Ender 3 Pro PSU Cover (with space for relay & buck converter)

Last crawled date: 4 years, 2 months ago

This is a remix of mfau's "Ender 3 PSU cover with USB" fitting the Ender 3 Pro power supply (Meanwell LRS-350-24).
I wanted to fit this cover on my Ender 3 Pro which power supply is thinner compared to the normal Ender 3. I also wanted to have a relay (controlled by a Raspberry Pi) and a buck converter (to power the relay and the Raspberry Pi) directly fitted into this. The cover consists of two parts: the base and the side cover which is bolt-on.
Features/Modifications:
Power socket on the rear instead of the side. The switch can be either on the in or outside.
Divider between the mains AC section and the low voltage DC section of the cover.
Mount for an relay and a DC/DC step down converter.
Cable opening moved to the side with a little guide/cover instead of underneath.
Ledge on the inside to prevent the PSU from falling down into the cover and potentially shorting any wires.
Removeable side cover to provide easy access to the PSU terminals and the relay or buck converter.
Included are two STL files (base and side cover separated), STEP files (one including the used references models) and the Fusion Project (.F3Z). Feel free to remix this thing for your own needs.
Required Hardware
to fit the cover to the PSU you can use the three original M4 bolts
the side cover, relay and buck converter are bolt-on using self-tapping screws (DIN 7981 2.9x6.5mm). The screw holes have a diameter of 2.75mm and are 5mm deep and designed so that the screws cut the threads.
the relay I've used and for which the screw holes (34.3x66.5mm) are fitted: 1CH 30A relay module
the buck coverter I've used and for which the screw holes (two diagonal holes 34mm apart) are fitted: DC-DC Step Down Buck Converter LM2596
To remove the original PSU cover and install this one, you need to access the PSU terminals. BE SURE TO REMOVE THE POWER TAIL BEFORE DOING ANYTHING!