BTT SKR v2 Case with MOSFET Case and PS Brackets Kit

Description

This started out as a remix of a SKR 1.3/1.4 rail mount enclosure for my new SKR2 board. But it seems to be gone now, so I can't attribute it. Of course, scope creep came into play. First it was not liking a box taking up enclosure/table space on the left side of the printer. Then it was a request for a MOSFET box of some kind (for two mosfets, of course). And all that meant conflict with current power supply location on my Longer LK5 Pro printer. The end result is the full printer rehab kit you find here. I recommend this mount for a TFT35 v3.0 if you have that: https://www.thingiverse.com/thing:4576251 The main differences between SKR v1.3 and v1.4 and the SKR v2, from a case design perspective, is the addition of a vertical USB port, and relocation of the power, bed heater, and hotend heater connections. For this reason, use of this case for a v1.3 or v1.4 motherboard will not work very well. In the original design, and my first attempt, the case fan was on the side, which obstructed access to one of the mounting points if a fan larger than 4010 was used. I use and recommend a 4020 fan for this case and motherboard, so I moved the fan to the lid. I also shifted the board position slightly for better SD card access, increased vent hole sizes, added two round cable bundle ports, one on each side, and moved the mounting holes from bottom of case to the top, a more logical location for most printers. I think my mods provide a cleaner, better ventilated case. The current v3.2 SKR2 case is 138mm wide, and sized to fit within the entire space available in the front of a printer with a 300mm X axis bed. If your printer frame does not have that much space available, sorry, but you will be limited to side rail mounting. Pay close attention to the support blocker diagram below for the parts with vents. If you don't, print times are way longer and support removal is a lot more difficult. Planning: This modular design plan of this kit offers several options as to layout of the boxes and power supply. The SKR2 mainboard box and mosfet box can hang anywhere there is a rail slot and adequate space available. For best space utilization and access, most people would probably want them up front, space allowing, with the mainboard box on the left, close to where the main cable bundle needs to go to the X axis rail and hotend. This also reduces cable distance to the TFT screen, usually mounted on the front left corner leg, and provides best access to the SD and USB ports on the mainboard. After that, the decision is what to do with the power supply. Personally, given where mine is now, facing the rear on the right side, I hate having to reach over the Y motor to get to the power cord and switch. So I have relocated it to the front right side, with the switch facing forward, for easier access. For this location, or for its original right rear facing orientation, print the "A" pair of power supply brackets. If your preference is to have the PSU on the left side, but power cord and switch facing to the rear, also print the "A" pair of power supply brackets. For any other locations, print the "B" set. If you don't like your initial choice, you can always print the other pair of brackets later. And if you just want to reorient your power supply, and don't need the SKR2 or mosfet boxes, just print whichever set of power supply brackets you want. Regardless of which position you choose, print the PS Bracket Middle. It works with any PSU location. Graphics included in the Post Printing section show how these parts all fit together on my Longer LK5 Pro. How you do your printer may be different. Send me a comment about your chosen configuration. Updates: 2021-12-02: - Major redesigned of the SKR2 case for side or optional side or rear mount. It now hangs down from the rail it is mounted to, reducing rail space needed. - Reduced wall thicknesses and bottom thickness for faster printing and less materials. - Added optional mount point for DB25 breakout box for replacing extruder wire bundle with HD15 cable. More on that project later. - Added an optional dual MOSFET box. This box mirrors the motherboard case as to external form factor and mounting. This box uses the same lid as the SKR2 case. It definitely works for the mosfets I have, and It should work with most of the mosfets I found on Amazon, the ones that are 50x60mm overall size. 2021-12-04: - Added new power supply brackets front and rear for space and location compatibility with the new mosfet box. (Untested, printing now). The front bracket also holds the power cord input and on/off switch, which as a result are moved to the front of the printer. No more reaching around the back. 2021-12-05: - Added mount points to the PS front bracket and the dual mosfet box for mini RJ45 breakout boards to get 24v power from front of printer to back via a standard Cat6 patch cable. - Tweaks to PS front and back brackets for better PS fit and positioning. 2021-12-06: - Added vents to PS Front Bracket. - Added RJ45 breakout mount to SKR2 case - Added a hole plugs part, to cover any unused cable bundle holes in the boxes. - Added "A" and "B" versions of the power supply brackets. See discussion above. 2021-12-31: - Replaced SKR2 v3.1 case with a larger, v3.2 version, with better interior space, including tie down points for wires, better ventilation, and allow a 4010 fan to be mounted inside instead of on top. A 4020 fan, if you choose to use one, should probably still mounted on top. The rear RJ45 opening has been replaced by a round cable bundle port in this version. - Added a v3.2 size lid for the new SKR2 case. The v3.1 lid is still there for the MOSFET box, which has not changed. One implementation of the completed project design concept is provided as a stl so it can be viewed in 3d to get a feel for potential part locations and overall layout. All parts are shown. Obviously you can't print it! This is a work in progress. Things may change as I get more experience putting it all in place and using it.

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