Hurco winmax, Руководство по программированию

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4 - 24 ISNC G Codes
704-0115-307
WinMax Lathe NC Programming
G28 - Automatic Return to Reference Point
Any point within the machine coordinate system can be selected as the reference point.
The return to reference point is often used to move the part forward so you can remove
chips from the part and inspect the part.
The G28 Automatic Return To Reference Point command specifies an automatic return to
the reference point for the designated axes. An intermediate point can be specified with
the X____Y____Z____ parameters. If no intermediate point coordinates are specified,
the system uses the previous intermediate point coordinates. If no intermediate point
coordinates are specified during the current program execution, the machine returns
directly to the reference point.
Modal—No
Format
G28 U____ V____ W____
Parameters
• V—used with machines configured with Y-axis motion.
Examples
These parameters specify the absolute or incremental location of the intermediate point
in coordinates relative to the current coordinate system. The G28 command is only
performed for the axis which follows the G28. For example, if an X value follows the G28,
the machine moves to the X reference point, not the Y or Z reference point.
As another example, a typical method to home the Z axis using incremental mode is
shown below. The combination of G91 and a value of zero for the Z axis causes the Z axis
to move directly to the home (reference) point without moving through an intermediate
point.
G91 G28 Z0
G90
• X indicates Absolute X and (u) indicates Incremental X.
• Y indicates Absolute Y and (v) indicates Incremental Y.
• Z indicates Absolute Z and (w) indicates Incremental Z.