LowRider 3 CNC - control box case for BTT SKR Pro 1.2 board and a BTT TFT35 E3 touchscreen (v1.2)

Quick heads up: 

These remix designs were somewhat “intended” for the case being positioned on the X-max end (right side) of the LR3 gantry. If you are planning for placing it on the X-min (left side), then the only concern with simply sliding the case to the other side is that positions the cooling fan intake holes toward where the cuts happen instead of facing outward. Perhaps the easiest work around is to flip the fans so they pull air out of the case instead of pushing air into the case. Previously I had mistakenly suggested simply mirroring the printer parts, but I had not actually done it, and when someone tried, they pointed out that mirroring does not handle reorienting the openings on the lid for the ports on the PCB(s). Sorry for any confusion.

Note: in addition to this revision, there are now three other editions of this:

• One that accommodates non-E3 TFTs (but only looks right while facing toward the X axis): LowRider 3 CNC - control box case for BTT SKR Pro 1.2 board and a BTT TFT35 (NON-E3) touchscreen (v1.3.1)
• Another one that is longer, and modified specifically to accommodate adding a Raspberry Pi 4b housed in with the SKR Pro 1.2 mainboard: LowRider 3 CNC - control box case for Raspberry Pi 4b, BTT SKR Pro 1.2 board, and BTT TFT35 E3 touchscreen (v1.3.3)
• And yet another one that is shorter (180mm in length) to accommodate smaller 3D printers, such as the Prusa Mini: LowRider 3 CNC - control box case for BTT SKR Pro 1.2 board and a BTT TFT35 E3 touchscreen (v1.3.4) SHORTER VERSION (180mm) FOR SHORTER PRINTERS

This remix has changes to the lid and the TFT holder for two purposes: 

1. So that a single set of prints can have the TFT facing either way: out toward X or out toward Y.
2. New opening in side for access / use of USB port. 

Under the previous revision, you could choose to print either the “A” or “B” sets of the lid and TFT holder, with the “A” set facing the TFT toward the X axis, or the “B” set facing it towards the “Y” axis. In this remix, you can print once and know that it can go either way.

I made this remix primarily because after I switched my LowRider's axes (swapping X and Y with each other), I wanted to have the TFT facing my new X (which was the old Y) and yet I liked the look of the other, more stylish TFT holder. So this edition can “switch hit” to “bat lefty” if needed. 

UPDATE August 15, 2022 - USB port opening

New opening in the side of the TFT holder for access / use of USB port.

UPDATE July 7, 2022 - “Low Fat” Base option

What’s this “Low Fat” thing? This is my version of a brainchild of aaron GitHub on the V1 Engineering forum. It’s a more efficient version of the base with some “fat” trimmed off. It maintains thickness and strength where needed, but saves 33% of the plastic and shaves 25% off the print time. It also has a new version of hanging bracket, inspired by the work of Dan @SupraGuy on the V1 Engineering forum. This hanging bracket is split in two so it can accommodate your temporary struts while you’re starting out with your LowRider v3, and then graduate to your permanent struts once you get them cut and installed. I’m offering both the original base (v 1.2) and the new one (1.3.2) so you get to choose. And both are available for 1/8" thick struts or ¼" thick struts.

Other details remain pretty much the same, so below is a copy and paste from before, with minor tweaks:

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Gorgeous printable case for your LowRider v3 CNC, if you're using an SKR Pro 1.2 board and a BTT TFT35 E3 touchscreen. Offers some new features (see below).

Many thanks to Ryan at V1 Engineering for his design genius and gracious generosity in sharing his work with us all. For those whose LowRider v3 MPCNC has or will have a BTT SKR Pro 1.2 main board and a BTT TFT35-E3 v3 touchscreen, I offer my remix of Ryan's blank control box case CAD file. This case may fit other SKR boards, depending on dimensions. Check before printing. It may also be remixed to suit other SKR boards.

Features: 

• NEW (as of August 15, 2022) USB port opening. See above.
• NEW (as of July 7, 2022) “Low Fat” Base option. See above.
• NEW (as of June 21, 2022) support facing the TFT toward X axis or Y axis without having to reprint any additional parts. Under the previous revision, you could choose to print either the “A” or “B” sets of the lid and TFT holder, with “A” facing the TFT toward the X, or “B” facing it towards the “Y.” In this one, you can print once and know that it can go either way.
• Support for either 1/8" thick struts or ¼" thick struts. The original base has a “mounting” rail on the back that is sized for struts cut from 1/8" thick hardboard. What about those who cut their struts from ¼" plywood or ¼" hardboard? There is now an alternate base for that too.  
• Support for cooling fans — designed for two 40x40x10 fans. I use these quiet fans from Noctua: NF-A4x10 FLX, Premium Quiet Fan, 3-Pin (40x10mm, Brown)
• Snap in place feature — this remix keeps the original screw hole from Ryan's design, which allows the lid to be fastened in place on the base, but my design also includes a new snap in place feature. I love it, and have not bothered with a screw.
• Access ports — for the SKR's USB ports and mini-SD card slot, and for the TFT touchscreen's SD card slot.
• DC power connector port — the base has an internal “sled” to hold the female power connector, and one of the printable parts is a little bar to screw in and clamp the connector in place. My LowRider kit from V1 Engineering came with one of the connectors. If you need more, these are available on Amazon.  
• Ample room for wiring and power connections — with options for running wires in from below the board or above it. I recommend below, as it minimizes chances of something getting tugged loose while sliding the lid in or out. See video (above).

Details of my upgrade of a LowRider v2 to v3 are available here on the V1 forum.

Print and Assembly:

• Print the parts as oriented. No supports needed, assuming your printer is capable of a decent amount of bridging.
• Use four (4) M3 x 8mm screws to mount the TFT to the TFT holder.
• Use four (4) M3 x 8mm screws to mount the TFT holder to the lid. 
• Use two (2) M3 x 8mm screws to attach the clamp that holds the DC connector in place.
• Use eight (8) M3 screws of an appropriate length to attach your two cooling fans.

Change log:

• June 24, 2022, 7:00 am (EST): updated both the lid and the TFT holder files to get closer to perfection on fitment and accommodation of the TFT, fitment and function of the reset button, and positioning and function of the SD card slot.
• July 7, 2022, 9:25 pm (EST): add “low fat” versions of the base for both 1/8" thick struts and 1/4" thick struts. The low fat versions save 33% of the plastic and shave 25% off the printing time.  

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Various LowRider 3 CNC remixes:

• LowRider 3 CNC Collection

View all my models and remixes on Printables:

• Design8Studio 3D models

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