-Shenzhen Guanhong Automation Co.,Ltd.-
SZGH-CNC1000MDb Series
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3.14 Coordinate System
By teaching the CNC a desired tool position, the tool can be moved to the position. Such a tool
position is represented by coordinates in a Coordinate system. Coordinates are specified using
program axes.
When three programming axes, X-axis, Y-axis and Z-axis are used, coordinates are specified as
follows:
X_Y_Z_
This command is referred to as a dimension word.
Fig3.10.1 Tool Position specified by X40.0 Y50.0 Z25.0
Coordinates are specified in one of following three coordinate systems:
(1) Machine coordinate system
(2) Workpiece coordinate system
(3) Local coordinate system
The number of the axes of a Coordinate system varies from one machine to another. So, in this
manual, a dimension word is represented as IP_.
3.14.1 Machine Coordinate System (G53)
The point that is specific to a machine and serves as the reference of the machine is referred to
as the machine zero point. A machine tool builder sets a machine zero point for each machine.
A coordinate system with a machine zero point set as its origin is referred to as a machine
Coordinate system.
A machine coordinate system is set by performing manual reference position return after
power-on(See chapter 5.5.4). A machine Coordinate system, once set, remains unchanged.
Format: G53 IP_ ;
When a position has been specified as a set of machine coordinates, the tool moves to that
position by means of rapid traverse. G53, used for selecting the machine coordinate system, is a
one–shot G code. Any commands based on the selected machine coordinate system are thus
effective only in the block containing G53. When the tool is to be moved to a machine–specific
position such as a tool change position, program the movement in a machine coordinate system
based on G53.
When manual reference position return is performed after power-on, a machine coordinate
