Hello. I will start by admitting I am completely new to the Raspberry world, but I am convinced this is the solution to a challenge I have at my business.
I own several CNC machines that can (and do) operate "lights out", without human supervision for periods of time (how long we allow them to run unattended depends on several factors including expected tool life, part tolerances, past history with the part, etc.).
The CNC machines have the capability to send a 24v signal to a signal tower (aka light pylon) to display via colored lights on the pylon whether the machine is running (light is green), or the machine is in alarm status (red light).
I would like to create a project that allows me to use those 24v signals together with a Raspberry Pi to create a device that will send me an email when a specific signal is received from a CNC machine.
For example, I would have liked to have received an email this weekend when CNC Machine # 3 went into alarm status at 9:00am on Saturday, I would have gladly jumped in the car to restart the machine, but instead had no idea the machine had stopped until a day later.
So, again let me admit my lack of knowledge specific to the Raspberry Pi, but I do have decent PC and programming background and we are more than capable of the wiring that will be necessary for a project like this.
Any suggestions, pointers, past experiences with similar projects, or other advice is GREATLY appreciated!
- a frustrated CNC owner