GSK 988T, User Manual

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Chapter
Ⅱ
G Commands
75
Ⅰ
Programming
ISC system
1 ～ 99999 1 ～ 99999
Execution process ： Fig. 2-44
①
X rapidly traverses to A’ from A point, X travel is Δ u, and Z travel is Δ w;
② X moves from m A’is Δ d( tool infeed), ns block is for tool infeed at rapid traverse
speed with G0, is for tool infeed at G72feedrate F in G1, and its direction of tool
infeed is that of A
→ B point;
③ X executes the cutting feeds to the roughing path, and its direction is the same that
of X coordinate B → C point;
④
X, Z execute the tool retraction e (45°straight line)at feedrate, the directions of tool
retraction is opposite to that of tool infeed ;
⑤
X rapidly retracts at rapid traverse speed to the position which is the same that of Z
coordinate;
⑥
After Z tool infeed ( Δ d+e)again is executed, the end point of traversing tool is still on
the middle point of straight line between A’ and B’(the tool does not reach or
exceed B’), and after Z executes the tool infeed (
Δ d+e)again, is executed ③ ； after
the tool infeed ( Δ d+e) is executed again, the end point of tool traversing reaches
B’ point or exceeds the straight line between A’ → B’ point and Z executes the tool
infeed to B’ point, and then the next step is executed;
⑦
Cutting feed from B’ to C’ point along the roughing path;
⑧ Rapidly traverse to A from C’ point and the program jumps to the next clock
following nf block after G71 cycle is completed.
Fig. 2-44
Coordinate offset direction with finishing allowance:
Δ u, Δ w define the coordinates offset and its direction of finishing, and their sign symbols
are as follows Fig. 2-45: B → C for finishing path, B’ → C’ for roughing path and A is the starting
point.