GSK GSK980TDc, Manual

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Chapter 1 Programming
7
Ⅰ
Progra
mming
1.3 Programming Fundamentals
1.3.1 Coordinates definition
Sketch map of CNC turning machine is as follows:
Fig. 1-3
GSK980TDc uses a rectangular coordinate system composed of X, Z axis. X axis is
perpendicular with axes of spindle and Z axis is parallel with axes of spindle; negative directions of
them approach to the workpiece and positive ones are away from it.
There is a front tool post and a rear tool post of NC turning machine according to their relative
position between the tool post and the spindle, Fig. 1-4 is a coordinate system of the front tool post
and Fig. 1-5 is a rear tool post one. It shows exactly the opposite of X axes, but the same of Z axes
from figures. In the manual, it will introduce programming application with the front tool post
coordinate system in the following figures and examples.
X
Z
X
Z
Fig.1-4 Front tool post coordinate system Fig.1-5 Rear tool post coordinate system
1.3.2 Machine coordinate system, Machine Zero and machine reference point
Machine tool coordinate system is a benchmark one used for CNC counting coordinates and a
fixed one on the machine tool. Machine tool zero is a fixed point which position is specified by zero
switch or zero return switch on the machine tool. Usually, the zero return switch is installed on max.
stroke in X, Z positive direction. Machine reference point is located at the position at which the
machine zero value adding the data parameter No.114/No.115 value. When No.114/No.115 value is 0,
the machine reference point coincides with the machine zero. The coordinates of machine reference