So from time to time bad things can happen with the laser, usually in the form of things burning and/or breaking. These past couple of weeks I’ve been building a box to monitor various status conditions of the laser. Initially this will be coolant flow rate and temperature, but could eventually include an air flow sensor, tube temperature, power consumption, etc. Basically this box will be an independent system for checking the overall health of the laser system, and signal to the user when things look wonky. Possible actions include audible alarm, triggering an estop, or praying to a preprogrammed god of your choice.
Anyhow, here are some progress photos:
The box is laser cut hardboard (designed in Inkscape). The charring gives a smart border. Inside is an Arduino, Nokia 3310 LCD screen and some connectors for interfacing with sensors. The temperature sensor is a simple thermistor, and the flow sensor is a FS-4400H. I’ll be posting source code, schematics and designs when I’m closer to finishing.