Before installing any Python library, you need the official FOCAS library files from FANUC. These are typically provided in the FANUC FOCAS SDK, which requires a license or partnership with FANUC. The key library files are:
: When data acquisition is complete, the script explicitly calls a free function ( cnc_freelibhnd ) to release the slot on the controller. 2. Setting Up Your Environment
: Reads actual position, speed, and load of axes pyfanuc position. fanuc focas python
pip install -e git+https://github.com/tonejca/pyfwlib.git@pyfanucable#egg=fwlipy
: A free, open-source library that implements the FOCAS protocol. It allows for reading user-defined macro variables and axis data (positions, speeds, loads). Before installing any Python library, you need the
: It provides access to almost all internal CNC information, including machine health, part counts, macro variables, and spindle status. Connectivity : It typically operates over or High-Speed Serial Bus (HSSB). Customization : Developers use it to build tailored Windows applications that automate reporting or adjust operations in real-time. www.robustel.store Implementing FOCAS in Python
class POSITION_DATA(ctypes.Structure): _fields_ = [ ("name", ctypes.c_char), ("type", ctypes.c_char), ("value", ctypes.c_long) # Value is usually returned as an integer multiplied by 1000 or 10000 ] class ODBPOS(ctypes.Structure): _fields_ = [ ("dat", POSITION_DATA * 4) # Assuming up to 4 axes (X, Y, Z, A) ] def read_axis_positions(handle): pos_structure = ODBPOS() data_type = 0 # 0 reads absolute position, 1 reads machine position num_axes = ctypes.c_short(4) # Number of axes to read result = focas.cnc_rdposition(handle, data_type, ctypes.byref(num_axes), ctypes.byref(pos_structure)) if result == 0: for i in range(num_axes.value): axis_name = pos_structure.dat[i].name.decode('utf-8') # Convert raw integer value to actual decimal mm/inch actual_value = pos_structure.dat[i].value / 10000.0 print(f"Axis axis_name: actual_value") else: print(f"Failed to read positions. Error: result") Use code with caution. Advanced Use Cases: Moving Beyond Basics It allows for reading user-defined macro variables and
| Package | Method | Ease | Features | |---------|--------|------|----------| | fanuc-focas (pip) | ctypes wrapper | ⭐⭐⭐⭐⭐ | Limited | | pyfanuc (pip) | ctypes wrapper | ⭐⭐⭐⭐ | Moderate | | Custom ctypes | Direct | ⭐⭐ | Full control |
0;1052;0;2cb; 0;908;0;f1; 0;88;0;98; 0;279;0;17a; 0;1247;0;b19;
The you want to track (e.g., cycle times, active macro variables, alarms). Share public link