Chapter 3 G Command
83
I Programming
Related explanation:
(1) This cycle is used to be bore a hole. The command operation is basically same with G81, only
spindle rotation status is different. After cut feeds to the bottom of a hole, the M05 is executed (spindle
stops), then the point R plane is retracted at the rapid traverse, the M03 is then performed (spindle rotates
positively) regardless of the currently spindle rotation status and the positive or negative rotation are
specified before the canned cycle.
(2) The command Q and P are disabled in this cycle, but its value is reserved as canned cycle modal
value.
3.24.2.10 Back Boring Cycle G87
Command format
G87 X_ Y_ Z_ R_ Q_ P_ F_ L_
X_
Y_
:
hole’s positioning data.
Z
:
hole depth. Incremental specifies distance between point R plane and hole bottom or absolute value
specifies coordinates of hole bottom.
R
:
Incremental specifies distance between point R plane and hole bottom or absolute value specifies
coordinates of point R plane.
Q
:
Offset amount of hole bottom.
P
:
Pause time of hole bottom.
F
:
Cutting feedrate.
L
:
L means quantity of holing from starting point and point set by G87. L means times of currently
circular holing when G87 does not set holing point.
Command function
Back boring cycle is used to boring precise hole, and the tool safely retracts to the initial plane after
machining completion.
Cycle process
Rapidly position to XY plane;
⑴
The spindle orientation is done and stops at the fixed position after XY plane positions;
⑵
Traverse Q distance;
⑶
Rapidly traverse to point R;
⑷
Traverse Q distance;
⑸
Spindle rotates CW;
⑹
Execute boring cycle
⑺
to point Z;
When P is commanded, the system pauses at P time;
⑻
⑼
The spindle orientation is executed, it stops at the fixed position;
⑽
Traverse Q distance;
⑾
Return to initial plane;
⑿
Offset Q distance to XY initial position;
Summary of Contents for 980MDc
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Page 20: ...1 I Programming Programming Ⅰ ...
Page 21: ...GSK980MDc Milling CNC System User Manual 2 I Programming ...
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Page 200: ...Chapter 1 Operation Mode and Display 181 Ⅱ Operation ...
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Page 320: ...301 Ⅲ Installation Ⅲ Installation ...
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Page 392: ...Appendix 373 Appendix Appendix ...
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Page 394: ...Appendix 375 Appendix Appendix 1 Outline Dimension of GSK980MDc L N ...