Why this matters

If corners burn darker or Error:20 mentions M4, verify GRBL version/device type and $32 before editing generated G-code.

How to think about it

Define the result you actually need, then confirm the active machine profile, units and operating mode before changing parameters.

Practical workflow

  1. Define the result you actually need, then confirm the active machine profile, units and operating mode before changing parameters.
  2. Change one meaningful variable at a time and use Preview/Frame or offline analysis before running a real job.
  3. If the issue repeats, keep evidence: Console output, a G-code sample, the exact settings used and material context. Evidence makes troubleshooting reproducible.

If the result is wrong

If corners burn darker or Error:20 mentions M4, verify GRBL version/device type and $32 before editing generated G-code.