1. G90/91 absolute/incremental dimension programming
(1) G90 (modal), G90 is an absolute size input, all data corresponds to the actual workpiece zero.
(2) G91 (modal), G91 is an incremental size input, and each size corresponds to the previous contour point.
Two, G70/G71 inch/metric system programming
G70 inch system, G71 metric system, according to the needs of the part drawing, you can switch between the inch system and the metric system when programming the part processing program.
3. G54～G57 set zero offset and establish workpiece coordinate system
G54/G55/G56/G57: Call 1st to 4th to set the zero offset.
Four, G17/G18/G19 plane selection instructions
(1) G17: Processing plane X/Y;
(2) G18: Processing plane Z/X;
(3) G19: Processing plane Y/Z;
The division of the machining plane is used to determine the plane to be machined. It also determines the plane of tool radius compensation, the direction of tool length compensation and the plane of circular interpolation. Generally, the machining plane is defined at the beginning of the program; when using the tool radius compensation command The machining plane must be defined for G41/G42 so that the control system can correct the tool length and radius. The machining center default machining plane is XY plane, and G17 can be omitted. If it is not in the default plane, G17 and G18 cannot be omitted.
Five, G0 fast move command
(1) Programming format. G0 X__ Y__Z__;
(2) Meaning: X__ Y__Z__: the end point coordinates in the rectangular coordinate system;
G00 can be used to quickly move the tool to the workpiece surface or tool change point; this command is not suitable for workpiece processing. When G00 is executed, the tool moves at the fastest possible speed (rapid). This rapid traverse speed is defined for each axis in the machine parameters, but it is adjusted by the override of the feed speed adjustment switch.
