Chip shortage GRBL controller

Controller works without any big issues. I have few ideas for improvement, but for now work is finish.

Thinks to do to make this project in close state:

• make some distance to tighten PCBs with deflection and prevent any shorts [DONE]
• remove all unused pin header from nucleo [DONE]
• clean PCBs after soldering and coat with something to prevent short

And the most important:

• intall in machine and make it all works. [DONE]

All axis are working, but I have only one controller on hand:

At the beginning I want to mount PCB, screwing it directly. But because of quite big size I change my mind and make aluminum L-bracket to fix PCBs.

To have better contact with ground in electric cabinet I decide to make long screws (piece of aluminum with threaded holes and glued hex screw on one side and piece of threaded rod on other)