GSK GSK988TA, Manual

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Chapter 2 G Commands
67
Ⅰ
Programming
1. A block including G61 exactly stops the end point of the program before the system executes
the next block, which is used to process sharp edges and corners. G61 is modal and valid
before G64 is executed. The programmed contour is the same that of the actual.
2. G64 is modal, valid and default before G61 is executed. G64 path is different from that of G61
as Fig. 2-27;
3. G61, G64 belong to Group 15, and their relations with other G groups are referred to Group 5.
4. When G0 is executed, it is in the exact stop in cutting mode because it is non cutting code.
5. When G61 /G64 is specified, it is value in the next executed block.
Fig. 2-27
2.18 Fixed Cycle Code
To simplify programming, GSK988TA/988TA1/988TB defines G code of single machining cycle
with one block to complete the rapid traverse to position, linear/thread cutting and rapid traverse to
return to the start point:
G90: axial cutting cycle; G92: thread cutting cycle; G94: radial cutting cycle;
Note: G92 thread cutting fixed cycle code is described in
Section Thread Function.
2.18.1 Axial Cutting Cycle G90
Command function: From start point, the cutting cycle of cylindrical surface or taper surface is
completed by radial feeding(X) and axial (Z or X and Z) cutting.
Command format: G90 X
（
U
）
__ Z
（
W
）
__ F__
； （
cylinder cutting
）
G90 X （ U ） __ Z （ W ） __ R__ F__ ；（ taper cutting ）
Code specifications: G90 is modal;
X_,Z_ Coordinates of longitudinal cutting (C point in the figure below)
U_,W_ Movement to end point (C point in the figure below) of longitudinal cutting
F_ Cutting feedrate
R_
Taper
（
radius value, with direction, range referred to the table below
Z
X
O
Tangential point
Tangential point
Tool path when specifying exact stop
Tool path in cutting mode