
A-60156E
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FANUC Series 16
i
/18
i
/21
i
– TA/TB
Direct input of offset value measured B
for 2 spindle lathe
Jan.31.02
6/13
4. Setting of Z-axis Work Origin Offset (G54
∼
∼∼
∼
G59)
In 2 spindle lathe which has the back spindle, each spindle has the workpiece
coordinate system for itself.
By assigning any G code from G54 to G59 for each workpiece coordinate system,
this function set Z-axis work origin offset of them automatically.
[Z-axis work origin offset]
=
−
([Z-axis tool geometry offset]
−
[Z-axis machine coordinate value])
Any G code from G54 to G59 can be selected manually or automatically by the
parameter No. 5051#1(WNI).
•
WNI=0 (Manual selection)
Set the cursor to the desired workpiece coordinate system G54 to G59 by
operating the MDI (such as page and cursor keys).
•
WNI=1 (Automatic selection)
Set the parameter No. 5054 and No.5055 in advance to the G code number of
the workpiece coordinate system corresponding with them. CNC select the
workpiece coordinate system automatically by their parameters in the
workpiece origin offset write mode.
The tool offset number used for measurement is selected manually or
automatically by the setting of the parameter No.5005#5. (QNI).
•
QNI=0 (Manual selection)
Specify the desired tool compensation number in parameter No. 5020.
•
QNI=1 (Automatic selection)
The cursor is set to the desired tool compensation number, using the tool
compensation number input signal.
For spindle 1, the cursor is set to a tool compensation number selected by
the input signal.
For spindle 2, the cursor is set to the sum of the value specified in parameter
No. 5053 and the tool compensation number selected by the input signal is
used.
Note
You cannot set the value to the external workpiece origin offset (EXT).
When the cursor coincides with the external workpiece origin offset (EXT),
the warning “ ”Write inhibited” occurs in setting the work origin offset value
write signal to 1.
NOTE
If the value set in this parameter is 0, or if the value falls outside the valid data
range, 54 is assumed for the workpiece coordinate system memory for spindle
1, while 57 is assumed for the workpiece coordinate system memory for
spindle 2.