GSK GSK980TDc, Руководство пользователя

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Chapter 3 G Commands
109
Ⅰ
Progra
mming
the same that of starting point A, the different value of X
coordinate between A
n
and A
n-1
is Δ i. The starting point A
1
of the first axial cutting cycle is the same as the starting
point A, and the X coordinate of starting point (A
f
) 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 B
n
(n=1,2,3……), Z coordinate of B
n
is the same
that of cutting end point, X coordinate of B
n
is the same that of
A
n
, and the end point (B
f
) 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 Δ d)
after each axial cutting cycle reaches the end point of axial
tool infeed, defining with C
n
(n=1,2,3……), Z coordinate of
C
n
is the same that of cutting end point, and the different
value of X coordinate between C
n
and A
n
is Δ d;
End point of axial cutting cycle: end position of axial tool retraction from the end point of
radius tool retraction, defining with D
n
(n=1, 2, 3……), Z
coordinate of D
n
is the same that of starting point, X
coordinate of D
n
is the same that of C
n
(the different value
of X coordinate between it and A
n
is Δ d);
Cutting end point: it is defined by X(U) Z(W) , and is defined with B
f
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 B
f
(unit: mm).
U: Different value of X absolute coordinate between cutting end point B
f
and starting point.
Z: Z absolute coordinate value of cutting end point B
f
(unit: mm).
W: Different value of Z absolute coordinates between cutting end point B
f
and starting point.
P ( Δ i)
：
radial(X) cutting for each axial cutting cycle , range: 0
＜
Δ i ≤ 9999999× least input
increment (unit: least input increment, diameter value, without sign symbol).
Q ( Δ k)
：
radial(Z) cutting for each axial cutting cycle, range: 0
＜
Δ k ≤ 9999999× least input
increment (unit: least input increment, diameter value, without sign symbol).
R( Δ d) : 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(
Δ i)
are omitted.
Execution process: (Fig. 3-34)
① Axial (Z) cutting feed △ k from the starting point of axial cutting cycle, feed in Z
negative direction when the coordinates of cutting end point is less than that of
starting point in Z direction, otherwise, feed in Z positive direction;
② Axial (Z) rapid tool retraction e and its direction is opposite to the feed direction of ① ;
③
X executes the cutting feed ( Δ k+e) again, the end point of cutting feed is still in it
between starting point A
n
of axial cutting cycle and end point of axial tool infeed, Z
executes the cutting feed ( Δ k+e)again and execute ② ; after Z executing the cutting