sheetcam.com

Posted: **Fri Jan 05, 2024 4:39 am**

Hi All

I am currently editing a GRBL post processor to run a laser. I am trying to pull in the tool type to build my code but am not having much luck. I can get the operationName with this snippet

post.Text (" /*OPERATION ", operationName, " */ \n")

The output in gcode is /*OPERATION Laser engrave, Layer 1, T18: Laser, 1.5 mm kerf, 0 mm Deep */

This will change for each tool and the layer name.
Is there a way to extract the first part of the string up to the comma so it only outputs "Laser engrave"?
I have tried several things but new to editing post processors so need some help.

Thanks

Posted: **Fri Jan 05, 2024 2:46 pm**

try this snippet, it worked for me in some test cases this morning...

Code: Select all

-- test code   
   -- match any char from begining of string to comma and return that substring
   local s = string.match ( operationName, "^.-," )   
   if s~= nil then 
      -- remove the comma at the end
      s = string.sub ( s, 1, string.len(s) - 1 )
      post.Text ( s, "\n" )
   else 
      post.Text ( "no comma found \n" )
   end

SC post processors are written in a language named Lua, here is the reference doc: https://www.lua.org/manual/5.1/manual.html#5.4
Happy coding

Posted: **Fri Jan 05, 2024 2:56 pm**

That is exactly what I was looking for

thanks

Posted: **Fri Jan 05, 2024 3:40 pm**

There should be a built in variable for the tool name. Not sure what it's called. Look at the variable monitor in SheetCam and you should see it.

sheetcam.com

GRBL Laser Post Processor

GRBL Laser Post Processor

Re: GRBL Laser Post Processor

Re: GRBL Laser Post Processor

Re: GRBL Laser Post Processor