Wuhan Huazhong Numerical Control Co., Ltd HNC-18iT v4.0 Programming Manual page 11

1.4 Coordinate
1.4 1.4 Coordinate 1.4 Coordinate Coordinate System
1.4.1 1.4.1 Reference Reference
1.4.1 1.4.1 Reference Reference Point
Reference point is a fixed position on CNC machine tool, which is determined by cams and
measuring system. Generally, it is used when the tool is required to exchange or the
coordinate system is required to set.
There are two ways to move to the reference point:
- Manual reference position return: The tool is moved to the reference point by operating
the button on the machine control panel. It is only used when the machine is turned on.
- Automatic reference position return: It is used after the manual reference position return
has been used. In this manual, this would be introduced.
System
System System
Point Point
Point
Chuck
Figure 1.7 Reference Point
Tool post
Reference
position
7
1. General