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A bit of machining content on the programmable coolant nozzle.
The angle is calculated (simple arc tan) for each tool based on the tool length, and if diameter is larger than 20mm it is also taken into account. If the tool type is hole making, then a sweep is set for a few degrees. The only gcode used in the main program is m7. This angle/sweep command is sent from linuxcnc via serial interface to an esp32 which is connected to an rc servo via ttl to rs485 converters so as to withstand the long line of transmission without interferences.
CNC LinuxCNC RF45 ZX45, Renishaw Probe, Two ATC Umbrella style