SZGH SZGH-CNC1000MDb Series, Руководство пользователя

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-Shenzhen Guanhong Automation Co.,Ltd.- SZGH-CNC1000MDb Series
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interpolation (G01), or circular interpolation (G02, G03). If two or more blocks that do not move
the tool (miscellaneous function, dwell, etc.) are processed in the offset mode, the tool will make
either an excessive or insufficient cut. If the offset plane is switched in the offset mode, cnc system
will alarm and the tool is stopped.
Offset mode cancel
: In the offset mode, when a block which satisfies any one of the
following conditions is executed, the CNC enters the offset cancel mode, and the action of this
block is called the offset cancel.
1. G40 has been commanded.
2. 0 has been commanded as the offset number for tool compensation.
When performing offset cancel, circular arc commands (G02 and G03) are not available. If a
circular arc is commanded, cnc system will alarm & stops tool.
In the offset cancel, the control executes the instructions in that block and the block in the
cutter compensation buffer. In the meantime, in the case of a single block mode, after reading one
block, the control executes it and stops. By pushing the cycle start button once more, one block is
executed without reading the next block. Then the control is in the cancel mode, and normally, the
block to be executed next will be stored in the buffer register and the next block is not read into the
buffer for tool compensation.
Fig3.20.2 Changing the offset mode
In general, the cutter compensation value shall be changed in the cancel mode, when changing
tools. If the tool compensation value is changed in offset mode, the vector at the end point of the
block is calculated for the new cutter compensation value.
Fig3.20.3 Changing the cutter compensation value
If the offset amount is negative(-), distribution is made for a figure in which G41’s and G42’s
are all replaced with each other on the program. Consequently, if the tool center is passing around
the outside of the workpiece, it will pass around the inside,and vice verse.
The figure below shows one example. Generally, the offset amount is programmed to be
po) . When a tool path is programmed as in (1),, if the offset amount is made negative (-),