Openings in object

Lightburn is used.
machine belongs to someone else
how can these openings be caused.
speed is 500
power 20

500 what? 500 is not a speed. 500 light years a second, 500 KPH or 500 mm/min are speeds as they provide all required data points to show speed as a distance traveled calculated over some time interval.

i can’t find GRBL -M3???

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