SZGH SZGH-CNC1000MDb Series, Руководство пользователя

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-Shenzhen Guanhong Automation Co.,Ltd.- SZGH-CNC1000MDb Series
- 34 -
3.10 Reference Position
A CNC machine tool has a special position where, generally, the tool is exchanged or the
coordinate system is set, as described later. This position is referred to as a reference position.
Reference Position Return(G28/G281/G282/G283/G284/G285/G301/G302/G303/G304/G305):
The reference position is a fixed position on a machine tool to which the tool can easily be moved
by the reference position return function.If there is machine zero point(hardware switch),it is also
reference point; when user set float zero point(software switch) as home and system will take float
zero point as reference point.
Tools are automatically moved to the reference position via an intermediate position alone a
specified axis. Or,tools are automatically moved from the reference position to a specified position
via an intermediate position along a specified axis.
Fig3.9.1 Reference Position Return & Return from Reference Position
Format: G28 X(U)_ Y(V)_ Z(W)_ A_ ; Reference Position Return
X(U)_Y(V)_Z(W)_A_ are intermediate position(Absolute/incremental command).
G281 ; Only X-axis return to reference position
G282 ; Only Y-axis return to reference position
G283 ; Only Z-axis return to reference position
G284 ; Only A-axis return to reference position
G285 ; Only B-axis return to reference position
G301 ; Only X-axis return to Coordinate zero point
G302 ; Only Y-axis return to Coordinate zero point
G303 ; Only Z-axis return to Coordinate zero point
G304 ; Only A-axis return to Coordinate zero point
G305 ; Only B-axis return to Coordinate zero point
Positioning to the intermediate or reference positions are performed at the rapid traverse rate of
each axis. Therefore, for safety, the cutter compensation, and tool length compensation should be
canceled before executing this command.
Note:1.When use G28 code to return to reference position, if just specify intermediate position of some axes,
which can return to reference position,others axes that don’t be specified cannot return to reference position.
2. Before run these codes, reference position must be set well.
3. After return to reference position, system will cancel tool compensation automatically.