GSK 980TDi, Руководство пользователя

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Chapter 3 G Commands
127
Ⅰ
Programming
O0007;
G0 X36 Z5 M3 S500; (Start spindle and position to starting point of machining)
G74 R0.5 ; (Machining cycle)
G74 X20 Z-20 P30000 Q50000 F50; (Z tool infeed 5mm and tool retraction 0.5mm each time;
rapid return to starting point (Z5) after cutting feed to end point
(Z-20), X tool infeed 3mm and cycle the above-mentioned
steps)
M30; (End of program)
3.22.6 Radial Grooving Multiple Cycle G75
Command format ： G75 R(e) ；
G75 X(U) Z(W) P( Δ i) Q( Δ k) R( Δ d) F
；
Command function: Axial (Z) tool infeed cycle compounds radial discontinuous cutting cycle:
Tool infeeds from starting point in radial direction, retracts, infeeds again,
and again and again, and last tool retracts in axial direction, and retracts to
position in radial direction, which is called one radial cutting cycle; tool
infeeds in axial direction and execute the next radial cutting cycle; cut to
end point of cutting, and then return to starting point (starting point and
end point are the same one in G75), which is called one radial grooving
compound cycle. Directions of axial tool infeed and radial tool infeed are
defined by relative position between end point X(U) Z(W) and starting
point of cutting. G75 is used for machining radial loop groove or column
surface by radial discontinuously cutting, breaking stock and stock
removal.
Relevant definitions:
Starting point of radial cutting cycle:
Starting position of axial tool infeed for each radial cutting
cycle, defined by A
n
(n=1, 2, 3……), X coordinate of A
n
is
the same that of starting point A, the different value of X
coordinate between A
n
and A
n-1
is Δ k. The starting point
A
1
of the first radial cutting cycle is the same as the
starting point A, and Z starting point (A
f
) of the last axial
cutting cycle is the same that of cutting end point.
End point of radial tool infeed: Starting position of radial tool infeed for each radial cutting
cycle, defined by B
n
(n=1, 2, 3……), X coordinates of B
n
is
the same that of cutting end point, Z coordinates of B
n
is the
same that of A
n
, and the end point (B
f
) of the last radial tool
infeed is the same that of cutting end point.
End point of axial tool retraction: End position of axial tool infeed (travel of tool infeed is Δ d)
after each axial cutting cycle reaches the end point of axial
tool infeed, defining with C
n
(n=1,2,3……), X coordinate of
C
n
is the same that of cutting end point, and the different
value of Z coordinate between C
n
and A
n
is Δ d;
End point of radial cutting cycle: End position of radial tool retraction from the end point of
axial tool retraction, defined by D
n
(n=1, 2, 3……), X
coordinate of D
n
is the same that of starting point, Z
coordinates of D
n
is the same that of C
n
(the different value