Return To The Reference Point (G28) - Brother TC-32B Manual

Chapter 3 Preparation Function
3.11

Return to the Reference Point (G28)

Command format
This command provides an automatic return to the reference point through an
intermediate point for commanded axes. Positioning to the reference point is made through an
intermediate point as specified by X_Y_Z_A_B_C_.
It can be 3.12 Selection of machine coordinate system (G53) commanded by either the absolute
command (G90) or the incremental command (G91).
The coordinate values of the intermediate point commanded in this block are memorized.
All the commanded axes are moved to the reference point at the rapid traverse rate by way of
intermediate point.
(Note 1)
3
(Note 2)
(Note 3)
(Note 4)
(Note 5)
(Note 6)
2004/01/22
G28X_Y_Z_A_B_C_;
As for the coordinate value of the intermediate point, only the values
commanded by this G28 block are newly memorized.
The coordinate value of axis not commanded by this G28 block is
regarded as that of previous G28 block.
The reference point is set by the user parameter.
A tool motion to the intermediate point or the reference point is done by
positioning, and interpolation is not available.
During the single block operation, the block stops at the intermediate
point.
The coordinate value of the intermediate point is memorized by the
absolute value in the working coordinate system.
working coordinate system is changed after the G28 is commanded, the
intermediate point is also changed to the new coordinate system.
When the additional axis is commanded while an optional additional
axis is not installed, an alarm will occur.
3 - 36
TC-32B
Therefore, if the
eTCOMNCPR3.doc