CHAPTER 2 MACHINE OPERATIONS
6. Operation Switch Functions and Other Functions
II
– 46
6.20 Tool retract return
(1) Outline
Due to tool breakage or temporary monitoring, the tool is manually retracted after the machine
program is interrupted by feed hold. This function allows the machine to approach the interruption
point via the transit point that was designated as the automatic start point and restart the
machining, after the workpiece is checked or the tool is changed.
Up to two transit points can be designated in the retract path.
After the tool is changed, the compensation amount cannot be changed.
(2) Retracting
method
(a) Designating the interruption point (return position)
The interruption point is designated by applying feed hold or single block stop during
automatic operation, and then turning the transit point switch ON. At this time, when the NC
completes recognition of the interruption point, the evasion return mode will be entered.
(b) Retracting methods
Retracting is carried out manually by changing to the manual mode (handle, JOG, JOG rapid
traverse). At this time, the transit point for designating the return path can be designated.
Retracting is also possible by automatic operation handle interrupt.
(c) Designating the transit point
Two transit points can be designated. To designate, move to the transit point with the manual
mode, and then turn ON the transit point switch to memorize it.
The transit point 1 (#1) is the point designated first after interruption, and the transit point 2
(#2) is the point designated last. Stop all axes before designating the transit points. (The
transit points will not be designated unless all axes are stopped.)
(d) Example of retracting operation
Apply feed hold or single block stop
during automatic operation.
Designate the interruption point by turning
the transit point switch ON.
The retract return mode (X602) will be
entered when the NC recognizes the
interruption point.
Move to transit point #1 with the manual
mode (JOG, handle, step).
Turn the transit point switch (Y78D) ON.
Transit point #1 will be memorized.
The transit point recognition complete
signal (X61F) will turn ON.
Move to transit point #2 with the manual
mode (JOG, handle, step).
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