Macro to except a String Variable

[ger21]

I think it already Excepts the string. But you probably want it to Accept it.

[dezsoe]

I've just uploaded a macro in the TOOLBOX, you can get ideas how to pass a string to a macro.

[dezsoe]

I've just shown you the way. Pass it through a remark:

Code: Select all

M1000 (this all text will go to variable msg)


And use this macro M1000:

Code: Select all

// ================================================================================================

string myLine = exec.Getcurrgcodelinetext();
string msg = "";
int posF = 0;
int posL = 0;

if (myLine != null)
{
  posF = myLine.IndexOf("(");
  if (posF != -1)
  {
    posL = myLine.LastIndexOf(")");
    if (posL > posF)
      msg = myLine.Substring(posF + 1, posL - posF - 1);
  }
}

if (msg != "")
{
  // --- Now msg contains the full text of the remark between ( and ) ---
  // WRITE YOUR CODE HERE
}

// ================================================================================================


[dezsoe]

Hi Terry,
There's no way in g-code to handle strings. The whole standard and structure of the g-code is against that. It doesn't depend on tha way the parameters are passed, so Fanuc (or LinuxCNC) #1..#26 (..#30, ..#33) will also not solve the problem. It's not a hard thing to develop the string management, but it is not the standard, so it is not g-code. You can modify your car to be able to wash your clothes, technically it's not impossible, but you don't want it, because a car is not for washing, but travelling.

[dezsoe]

HI Dezsoe, LinuxCNC has been handling strings for a long time now as are other controllers.

Before I sent my last post I tried to find some info on other controllers. In the LinuxCNC handbook I found:

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.

I don't know LinuxCNC, I used it only for some weeks when I started to build my first machine some years ago. I can't decide who's right. Could you please show some sample code? For now, I'm really interested in this.

[dezsoe]

Well, they are very awful... But! They are not string types. They are floating point variables as the #nnn-s, just have some awful name instead of the #nnn form.

[dezsoe]

The command is calling a NAME(string) then it refers to a number internally

<holediam> = 25.33

Also I believe they used teh same approach with M98

M98<BoltCircle> L1 Calls a remote sub named BoltCircle

A lot of controls use strings for various features.

OK, these are only references to numeric variables (or constants), not string type variables. The string type is not g-code.

I think I give it up now, because I see that I cannot convince you of this.