Mini kossel 3d printer kit

Kossel Mini Review 2022 - Why This 3D Printer May Be For You

The Kossel Mini is a decent 3D printer and the smaller version of the original Kossel. But can it print? Yes! Read our full review of this 3D printer.

By Justin Evans

May 26, 2022

3.8

See Price

There’s been a lot of talk about open-source 3D printers recently, but how do they hold up against specialized, usually more expensive models? To find out, we’ve researched the Kossel Mini – a minimalistic little printer with more than a few die-hard fans.

We won’t be going easy on it just because it’s cheap to build, though. We’ll be addressing any issues we encounter so you can decide for yourself it the Kossel Mini is right for your needs. Of course, the flip side of this is that we’ll also be giving credit where credit is due.

Filament Diameter	1. 75mm
Extruders	1
Supported Materials	PLA, ABS, Exotics
Connectivity	USB, SD Card
Printing Speed	320mm/s
Build Volume	6.6 x 6.6 x 9.4”

Table of ContentsShow

Design

One of the great things about this printer is that many of the parts you need can actually be 3D printed themselves. You will still have to purchase the mechanical and metal components, though, but all in all, it has a nice, simple design. There are lots of construction guides too, so that won’t be an issue.

We’re big fans of the open design. This allows you to build larger objects without having to resort to combining several smaller discrete parts. You should note that as it’s a vertical build area, you’ll probably have to build more supports than with a traditionally-shaped build zone.

There is only a single extruder, but it moves very quickly: up to 320mm/s. For comparison, that’s about 33% faster than some premium printers we’ve covered in the past. Because of the open-source nature of the project, you can also upgrade it extremely easily.

Printing

The print quality is about what you’d expect from a low-end 3D printer. For the most part, models come out looking decent, but certainly not what you’d call professional-level. For instance, the layers are clearly visible and there’s often a little excess material left hanging. However, this printer is highly customizable and you may be able to reduce these issues with a little tinkering.

There’s support for a good range of materials, including exotics, which is great to see. Remember – most Kossel Mini kits won’t include a metal extruder, so if you want to print with exotic materials, you’ll have to pick one up separately.

We’d say that this printer is best suited to people looking to get into 3D printing as a hobby. It’s not quick enough for commercial applications, and it’s a little fiddly to get started with, but once everything’s set up, it’d make a great long-term project.

Features

Because you have to build this printer yourself, there’s scope for all kinds of upgrades and add-ons. For instance, you can add a second extruder for far less than most companies charge. We’ve even seen heated print beds, like in the image above. The only limit is your imagination.

That said, the basic Kossel Mini is fairly limited in terms of functionality. It has a small microcontroller that you can use to set up a print, but you can also connect it straight to your computer. There’s USB stick and SD card support, but no WiFi, which is to be expected.

There is an automatic bed-leveling function, though, which takes a lot of the hassle out of starting a print. It might not be much in the grand scheme of things, but every second you save is a second you could be dreaming up cool things to create.

Support

Since you buy this printer in pieces, the warranty provided will differ from one retailer to another. That said, you’ll struggle to find another 3D printer with as much freely available support information. Seriously – the Kossel site redirects to an extremely in-depth user guide with extensive documentation. That’s always a bonus!

We’ve also found that modification guides for the printer are easily found online, and there are even some quick additions you can print out yourself. Think about it: the Kossel Mini is a printer that (with your help) can actually improve itself over time.

Cost

While several sources suggest that the components for the Kossel Mini should cost less than $600, we’ve actually found kits available for around $190. When you consider that even the most basic 3D printer costs around $300, the advantages of open-source hardware quickly become clear.

Of course, what you save in cold, hard cash, you pay for in elbow grease. The Mini is a pretty complex thing to assemble if you’ve never done it before. That said, it shouldn’t take you more than a day or two, provided you bought everything you needed beforehand.

The other problem is there’s no official repair service. You’re saving money on the initial purchase because if anything goes wrong, it’s going to be down to you to fix it. If you’re the type of person that likes to experiment, you’ll likely love this. If not, well, maybe choose a prebuilt printer instead.

Review Summary

The Kossel Mini shows how good open-source tech can be. However, it might be a little too hard to build and maintain for novice users.

