X-Carriage, Linear, Modular, 20x20 V-Slot

thingiverse

A custom X-carriage is mounted on a Linear MGN9 rail beneath a V-Slot 20x20 Extrusion rail. This is a simplified yet complete version of my "3-wheeled or Linear Railed Modular X-carriage (D-Bot Core_XY 3D Printer)" found at https://www.thingiverse.com/thing:2206664. It features all the same modules for attaching the E3Dv6, Cyclops, and Chimera with bowden tubes or Nimbles. The Diamond mount is specifically designed for bowden tubes only. The fan ducts provide 2-sided cooling of the print, placed as close to the hot ends as possible. This X-carriage originated from spauda01's D-Box, which utilizes a 20x40 V-Slot rail. Since I don't use leadscrews, as seen in my "Bed_Hoist" (https://www.thingiverse.com/thing:2846764), Version 2 coming soon, I was able to utilize its lower middle "K"-rail, shortened to the 488mm of that "R"-rail. I created a Y-Carriage_for_20x20_X-Rail by remixing and combining it with NickRimmer's "3-wheeled Y guide (Re-D-Bot)" found at www.thingiverse.com/thing:1930200, similar to my previous project "3-wheeled Y guide goes linear" at www.thingiverse.com/thing:2701748. The original Y-Guides, H-Bar_Ends, or whatever they are called for the 20x40 rail can still be used, I believe, and did for a short while, as I don't think losing a nut has much impact compared to good belt tension adjustment. However, a purpose-made Y-Carriage_for_20x20_X-Rail cannot hurt. If someone wants to keep using the 20x40 rail with this design, I could adjust the plates accordingly, but I think the entire thing would be less stable with that extra weight swaying back and forth. Let me know. A 400mm MGN9 rail is used along with an MGN9H block closer to the hot end, or you can check out faekie's remix of a Dual MGN9C bracket for modular 2020 D-Bot X-carriage at https://www.thingiverse.com/thing:3364172. There are no wheels on this design. Two versions of the rear plate, a mount for the linear MGN9 rail, and two simple support plates are included. The endstops had to be adapted for this design, and I simplified the mounts for the endstop switches (both microswitches and electro-mechanical microswitches), though the old ones can still be used. The modularity means that a nice BOM cannot be provided, as it all depends on the chosen configuration. Instead, I made a "Notes_on_Howto_What.pdf" where you can find all the details. With this design, it becomes especially useful to lower the upper front rail (N in spauda01's manual) to just below the bed in Z-home position for better access to hot ends and bed surface. Thanks again to spauda01, 1sPiRe, and MrArrow1961 (see "Remixed From"). Edit (19-01-19): I referred here and in Notes to faekie's remix. However, he didn't create it either, but it looks good. I like the virtual lengthening of the block using two smaller blocks. Edit (03-02-19): I pointed out my remix of a Y-Carriage for a 20x20 rail. Edit (06-02-19): ditto to the lowering of the N-rail Edit (26-03-19): small edit in Notes on support -> Notes_on_Howto_What-V1b.pdf