Fanuc Focas Python May 2026

The combination of Fanuc FOCAS and Python democratizes factory data. You no longer need a $20,000 MES license to know why your machine is down. With a $50 industrial PC (Raspberry Pi running 32-bit OS) and the Python script above, you can start visualizing your shop floor in real-time.

Next Steps:

Start small—just read the current program number and spindle load. Once stable, expand to full data lakes and dashboards. The era of the "Black Box CNC" is over; Python is the key.

The open-source library pyfanuc (available via pip install pyfanuc) wraps the native FOCAS DLLs using ctypes. It provides a Pythonic interface. fanuc focas python

Basic Example:

from pyfanuc import FocasConnection
cnc = FocasConnection(host="192.168.1.100", port=8193)
cnc.connect()
pip install fanuc-focas

try:
while True:
# Get dynamic data (spindle load, feed, speed)
dyn_data = focas.cnc_rddynamic(handle, 0)  # 0 = current block The combination of Fanuc FOCAS and Python democratizes
    # Get machine status (Running, Alarm, Stop, etc.)
    status = focas.cnc_statinfo(handle)
print(f"Status: status.status | Spindle Load: dyn_data.spindle_load% | Feed: dyn_data.feedrate")
time.sleep(2)

except KeyboardInterrupt:
print("Monitoring stopped.")
finally:
focas.cnc_freelibhndl(handle)

Note: Actual function names and parameter structures vary by package version. Always consult your specific wrapper’s documentation. Start small—just read the current program number and

Fanuc FOCAS (Fanuc Open CNC API Specifications) is the industry-standard library for communicating with Fanuc CNC machines. Using Python to interface with FOCAS allows for rapid development of data collection tools, dashboards, and automation scripts.

# Get CNC status (0=Standby, 1=Running, 2=Alarm)
status = ctypes.c_short()
ret = focas.cnc_statinfo(handle, ctypes.byref(status))
if ret == 0:
status_map = 0: "Standby", 1: "Running", 2: "Alarm"
print(f"Status: status_map.get(status.value, 'Unknown')")

Let’s write a Python script to connect to the CNC and read the operation status.

import ctypes
from ctypes import wintypes
import time