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It is important to note the exact differences between what happens during post-processing time (post-time) and what happens on the NC machine, at runtime. The following table highlights these differences.
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Block |
Post-Time |
Runtime |
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BEGINNING OF SUB: |
Called once at the beginning of subroutine definition, used to output the subroutine "header" G-code. |
Not relevant |
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Subroutine body blocks |
Called and processed once, during subroutine definition only. |
The subroutine body G-code is executed each time the subroutine is called. |
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END OF SUB: |
Called once, at the end of subroutine definition, used for optional "cleanup" work. |
Not relevant |
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SUBROUTINE CALL: |
Called multiple times, used to output the G-code that calls the subroutine on the machine. The subroutine body blocks are not executed here! |
The output G-code is executed multiple times, and calls the subroutine on the machine. |
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SUBROUTINE RETURN: |
Called immediately after each SUBROUTINE CALL block. |
In case any G-code was output in this block, it is executed after the subroutine return. |
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