unary operations in linux

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foam man
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22 Sep 2022 03:19 #252548 by foam man

unary operations in linux was created by foam man

hi when i enter the following line into linux it says unary operation can be used

#<flange>= x2 y.5

i think i understand that its telling me i can use a single command, but which one?

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Aciera
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22 Sep 2022 06:55 #252554 by Aciera

Replied by Aciera on topic unary operations in linux

I'm not sure what you are trying to do there but parameters can only be floating point values.

The only value type supported by parameters is floating-point; there are no string, boolean or integer types in G-code like in other programming languages. However, logic expressions can be formulated with boolean operators ( AND, OR, XOR, and the comparison operators EQ,NE,GT,GE,LT,LE), and the MOD, ROUND, FUP and FIX operators support integer arithmetic.

linuxcnc.org/docs/html/gcode/overview.html#_parameters

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Aciera
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22 Sep 2022 07:00 #252555 by Aciera

Replied by Aciera on topic unary operations in linux

The message you are getting about unary operation is just an error message from the interpreter when it encounters an unexpected line of gcode.

The following user(s) said Thank You: tommylight

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foam man
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24 Sep 2022 02:39 #252649 by foam man

Replied by foam man on topic unary operations in linux

ok makes sense

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foam man
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24 Sep 2022 02:41 #252650 by foam man

Replied by foam man on topic unary operations in linux

what would be the best way to move 2 directions (but not simultaneously) with a single command

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MaHa
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24 Sep 2022 16:41 #252668 by MaHa

Replied by MaHa on topic unary operations in linux

as a 'single command' you can call a subroutine

o<flange> call [2] [0.5]

and place the subroutine with toolpath at the top of mainprogram.

o<flange> sub
G1 X#1 Y#2
o<flange> endsub

another exampl

o<flange> sub
G1 X#1
      Y#2
o<flange> endsub

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foam man
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27 Sep 2022 02:30 #252824 by foam man

Replied by foam man on topic unary operations in linux

honestly i.m very new to cnc programing and whatever you have written up top is probably over my head, but can you elaborate just a little bit about excactly what those commands will do
thanks

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Aciera
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27 Sep 2022 07:23 #252833 by Aciera

Replied by Aciera on topic unary operations in linux

Maybe have a look at the O code documentation:
linuxcnc.org/docs/html/gcode/o-code.html

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Todd Zuercher
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28 Sep 2022 12:54 #252934 by Todd Zuercher

Replied by Todd Zuercher on topic unary operations in linux

Technically, it is not possible to make two separate moves with a single command.

What MaHa suggests is to create a small sub program that contains the 2 separate moves you are requesting, then you could use a single command to call that subprogram. The subprogram uses two variables for the distance of the separate X and Y moves that you have to specify the value of when you call the subprogram.

(or you can simply write the two separate moves explicitly in your g-code.)

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