Using Python with FANUC FOCAS (FANUC Open CNC API Specifications) allows you to collect real-time data, monitor machine status, and even send commands to CNC controllers. Since the official FOCAS libraries are written in C, Python implementation typically involves using to bridge the DLL files. 1. Prerequisites and Setup
Using Python with Fanuc FOCAS via ctypes is a powerful way to bridge the gap between CNC machinery and modern IT infrastructure. It allows for:
Wrapping the raw C DLLs ( fwlib32.dll or Fwlib64.dll ) directly in your code. fanuc focas python
The general workflow involves loading the DLL, establishing a connection to get a "handle," and then calling specific functions using that handle. Step 1: Load the Library and Define Structures
: The FOCAS software option must be enabled on your CNC controller. Network Setup : Connect the CNC and your PC via an Ethernet cable. Using Python with FANUC FOCAS (FANUC Open CNC
By logging spindle load over time, Python can detect a slow increase in friction (e.g., a worn bearing) before the machine alarms out.
To use a wrapper (if available/compatible): Prerequisites and Setup Using Python with Fanuc FOCAS
: Every subsequent function call requires you to pass this specific handle so the controller knows which session is requesting data.
from pyfanuc import FocasController # Connect to the FANUC CNC using its IP address # Default port is 8193 controller = FocasController("192.168.1.100") # Use a context manager to ensure safe connection handling with controller: # Read Actual Position of Axis 1 (X) axis_position = controller.read_axis(1, 0) print(f"Axis 1 Position: axis_position") # Read Macro Variable #100 macro_100 = controller.read_macro(100) print(f"Macro #100: macro_100") Use code with caution. Method 2: Accessing Low-Level Functions (Advanced)
: Reads actual position, speed, and load of axes pyfanuc position.