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8 The Reference Point
8 The Reference Point
The reference point is a distinguished position on the
Fig. |
8.1 Automatic Reference Point Return (G28)
The instruction G28 v
will return the axes defined by vector v to the reference point. The movements consist of two parts. First it will move with linear interpolation in rapid traverse to the intermediate coordinates defined by vector v. The specified coordinates may be absolute or incremental values. The movement is performed invariably in the current coordinate system .
When the end point of linear movement is reached, the cutter compensation vector is deleted. The coordinates of the intermediate point will be stored for axes defined by vector v.
In the second stage it will move from the intermediate point to the
This is a
LNotes:
–Unless there is a valid reference point, incremental values must be assigned to intermediate coordinates v in command G28.
–Programmed in block G28, intermediate coordinates v will be stored until
G28 X100 intermediate point: X=100, Y=0
G28 Y200 intermediate point: X=100, Y=200
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