milling the pcb’s

flatcam

As in my assignments, I used flatcam for preparing the gcode.

CNC3018

And again I used my CNC3018 for milling the pcb’s and that was moment where MURPHY starts with his LAW.
During the assignments, the machine does a good job, but with start milling the first final project pcb, I got terrible results.
You can see, that the traces are not uniform

after manual correction with a knife on some points, the pcb is usable and okay for the project.
But the controller pcb was absolutely unusable..

LPKF

Due to the improving COVID situation, I was able to visit the HRW Fablab, so I could use their LPKF Protomat S63.

The software of the machine is called LPKF CircuitPro PM and bundled with the machine, so I’m not able to provide a download link for it.
After opening my gerber files, the traces and the edge-cut has different colors. On the left side, we can define, which color has which function.

In the machine control panel we can set the zero point and start the job

The finished board is really not comparable with the one I milled on my machine.
But wait....what is that ????

There are some strange dots on the pcb and under a 3d Microscope I saw, that there are some strange holes milled from the lpkf.

The traces are close to cut, but they have still contact, so I used this board for the final project.
Nobody really knows, whats the problem, but it seems, that this is an issue with KiCad generated gerber files.