PROGRAMMING
B–63534EN/02
22. RISC PROCESSOR
651
Tool center point control and three–dimensional cutter compensation can
be used at the same time.
Three–dimensional cutter compensation is applied to a specified tool tip
point. Three–dimensional cutter compensation, however, is not
performed momentarily in the middle of a block; it is performed only at
the end of a block.
When tool center point control (type 2) is used during three–dimensional
coordinate conversion, the tool axis orientation (I, J, K) is also subjected
to three–dimensional coordinate conversion.
NOTE
Whenever using tool center point control (type 2), set bit 2
(ROAx) of parameter No. 1008 to 1 to perform rotation axis
rollover.
When using tool center point control, also use look–ahead acceleration/
deceleration before interpolation. If look–ahead acceleration/deceleration
before interpolation is not used, the feedrate may exceed the maximum
cutting feedrate as a result of tool center point control, which will cause
alarm P/S5422 to be issued.
Example:
Interpolation path
Tool tip center path
In the above example, the feedrate is controlled so that the tool tip center
moves at a specified feedrate. As a result, a higher feedrate than the
specified feedrate is detected on the interpolation path. In such a case, if
look–ahead acceleration/deceleration before interpolation is used, the
feedrate is clamped so that the feedrate on the interpolation path does not
exceed the maximum cutting feedrate. If look–ahead acceleration/
deceleration before interpolation is not used, the feedrate on the
interpolation path may become higher than the maximum cutting
feedrate, resulting in alarm P/S5422 being issued.
D Three–dimensional
cutter compensation
D Three–dimensional
coordinate conversion
D Rotation axis rollover
Restrictions
D Look–ahead
acceleration/deceleration
before interpolation