Gfunction Related To Reference Point; Auto Return To Reference Point (G28) - Adtech ADTECH9 Series Programming Manual

The origin of new coordinate system offsets to the position A in the lower
right figure;
The offset of coordinate system is (100, 50), (the difference between the
coordinates of the tool in original coordinate system and IP_ instruction
value).
The coordinates of the tool in new coordinate system are (100, 50).

2.2 Gfunction related to reference point

The machine tool coordinate system is created through returning to reference point after NC is electrified every
time. The reference point is a fixed point on the machine tool, and its position is determined by the installation
position of stopper switch of every axis and the home position of the servo motor of every axis. When this
machine tool returns to the reference point, the coordinates of the reference point in the machine tool
coordinate system is X0, Y0, Z0.

2.2.1. Auto return to reference point (G28)

Function:
This instruction makes the axis return to reference point of the machine tool through the center point specified
by IP at the feeding speed of quick positioning.
Format:
G28 X_ Y_ Z_α_; (α is additional axis)
X Y Z α indicate the coordinates of center point.
Details:
The center point may be specified either in absolute value mode or increment value mode, which depends on
current mode.
ADTECH9 Series CNC Programming Manual
Tool
G92 Instruction Function Diagram
Tool