@johnbrooker is right about hotspots. I did a series of experiments in this vein and posted here:
https://community.glowforge.com/t/super-manual-engraving/15965
@johnbrooker is right about hotspots. I did a series of experiments in this vein and posted here:
https://community.glowforge.com/t/super-manual-engraving/15965