MakerBot Replicator 5th Generation Review

Kossel - RepRap

Kossel

Release status: experimental

Description	Delta robot 3D printer with extrusion frame.
License	GPL
Author	User:Johann
Contributors
Based-on	Rostock
Categories	Kossel
CAD Models	GitHub
External Link	Blog

Kossel is a parametric delta robot 3D printer, built in 2012 by Johann in Seattle, USA, based on his Rostock prototype.

It is named after Albrecht Kossel, German biochemist and pioneer in the study of genetics. He was awarded the Nobel Prize for Physiology or Medicine in 1910 for his work in determining the chemical composition of nucleic acids, the genetic substance of biological cells.

1 History
2 Design Goals
3 Bill of Materials
- 3.1 Printed parts
- 3.2 Frame
- 3.3 Fasteners
- 3.4 Linear motion
- 3.5 Diagonal push rods
- 3.6 Bowden
- 3.7 Endstops
- 3.8 Electronics
- 3.9 Tools
4 Assembly instructions
- 4.1 Step By Step Instructions
- 4.2 Autolevel probe
- 4.3 FSR Autolevel
- 4.4 Viki LCD with Azteeg X3
- 4.5 Where to buy
5 Links

History

There are several printers in the Kossel family.

Legacy Kossel

Spectra line instead of timing belt.
623 bearings running directly on vertical 15 x 15 mm aluminum extrusion like OpenBeam, 6 bearings per carriage.
PG35L extruder directly on the end effector (moving platform).
This design is deprecated but the source files are still available.

OpenBeam Kossel Pro

Terence Tam's design for mass manufacturing.
Successfully funded on Kickstarter.
Stamped and injection molded parts instead of 3D printed.

Mini Kossel

This is Johann's latest and stable version.
The rest of this page describes the details of Mini Kossel.

Design Goals

Zero backlash.
Type: Delta printer
Speed: 320 mm/s in all 3 directions.
Resolution: 100 steps/mm in all 3 directions.
Repeatability: better than 0.03 mm (30 micron)
Build volume: cylindrical, 170mm diameter, 240mm height.
Footprint: triangle, 300 mm width (240mm OpenBeam + printed corners).
Frame height: 600 mm.
Print surface: unheated round glass, doesn't move.
Mass of end effector with hotend: less than 50 grams.
Simplicity: fewer than 200 parts.
Hardware cost: less than $600 USD.
Fully automatic print surface level calibration (autoleveling).

Optionally scale down to a Traveling RepRap that fits within IATA hand luggage size limit (see transportation):

Frame height: 550 mm.
Footprint: triangle, 270 mm width, 250 mm across (210mm 15 x 15 mm aluminum extrusion like OpenBeam + printed corners).

Bill of Materials

Printed parts

All files come from Johann's Kossel repo: https://github.com/jcrocholl/kossel

1x hotend_fan.stl which also serves to attach the hotend.
1x plate_1x.stl which includes the following parts:
- 1x End effector RobotDigg Effector
- 1x Extruder RobotDigg Extruder
- 1x Retractable Z probe
- 2x Power supply bracket (optional)
3x plate_3x.stl which includes the following parts:
- 3x Bottom vertex RobotDigg
- 3x Top vertex RobotDigg
- 3x Vertical carriage RobotDigg
- 6x Endstop holder
- 3x Print surface holder

Recommended print settings:

Layer height = 0. 2 to 0.3 mm (around 60% of your nozzle size)
Perimeters = 3
Top/bottom solid layers = 3
Infill density = 50%

Note, a PLA End effector may bend or warp if it is not cooled with a fan or insulated. The insulation can be as simple as a loose layer of tin foil to create air pockets between the tin foil and the part. An ABS end effector is less likely to bend. It can also help to insulate parts of the hot end with Kapton tape.

Quality machined aluminum parts are available from RobotDigg

A kit with the printed parts is available @ Builda3Ddprinter.eu and think3dprint3d in Europe, or TriDPrinting.com, CrunchTech's eBay store or from Erie 3D Printing in the USA.

