Yes, that is the start point
All plasma cutters create a small crater when starting a cut, it takes a moment to blast through the material.
That can be moved away from the final outline by adding a
lead-in starting somewhere away from the finished edge (red circle) then sweeping into the finished edge cut, so that the torch is moving at the right speed and direction when it reaches and starts cutting the finished edge.
You can see the larger heat zone around the larger crater in the upper cut in the photo. That means the torch paused there longer or simply burned out a bigger hole than in the lower cut. That could be due to torch power settings, pierce height, pierce delay time, and or arc ok signal timing. Which depends on the machine, whether it has torch height control, arc sensing, some fixed pierce delay time, and or a slow computer.
Using a lead-in, and possibly a lead-out should all but eliminate start point imperfections. Otherwise, cratering is unavoidable, and the amount of cratering varies with torch pierce power, height, and timing (and even with air pressure and grounding and so forth).
And for best results the cut direction should be clockwise on those outside cuts. Plasma torches cut cleaner on the right side due to the way the plasma swirls clockwise.
And you can also move the start point to a less conspicuous location.
With plasmacam, you have to use their software, and have the necessary upgrades, to implement lead-ins, but then it's generally pretty easy to add lead-ins, especially when there's only one required. It is possible to add them manually without special software (after kerf compensation).
