Mean Well LRS 350 housing with mains relay

thingiverse

I was searching for a MeanWell LRS 350 housing for my Ender 3. My top priority upgrades to the Ender 3 are electrical and fire safety enhancements. One of the essential plugins I want to use with Octoprint is the PSU Control combined with Temperature Control. Many YouTube how-to videos demonstrate attaching a relay to the 24V supply side of the PSUs, but in each case they fit a relay switch that cannot handle the maximum potential current draw on that side of the system. My country has a 240V supply, and as such I safeguard the power supply with a 5 Amp fuse. This means that I can use an affordable 5Amp mains relay switch on the mains side of the PSU, controlled by my Octopi. I have remixed the original design to: * Eliminate the USB port (I require an external power source for the Pi as I am switching the live) * Increase the shoulder height on the air flow slot side as the previous design had gaps in between the housing and the PSU * Remove the voltage out regulator access hole (I'm not sure why you'd want to access this on the fly?) * Change the rectangular cable slot to a 20mm recessed circular cable slot that fits a 20mm cable gland * Add mounting holes for a 5Amp 230V relay board * Seal off the bottom screw hole. This metal part would have a direct route into the mains enclosure on the previous design and isn't earthed. It is now double insulated. I used supports at 50 degrees. They were easy enough to remove. This thing: https://www.thingiverse.com/thing:3313417 may come in handy for attaching it to the extruded aluminum frame. If there's any interest, I can do a tutorial on mains switching using the Octopi.