Fanuc Focas Python //top\\ Page

If you do not want to manually define ctypes structures, there are open-source wrappers like pyfanuc on PyPI (though maintenance varies).

Here is a complete, working script to connect to a CNC and read the current tool number and absolute position using ctypes .

By logging spindle load over time, Python can detect a slow increase in friction (e.g., a worn bearing) before the machine alarms out. fanuc focas python

finally: # Always disconnect gracefully cnc.disconnect()

def get_status(handle): odst = ODST() ret = fwlib.cnc_statinfo(ctypes.c_short(handle), ctypes.byref(odst)) If you do not want to manually define

Because the original FOCAS libraries are written in C, Python developers often use the library to "wrap" the DLL functions. Network Setup

"There is a limitation of the functions which can be used for the development, by the difference of the CNC Series, Model, Type and series and version of control software. Some functions need the proper function at the control software of the CNC even if the CNC is the latest version. Functions which cannot be used for the CNC which is owned by the customer for the purpose of the application development may exist." finally: # Always disconnect gracefully cnc

| Function | Purpose | Typical Use | |----------|---------|--------------| | cnc_allclibhndl3 | Establish connection | Initial setup | | cnc_freelibhndl | Close connection | Cleanup | | cnc_rdaxisdata | Read axis position/speed/load | Machine position tracking | | cnc_rdmacror2 | Read macro variable | Custom parameter monitoring | | cnc_exeprgname | Get executing program name | Production tracking | | cnc_rdalarm | Read alarm information | Error monitoring | | cnc_rdstatus | Read CNC status | Machine state monitoring | | cnc_rdparam | Read CNC parameter | Configuration verification | | cnc_diagnoss | Read diagnostic data | Maintenance tracking | | cnc_rdpmcrng | Read PMC signal | PLC signal monitoring |

), Python implementations typically act as a bridge or wrapper for these files. Inductive Automation Forum

import ctypes from ctypes import wintypes