part.
C Type of threading
Defines the type of tapping to be carried out. This parameter depends on the type of tool being
used.
When programming C= 0, the threading will be done in a single pass.
When programming C=1, it will make one thread per each pass (single-edge cutter).
When programming C=n (where n is the number of cutting edges of the cutter), it will make
n threads per each pass.
If not programmed, a value of C=1 is assumed.
Z
D
G00
G01
M03
M04
G98
G99
1.
MILLING CANNED CYCLES.
G211. Inside thread milling cycle
CNC 8065
(REF: 1209)
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