
B–63284EN/03
5. DESCRIPTION OF
COORDINATE SYSTEMS
OPERATION
41
The machine coordinate system is set as follows:
Spindle
Chuck
+Z
+X
Machine zero point
Tool post
The above figure shows the state in which a tool post has returned to the
reference position. The X and Z machine coordinates of the position of
the tool post are 0. When the tool post is manually returned to a reference
position, the X and Z machine coordinates of the machine reference
position are automatically set to 0.
The directions of the X– and Z–axes are specified so that the tool post
moves away from a workpiece or the spindle when the tool post moves
in the positive X and Z directions.
This machine coordinate system is kept unchanged, regardless of whether
the program reference position, explained later, is set on the end face of
a workpiece or the end face of the chuck.
The coordinates in the machine coordinate system are indicated on the
all–position display screen or in the MACHINE column on the
conversational program execution screen. The all position display screen
is displayed by pressing the POS function button, then pressing the [ALL]
soft key.
5.1
ONE–PATH LATHE
5.1.1
Machine Coordinate
System