TOMATECH AUTOMATION
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 axial cutting cycle: starting position of axial tool infeed for each axial
cutting cycle, defining with An(n=1,2,3……), Z coordinate of An is
the same that of starting point A, the different value of X coordinate between An and An-1 is
Δi. The starting point A1 of the first axial cutting cycle is the same as the starting
point A, and the X coordinate of starting point (Af ) of the last axial cutting cycle is the
same that of cutting end point.
End point of axial tool infeed: starting position of axial tool infeed for each axial cutting
cycle,defining with Bn(n=1,2,3……), Z coordinate of Bn is the same
that of cutting end point, X coordinate of Bn is the same that of An , and the end point (Bf )
of the last axial tool infeed is the same that of cutting end point.
End point of radius tool retraction: end position of radius tool infeed (travel of tool
infeed is Δd) after each axial cutting cycle reaches the end point of axial
tool infeed, defining with Cn(n=1,2,3……), Z coordinate of Cn is the same that of cutting
end point, and the different value of X coordinate between Cn and An is Δd;
End point of axial cutting cycle: end position of axial tool retraction from the end point of
radius tool retraction, defining with Dn(n=1, 2, 3……), Z coordinate of Dn is the same that
of starting point, X coordinate of Dn is the same that of Cn (the different value
of X coordinate between it and An is Δd);
Cutting end point: it is defined by X(U) Z(W) , and is defined with Bf of the last axial
tool infeed.
R(e) : it is the tool retraction clearance after each axial(Z) tool infeed, and its range is
0~99.999(unit：mm) without sign symbols. The specified value is reserved validly after
R(e) is executed and the data is switched to the corresponding value to save to NO.056.
The NO.056 value is regarded as the tool retraction clearance when R(e) is not input.
X: X absolute coordinate value of cutting end point Bf (unit: mm).
U: Different value of X absolute coordinate between cutting end point Bf and starting point.
Z: Z absolute coordinate value of cutting end point Bf (unit: mm).
W: Different value of Z absolute coordinates between cutting end point Bf and starting
point.
P(Δi) ：radial(X) cutting for each axial cutting cycle , range: 0＜Δi≤ 9999999× least input
increment (unit: least input increment, diameter value, without sign symbol).
Q(Δk)：radial(Z) cutting for each axial cutting cycle, range: 0＜Δk≤ 9999999× least input
increment (unit: least input increment, diameter value, without sign symbol).
R(Δd) : radial (X) tool retraction after cutting to end point of axial cutting, range:
0~99999999×
least input increment (unit: mm/inch, diameter value, without sign symbol).. The radial (X)
tool retraction clearance is 0 when the system defaults the axial cutting end point. The
system defaults the tool retraction is executed in positive direction when X(U) and P(Δi)
are omitted.
Execution process: (Fig. 3-34)
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