
B-63943EN-1/02 4.REFERENCE POSITION ESTABLISHMENT
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A time chart for the above procedure is shown below.
G00 command
Reference mar
ZRFn
Feedrate
FL
feedrate
Time
Rapid
traverse
Fig. 4.9.1 (a) Time chart for reference position establishment (G00)
The specifications for the steps of detecting reference marks and
establishing the reference position (steps <1> to <3> above) are the
same as for the conventional distance coded linear scale interface.
The restrictions are also the same.
For details, refer to "Specifications of Linear Scale with Absolute
Addressing Reference Marks, FANUC Series 30i."
- Tool path
The tool path in the G00 command is explained below.
(1) When no axis requires the reference position establishment When
the reference position has already been established for all
specified axes, the reference position establishment operation is
not performed.
For example, suppose that the reference position is already
established for the X-, Y-, and Z-axes, and that G00 Xxx Yyy
ZZz; is specified. Then, normal rapid traverse operation takes
place. The tool path follows the setting in bit 1 (LRP) of
parameter No. 1401.
(2) When all axes require the reference position establishment
operation
Suppose that the reference position is not established for the X-,
Y-, and Z-axes and that G00 Xxx Yyy Zzz; is specified. The
operation in this case is shown in the figure below.
Operation 1 in the figure establishes the reference position.
During the establishment operation, the tool path is always of the
non-linear interpolation type regardless of the setting in bit 1
(LRP) of parameter No. 1401.
Operation 2 performs positioning to a specified end point.
During this operation, the tool path follows the setting in bit 1
(LRP) of parameter No. 1401.
After operation 1 is completed for all axes, operation 2 starts.