Frame

3x 600mm vertical OpenBeam from Builda3dprinter.eu or OpenBeam.de or Misumi HFS3-1515
9x 240mm horizontal OpenBeam from Builda3dprinter.eu or OpenBeam.de or Misumi HFS3-1515
1x 170mm round glass/borosilicate plate TriDPrinting. com or Makea3dfactory.comor Builda3dprinter.eu or Ultibots LLC or 3dprinteu.eu/shop

Fasteners

100x M3x8mm stainless steel screws (frame and most connections)
100x M3 stainless steel nuts
100x M3 nyloc nuts
6x M3x20mm stainless steel screws (arm attachment to vertical carriage)
12x M3x25mm stainless steel screws (belt idlers and effector-rod attachments)
6x M3x35mm stainless steel screws (tensioners)
50x M3x6mm stainless steel screws (rail attachment to extrusions - 8mm is too long!)
12x M3x16mm stainless steel screws (push rod attachment)
6x M2.5x12mm screws (micro switches)
3x M2.5x16mm (automatic bed leveling probe)

A nuts, bolts and screws kit is available from TriDPrinting.com or Builda3dprinter.eu.

Linear motion

3x 400mm hardened steel rail and carriages HIWIN MGN-12H
3x 1164mm GT2 belt closed loop with 2mm pitch and 6mm width - UltiBots LLC.
6x F623ZZ flanged bearings 3x10x4mm (or F684ZZ 4x9x4mm for printed parts before June 21st)
3x GT2 pulley with 16 teeth and 2mm pitch
3x Kysan NEMA17 stepper motor,TriDPrinting.comor Builda3dprinter.eu or UltiBots LLC.

Diagonal push rods

12x Traxxas 5347 rod ends Traxxas 5347 $14.99
12x M4x20mm set screws
6x 180mm Carbon tube ID=4mm

A pre-cut rod kit is available from Builda3dprinter.eu and are 3K woven carbon rods]. Fully assembled carbon rod kit is available at 3dprinteu.eu/shop or TriDPrinting.com or www.UltiBots.com

Bowden

1x J-Head Hotend 0.5mm for 1.75mm filament
1x Clear PFA tubing ID=2mm OD=4mm
2x Push fit connector ID=4mm with M5 thread (or bigger thread before June 21st).

Motor

1x NEMA-17 motor with an integrated Planetary gearbox with a 5 2/11 :1 ratio.(http://robot-italy.com, Builda3dprinter.eu for EU (http://www.phidgets. com/products.php?product_id=3317 in US).
1x Spur Gear, 22 Tooth, 12mm od, 8mm id - #S10T05M022S0508 from SDP-SIor Builda3dprinter.eu. Alternately, a Hardened MK7 drive gear that fits the geared stepper motor is available from TriDPrinting.com
3x M3-0.5x25 Cap Screw
3x M3 Washer

Idler

1x 625 ball bearing (5x16x5)
1x M5-0.8x20 Cap Screw
1x M5 Washer
1x M5-0.8 Hex Nut (Nylock optional)
1x M3-0.5x16 Cap Screw
1x M3 Washer
1x M3-0.5 Hex Nut, Nylock

Endstops

3x Omron SS-5 micro switch or Honeywell ZM10B10A01 - UltiBots LLC.

Automatic Bed Leveling Options - Only need one of the following, depending on which you choose.

 FSR(force sensitive resistor)

3x FSR circular pads
3x mounts for fsr pads

 Bed leveling probe

1x Micro switch (same as for endstops above)
1x Bondhus 1. 5mm allen wrench
1x Safety pin with 2.5mm loop
2x Ball point pen spring
1x Euro-style terminal block connector
1x Heat shrink tubing ID=2mm

 Proximity Sensor

Excellent guide to set up proximity leveling can be found on Instructables, search for "auto bed leveling Marlin"

1x PNP Inductive proximity sensor

Several versions are available but the most popular and simple to use is the LJ12A3-4-Z/BY. This model works at 6-36vdc(many other models need at least 12v), and has a sensing distance of 4mm. Can be bought on eBay for <$5

1x mount for your specific effector/carriage

Electronics

1 Electronics setup RepRap Interface Standard #RIS 1 compatible or anything else compatible
1x 12V 5A LCD screen power supply
1x 3010 DC Fan and 1x 4515 Blower Fan RobotDigg

Tools

This is not a comprehensive list, but should give you an idea of what tools may be required. Review all build manuals/videos to ensure you have all necessary tools.

