Elekmakers A3 freeze

My Elekmakers A3 freeze at a random point, while laser stay on which ruin the work piece of course. Once it start happening, I couldn’t complete a single piece.

grbl version was 0.9 so I followed the instructions I could find (https://www.3dtek.xyz/2018/02/14/updating-grbl-firmware/) and updated it. Same thing…

ISince I was using relativity old computer, I took my work DELL XPS as I thought it might be slow computer hardware or some port issue. Same thing.

Any idea what to look for?

Problems was down to low quality USB cable that came with the unit.

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