Geoffreyyoung lgx (#477)

* add lgx

* add new information

* adjustments

* tyop

* add LGX to top level...

* spider bracket works with trident

* add LGX models

* add LGX model

* tyop

* fix tyop

* add toc, call out Nemgra's work a bit more

* change to proper gear_ratio (thanks to @KiloQubit!)

* resolve conflicts

* fix tyop (again)

* one last tweak

printer_mods/README.md

@@ -115,6 +115,7 @@ like so:
 |  | [Bed Support Extrusions Alignment Tools](./GadgetAngel/Bed_Support_Alignment_Tools) |The bed support alignment tools will assist in helping align the "bed support extrusions" to the frame. When the alignment tools are placed in all four corners of the Voron Printer's frame the "bed support extrusions" will butt up against these tools so that you can screw the "bed support extrusions" down to the printer's frame in the correct position.|  :x: | :x: | :heavy_check_mark: |  :x: | :x: |
 | geoffreyyoung | [FYSETC SPIDER DIN Bracket](./geoffreyyoung/spider_bracket) | FYSETC SPIDER DIN Bracket | :x: | :heavy_check_mark: | :heavy_check_mark: | :x: |
 | | [Dual Rail Installation Guide](./geoffreyyoung/dual_rail_guide) | Rail installation guide that also works for the 2.4 dual rail installation | :x: | :x: | :heavy_check_mark: | :x: |
+| | [LGX Info, Links, and Models](./geoffreyyoung/lgx) | Useful information and models for using the Bondtech LGX extruder wth Afterburner| :x: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
 | GiulianoM | [Fly F407ZG Mount](./GiulianoM/FlyF407ZG) | Mount for the Fly F407ZG: https://github.com/FLYmaker/FLYF407ZG | :x: | :x: | :heavy_check_mark: | :x: |
 | Gizzle | [Ender 3 and Ender 3 Pro Switchwire Mod](./Gizzle/ender-3_(pro)_switchwire)| Mod for the Ender 3 and Ender 3 Pro, which adapts the kinematics and most other parts of the Voron Switchwire. | :x: | :x: | :x: | :heavy_check_mark: |
 | GSL12 | [Pocketwatch Nema 17](./GSL12/pocketwatch_nema17)| Extruder like Pocketwatch, but with Nema17 instead of Nema14. Maybe for V0 fork with 2020 extrusions, Nema17 and MGN9 or other printers. | :grey_question: | :grey_question: | :grey_question: |:x:|

printer_mods/geoffreyyoung/README.md

@@ -6,6 +6,7 @@
 
 * [Dual Rail Installation Guide](./dual_rail_guide) - Guide for centering the Voron 2.4 dual X rails during installation.
 * [FYSETC SPIDER DIN Bracket](./spider_bracket) - Minimalist DIN bracket for the [FYSETC SPIDER](https://wiki.fysetc.com/Spider/), based on the simple design of the core SKR bracket.  It uses a [standard build `pcb_din_clip_x3.stl`](https://github.com/VoronDesign/Voron-2/blob/Voron2.4/STLs/VORON2.4/Electronics_Compartment/DIN_Brackets/pcb_din_clip_x3.stl), and provides integrated horizontal and vertical mount options so you can choose on the fly.
+* [LGX](./lgx) - Useful information and models for using the Bondtech LGX extruder with AfterBurner
 
 ---
 

printer_mods/geoffreyyoung/dual_rail_guide/README.md

@@ -4,6 +4,8 @@ A guide for centering the Voron 2.4 dual X rails during installation.
 
