GSK GSK988TA, Manual

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GSK988TA/GSK988TA1/GSK988TB Turning Center CNC System User Manual 【 Programming & Operation 】
86
Ⅰ
Programming
finishing path(ns block)is called B point; the end point of finishing path(end point
of nf block)is called C point. The finishing path is A → B → C
Roughing
path
It is one group of offset path of finishing one, and the roughing path times are the
same that of cutting. After the coordinates offset, A, B, C of finishing path
separately corresponds to A
n,
B
n,
C
n
of roughing path(n is the cutting times, the
first cutting path is A
1
, B
1
, C
1
and the last one is A
d,
B
d,
C
d
). The coordinates
offset value of the first cutting compared to finishing path is
（
∆ i×2+ ∆ u
，
∆ w+ ∆ k
）
（
diameter programming
）
, the coordinates offset value of the last cutting
compared to finishing path is
（
∆ u
，
∆ w
），
the coordinates offset value of each
cutting compared to the previous one is
（
∆ i×2/d-1
，
∆ k/d-1
）
∆ i
Travel of X tool retraction in roughing is the following table （ radius value with
sign symbols
）
, ∆ i is equal to X coordinate offset value
（
radius value
）
of A
1
point
compared to A
d
point. The X total cutting travel(radius value) is equal to | ∆ i| in
roughing, and X cutting direction is opposite to the sign symbol of ∆ i: ∆ i
＞
0, cut
in X negative direction in roughing. It is reserved after ∆ i code value is executed
and the system rewrites No.5135 value. NO.5135 value is regarded as the travel
of X tool retraction of roughing when U
（
∆ i
）
is not input
∆ k
Travel of Z tool retraction in roughing is the following table （ radius value with
sign symbols ） , ∆ k is equal to X coordinate offset value （ radius value ） of A1point
compared to A
d
point. The Z total cutting travel(radius value) is equal to | ∆ k| in
roughing, and Z cutting direction is opposite to the sign symbol of ∆ k: ∆ k ＞ 0, cut
in Z negative direction in roughing. It is reserved after ∆ k code value is executed
and the system rewrites No.5136 value. NO.5136 value is regarded as the travel
of X tool retraction of roughing when W （ ∆ k ） is not input
d
It is the cutting times and its range is referred to the following table. R5 means
the closed cutting cycle is completed by 5 times cutting. R
（
d
）
is reserved after
it is executed and the system rewrites NO.5137. The value of system parameter
NO.5137 is regarded as the cutting times when R
（
d
）
is not input
ns Block number of the first block of finishing path
nf Block number of the last block of finishing path
∆ u
It is X finishing allowance as the following table (diameter value with sign
symbols ) and is the X coordinate offset of roughing contour compared to
finishing path, i.e. the different value of X absolute coordinates of A
1
compared
to A. ∆ u
＞
0
，
it is the offset of the last X positive roughing path compared to
finishing path. The system defaults ∆ u=0 when U
（
∆ u
）
is not input, i.e. there is
no X finishing allowance for roughing cycle
∆ w
It is Z finishing allowance as the following table -99.999~99.999 (unit: mm ) and
is the Z coordinate offset of roughing contour compared to finishing path, i.e. the
different value of Z absolute coordinate of A
1
compared to A. ∆ w
＞
0
，
it is the
offset of the last roughing path compared to finishing path in Z positive direction.