# SnakeOilXY-3S

Entry level, low cost mod for Kingroon KP3S 3D printer.

For the latest documents, please visit our github page https://github.com/SnakeOilXY/SnakeOilXY-3S

## 1. Introduction

Kingroon KP3/3S is a nice small printer, but it comes with some mechanical design problems. This mod is aiming at fixing there problem with the lowest cost as possible.

## 2. The problems and solutions

### 2.1. X and Y axis

- There is no proper way to adjust the belt tension of X and Y axis

- The belt path is not straight. This will affect the printed part dimension based on where it printed on the build place, special on large model.

- This mod added belt tensioner for X and Y axis.

- Change the belt mounting method to make the belt path straight.(check image bellow, this method apply for both X and Y belt).

- All motor shafts are supported by bearing.

### 2.2. Z axis

- On some revisions of KP3/S the Z motor center and leadscrew nut are not well aligned. This will make the leadscew wobble and result in Z banding problem.

- This mod added Oldham coupler and Position adjustable top support bearing.

- Position adjustable top support bearing will allow to fine-adjust the leadscrew position so it parallel to the Z v-slot extrusion.

- Oldham coulper will deal with axial and angular misalignments of the leadscew nut.

### 2.3. E axis (optional)

- There is no problem with the original extruder except it too heavy for the unsupported gantry.

- This mod added 2 options for lighter extruder: Direct drive Sherpa mini mount and bowden extruder mount.

- The above extruder mounters can be use with V6 hotend or any other hotend using the same mounting method(Dragon hotend with groove adapter for example).

- Optional mounting slot for BLtouch/3Dtouch

- Compatible with bear_extruder_and_x_axis fan duct and other 3rd party ducts like RH_Dreambox's Air nozzle for the Bear extruder (Rev.1) or MajorOCD's Fan Duct for Bear Extruder

### 2.4. Klipper config

- Please visit our github for the latest update

## 3. Bill of materials

- Please visit our github for the latest update

## 4. How to print parts

- PETG, ABS or PC filament depend on your budget and how hot you will run the printer.

- 0,4mm nozzle, 0.2mm layer height, 5 walls, 30% infill. Support on build plate only.

- Oldham coupler will need to be printed with small layer height(0.05~0.1mm) and small diameter nozzle(~0.25mm) if possible. This parts will need some sanding to make the mating surface smooth enough.

## 5. Copyright Notice

- Sherpa mini extruder is an original work of Annex Engineering, modified parts using their source code/design files are re-released under ANNEX Engineering License.

- bear_extruder_and_x_axis is an original work of Grégoire Saunier, modified parts using their source code/design files are re-released under GNU General Public License v3.0.

- The CAD assembly using Kingroon KP3/S model of Fukuma Yohei at Thingiverse - Kingroon KP3S full assembly STP/OBJ data under Creative Commons - Attribution license

- This printer design(SnakeOilXY-3S), it's document and software are released under GNU General Public License v3.0.