
B-63784EN-1/01 OPERATION 4.AUTOMATIC OPERATION
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- Single block halt position
Blocks created internally by the control unit contain a single block
when reverse movement is performed.
Path after offset
Programmed path
(2)
2
3
4
5
Fig. 4.11 (l) Tool path after cutter compensation
In the above example, axis movement commands for five blocks are
actually created in program execution even if two blocks are
programmed.
In this case, the single block halt position may differ during reverse
movement and forward return movement.
- Programmable data setting (G10)
A tool compensation value, parameter, pitch error data, workpiece zero
point offset value, and tool life management setting specified or
modified using the programmable data setting code (G10) are ignored
in reverse movement and forward return movement.
- Coordinate system setting (G92)
The current position of the coordinate system setting (G92) during
reverse movement may differ from the current position during forward
return movement. Actual machine coordinates, however, do not differ.
- Mirror image
In blocks where the mirror image function is specified by
programmable mirror image codes G50.1 and G50.2, reverse
movement is performed along a tool path that is the mirror image of the
programmed tool path.
Blocks where the mirror image function is specified by setting data or
machine signals are stored to memory without mirror image being
applied. Mirror image specified by setting data or machine signals is
effective during both reserve movement and forward return movement.
For this reason, the mirror image ON/OFF state specified by setting
data or machine signals must be maintained at the same state as forward
movement also during reserve movement and forward return
movement.