GSK GSK988TA, Manual

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GSK988TA/GSK988TA1/GSK988TB Turning Center CNC System User Manual 【 Programming & Operation 】
90
Ⅰ
Programming
2.19.4 Finishing Cycle G70
Command function
：
The tool executes the finishing of workpiece from start point along with the
finishing path defined by ns
～
nf blocks. After executing G71, G72 or G73
to roughing, execute G70 to finishing and single cutting of finishing
allowance is completed. The tool returns to start point and execute the
next block following G70 block after G70 cycle is completed.
Command format
：
G70 P
（
ns
）
Q
（
nf
）
;
Code specifications:
1. ns
：
Block number of the first block of finishing path, range: 1
～
99999;
nf
：
Block number of the last block of finishing path, range: 1
～
99999;
G70 path is defined by programmed one of ns ～ nf blocks. Relationships of relative position of
ns, nf block in G70 ～ G73 blocks are as follows:
……
G71/G72/G73 ……;
N (ns)……;
………;
……F;
Blocks for finishing path
……S;
N (nf) ……;
G70 P
（
ns
）
Q
（
nf
） ；
……
2. G70 is compiled following ns
～
nf blocks;
3. F, S, T in ns
～
nf blocks are valid when executing ns
～
nf to code G70 finishing cycle;
4. G96, G97, G98, G99, G40, G41, G42 are valid in G70;
5. When G70 is executed, the system can stop the automatic run and manual traverse, but
return to the position before manual traversing when G70 is executed again, otherwise, the
following path will be wrong;
6. When the system is executing the single block, the program pauses after the system has
executed end point of current path;
7. G70 cannot be executed in MDI mode, otherwise, an alarm occurs.
Note: When the tool cuts to the end point of finishing shape in the finishing cycle, the two axes
simultaneously returns to the cycle start point, so the user should pay attention to avoid overcut.
2.19.5 Axial Grooving Multiple Cycle G74
Command function: Axial (X) tool infeed cycle compounds radial discontinuous cutting cycle:
Tool infeeds from start point in radial direction(Z), retracts, infeeds again,
and again and again, and last tool retracts in axial direction, and retracts to
the Z 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 start point (start point and end