
10.TOOL FUNCTION B-63783EN-1/01
- 1008 -
- Offset cancel mode
At the beginning when power is applied the control is in the cancel
mode. In the cancel mode, the vector is always 0, and the tool center
path coincides with the programmed path.
-Start Up
When a cutter compensation command (G41 or G42, nonzero
dimension words in the offset plane, and D code other than D0) is
specified in the offset cancel mode, the CNC enters the offset mode.
Moving the tool with this command is called start-up.
Specify positioning (G00) or linear interpolation (G01) for start-up. If
circular interpolation (G02, G03) is specified, alarm PS070 occurs.
When reading a start-up block and subsequent blocks, the CNC first
reads the number of blocks specified in parameter No. 6009.
- Offset mode
In the offset mode, compensation is accomplished by positioning (G00),
linear 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, alarm PS0271 occurs 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 cutter
compensation.
When performing offset cancel, circular arc commands (G02.2 and
G03.2) are not available. If a circular arc is commanded, an P/S alarm
(No.270) is generated and the tool stops. 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.
Fig. 10.4.3 (b) Changing the offset mode
- Setting the cutter compensation value
Assign a cutter compensation values to the D codes on the MDI panel.
Offset cancel mode
Offset mode
Offset mode cancel
(G40/D0)
Start up
(G41/G42)