 The guide is identical to the [core Voron 2.4 rail installtion guide](https://github.com/VoronDesign/Voron-2/blob/Voron2.4/STLs/VORON2.4/Tools/rail_installation_guide_center_x2.stl), with the top extruded another 10mm longer so it can touch the face of the extrusion even after the first rail is installed.  If that doesn't make sense, see the picture... or just print it and you'll see :)
 
+Since creating this model, I discovered that the Pro Tip™ way to align that second rail is by mounting it loose then using the toolhead - as the manual says, ask on discord if you have questions :)
+
 ## Printing
 
 Use the standard Voron 2.4 recommended print settings.  As with the core part, you will want to print two.  If you choose to use this you can skip printing the core guide - you don't need both.

printer_mods/geoffreyyoung/lgx/README.md

@@ -0,0 +1,72 @@
+# Afterburner + LGX
+
+Useful links, info, and models for using the The LGX™ Large Gears eXtruder with Afterburner...
+
+- [Afterburner LGX Mounts](#afterburner-lgx-mounts)
+- [Klipper config](#klipper-config)
+- [Extra LGX Models](#extra-lgx-models)
+  * [LGX Cable Cover](#lgx-cable-cover)
+  * [LGX Gear Cover](#lgx-gear-cover)
+  * [LGX Lever Cover](#lgx-lever-cover)
+
+---
+
+### Afterburner LGX Mounts
+
+Mounting the LXG to AfterBurner requires some additional mounting plates.  You will need both of `@Nemgrea`'s mounts from Discord:
+
+  * `lgx_AftB_Mount_Front.STL` ([Discord file link](https://cdn.discordapp.com/attachments/635687829254701107/823914498700083220/lgx_AftB_Mount_Front.STL))
+  * `lgx_AftB_Mount_Rear.STL` ([Discord file link](https://cdn.discordapp.com/attachments/635687829254701107/823914501405540442/lgx_AftB_Mount_Rear.STL))
+
+These models are pinned in the [#voronuser_mods](https://discord.com/channels/460117602945990666/635687829254701107/823914498808217621) channel on Discord, and can be found in [this message](https://discord.com/channels/460117602945990666/635687829254701107/823914498808217621).
+
+Thanks to `@Nemgrea V2.199 V0.000` and the crew for their efforts designing and testing the mounts, and offering them to the community.
+
+<sub>*Aside: For my own build, I found that my third-party M3x20 screws had a large enough head that the toolhead couldn't mount to the X Carriage assembly properly without a bit more clearance.  If you find yourself in this situation, [this mod of @Nemgrea's mount](STLs/lgx_AftB_Mount_Front-extra_clearance.stl) is nearly identical to the one on Discord but with slightly more clearance for the bottom screws.  Please try the (semi)official one first before using this mod :)*</sub>
+
+### Klipper config
+
+Bondtech has some official documentation for configuring Klipper [here](https://www.bondtech.se/product-category/upgrade-kits/lgx/).  Below is the configuration I am currently running.
+
+```
+rotation_distance: 8
+microsteps: 16
+full_steps_per_rotation: 200
+
+# use either
+#    gear_ratio: 44:14, 37:17
+#    rotation_distance: 55
+# or
+#    rotation_distance: 8
+# but not both!
+```
+
+The `either...or` warning is not from Bondtech, but provided here to honor the memory and sacrifice of my first hotend and save those that may come after from suffering the same fate...
+
+### Extra LGX Models
+
+#### LGX Cable Cover
+
+Besides the mounting parts, most people end up asking about a cable cover.  There are a few posted around Discord, but after seeing [Craxoor's PCB cover](https://github.com/craxoor/VoronMods/tree/master/PCB%20Cover) I designed a similar cover from scratch for use with the LGX.  Note that this cover *does not* work with the toolhead PCB - it just looks similar.
+
+  * [`lgx-cable-cover.stl`](STLs/lgx-cable-cover.stl)
+
+![cable_cover.jpg](images/cable_cover.jpg)
+
+(Cereal not included)
+
+#### LGX Gear Cover
+
+A little cover for the Large Gears on the LGX so it doesn't chew through the fan wires.
+
+  * [`lgx-gear-cover.stl`](STLs/lgx-gear-cover.stl)
+
+![gear_cover.jpg](images/gear_cover.jpg)
+
+#### LGX Lever Cover
+
+Drop-in replacement for the filament pre-tension lever, in case you want a different color:
+
+  * [`lgx-lever-cover.stl`](STLs/lgx-lever-cover.stl)
+
+![lever_cover.jpg](images/lever_cover.jpg)