I'm testing my new machine and learning about it. I generated my toolpaths using Qcad and exported a gcode file. Then I opened the file with Open builds control software. Everything seems normal until I run job. I get an error message Grbl Error: 20 - Unsupported or invalid g-code command found in block [ N30 T1 M6 ]. It shows up on line 3. If I delete the command, the job will run. I did a test without a bit to see it's travel. It appears to be cutting at a much reduced size scale. For example, a 2" square is cut less than .5". I used the G-code (Offset) [in"]setting in my Qcad/cam. I tried other settings also. I tried a 2" square to see if a basic shape would work. No luck. What's the deal?
T (tool change) is not a valid grbl command. Find a post processor that is for grbl. (refer to the grbl wiki for valid commands: Grbl v1.1 Commands · gnea/grbl Wiki) For the size, did your gcode have an G20 command at the beginning? If not, its cutting in mm, not inches.
I figured it out I think. I won't be able to use Qcad/CAM. looks like I have to use a program compatible with your controller.
Once. That tells the controller that all coordinates are in inch mode until a G21 command is issue in which case it switches to mm mode. Does the qcad GRBL(offset)in post not work?
I have just run gcode I created in Qcad using the GRBL inch and GRBL mm posts through OpenBuilds CONTROL without errors. What GUI are you using? Are you SURE you selected the GRBL posts, it is easy to select the generic G-code posts instead as the Qcad interface is not very clear. Also note everytime you change post selection you have to recreate the toolpaths.
I'm using Carvco now instead. I like it. I still prefer to draw with Qcad but I just open my drawings with carvco and spit out the job.
