I finally performed my first cut other than the final sledge.
I modeled a shape in fusion 360, did the cam in fusion and started the job.
While cutting the first pass the Arduino power supply died (maker made).
I ordered a power supply transformer on Amazon, since last shipping from maker made took 5 weeks. Same specs: 12v 5a center positive.
I restarted the job and finished the cut.
Now, the cut line looks really bad. Wawy, irregular. Especially in the horizontal lines.
Could this be an issue due to the new power supply? Position of the cut (top of the working space)? Calibration? Or maybe just chains tensioning/sledge dragging?