IF statement doesn't work

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27 Jun 2014 05:58 #48262 by lewac
yeah I need this and it gives the following error in 2.5.4 on an EMPTY file except for a test statement such as shown in the snippet...




IF [X EQ 1] THEN Y = 2

or you can try this:

IF [X EQ 1] Y = 2
ENDIF

or this:

IF [X EQ 1] THEN Y = 2
ENDIF

The error is totally unrelated to the statement... looks like a parsing issue. note that this parser is REALLY lax in picking up bad syntax as well. don't have the time to delve through the source so looks like a reload of the OS to return to an earlier version...
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27 Jun 2014 07:09 #48263 by alan_3301
Replied by alan_3301 on topic IF statement doesn't work
did that work on an earlier version?

I think if statements have to be in a O subroutine.

also I don't think axis letters are read as variables, you need to use the parameter that matches the axis.
and instead of Y=2 it should be g1 y2.

as far as I know, I may be wrong.

linuxcnc.org/docs/html/gcode/o-code.html#sec:subroutines

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27 Jun 2014 14:42 #48264 by Rick G

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27 Jun 2014 19:06 #48270 by andypugh
Replied by andypugh on topic IF statement doesn't work

yeah I need this and it gives the following error in 2.5.4 on an EMPTY file except for a test statement such as shown in the snippet..


IF / ENDIF statements need O-numbers so that the parser can match beginnings and ends.

O100 IF {1 LT 2]
O101 IF [3 GT 4]
...
O101 ENDIF
O100 ELSE
...
O100 ENDIF

There is no THEN in G-code.

You can not assign values to XYZABCUVW. These are commands not variables.

Your sample code would never have worked in any G-code interpreter.

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