Fanuc Focas Python
Fanuc FOCAS (Fanuc Open CNC API Specifications) library is the standard interface for extracting high-level operational data from Fanuc CNC controllers
--- Define necessary structures (ODS) ---
These mirror the C structures in FOCAS
class ODSYS(ctypes.Structure): fields = [("cnc_type", ctypes.c_short), ("version", ctypes.c_char * 4), ("axes", ctypes.c_short), ("series", ctypes.c_short), ("type", ctypes.c_char * 2)] fanuc focas python
A manufacturer API that allows external programs to "ask" the CNC machine for data or send specific commands without needing extra hardware like sensors. Access Methods: It communicates over (the most common method) or (High-Speed Serial Bus). Fanuc FOCAS (Fanuc Open CNC API Specifications) library
# Check your Python architecture
python -c "import platform; print(platform.architecture())"
# Output must show ('32bit', 'WindowsPE')
Example Applications
def get_spindle_load(handle, diagnostic_number=310): diag = ODBDIAG() length = ctypes.c_short() ret = fwlib.cnc_rddiagnum(ctypes.c_short(handle), diagnostic_number, 1, ctypes.byref(diag), ctypes.byref(length)) if ret == 0: return diag.data return -1.0 # Write a program file to the CNC machine cnc
To enable a Python script to talk to a Fanuc machine, the CNC must first be configured: Fanuc Focas protocol - MindSphere documentation 29 Mar 2025 —