1x metric caliper
1x M4 Tap Drill bit
1x M5 Tap Drill bit
1x 1.5 mm allen wrench
1x slow-set epoxy

Assembly instructions

Step By Step Instructions

For a video tutorial and step by step instructions see the following website: Kossel mini & Kossel XL build instruction or go to the YouTube channel

Instructions for Kossel Mini kits from Blomker Industries

IPFS link to Instructions

Detailed build manual from Think3dPrint3d with pictures for every step is available here:

Think3dPrint3d Kossel mini build manual

This is a GERMAN translation of Think3dPrint3d's manual:

HKBay.com Mini Kossel Detaillierte Bauanleitung in PDF Format

HKBay.com Mini Kossel Detaillierte Bauanleitung auf Instructables.com

Wiring and commissioning instructions for Mini Kossel using 32-bit Duet electronics:

https://miscsolutions. wordpress.com/2015/01/04/upgrading-the-mini-kossel-to-duet-electronics-part-1-hardware/ and the other articles in that series

Video assembly from the perspective of someone new to the Kosssel:

YouTube Playlist by engineglue

Autolevel probe

X_MAX, Y_MAX, Z_MAX top endstops: NC (Normally Connected). M119 for these should show:

TRIGGERED when the carriage touches the endstop.
open during normal operation.

Z_MIN autolevel probe: NO (Normally Open). M119 for Z_MIN should show:

TRIGGERED when the autolevel probe is retracted (up).
open when the autolevel probe is deployed (down).
TRIGGERED when the autolevel probe touches the print surface.

Make sure that M119 does NOT show X_MIN or Y_MIN, if it does you must change them to -1 in Marlin/pins.h.

Although the parts list suggests that a small allen wrench be used, in reality, a short piece of wire might work slightly better since it can rotate more easily.

FSR Autolevel

http://reprap.org/wiki/FSR

Mini Kossel FSR Auto Leveling Setup Guide

Viki LCD with Azteeg X3

References:

Azteeg X3 wiring diagram
Viki LCD wiring diagram
RepRap forum thread with pictures

Connect Viki J2 to Azteeg EXP3 port like this:

+5V to +5V (red)
GND to GND (black)
SDA to SDA (blue)
SCL to SCL (green)
ENC_A to D22 (white)
ENC_B to D7 (yellow)

Connect Viki J3 to Azteeg ICSP port like this:

CS to CHIP SELECT (D53) (red)
BTN to D32 on EXP2 (optional) (black)
DI to MOSI (blue)
CLK to SCK (green)
DO to MISO (white)
CD to CARD DETECT (D49)(yellow)

CS (D53) and CD (D49) are directly next to the ICSP port, slightly under the expansion shield, but the connectors still work fine if you push them in slightly angled.

BTN is for the pause/stop/resume LCD button (kill switch). We recommend not connecting it and using a power switch for emergency stop instead. If you do want to use it, it should be connected to the Arduino BTN_ENC pin. Otherwise set BTN_ENC to -1 if not used.

This uses the LiquidTWI2 library v1.2.3 or later. Copy the LiquidTWI2 directory into the Arduino libraries subdirectory (something like /Applications/Arduino.app/Contents/Resources/Java/libraries/LiquidTWI2, just next to the existing LiquidCrystal folder). If you end up with a directory named "LiquidTWI2-master" then remove the "-master" part. We tested this successfully with Johann's latest Marlin version (as of 2014-03-21) and Arduino 1.0.5.

In Marlin/Configuration.h uncomment or adjust the following lines:

#define MOTHERBOARD 33 // Azteeg X3
#define LCD_I2C_VIKI

In Marlin/pins.h under MOTHERBOARD == 33 adjust the following lines:

#define SDSS 53
#define SDCARDDETECT 49
#define BTN_EN1 22
#define BTN_EN2 7
#define BTN_ENC 31

Disconnect solder jumper JP12 at bottom of Azteeg X3 to disable onboard SD slot and use pins for external SD reader (Viki LCD SD slot).

Where to buy

Shop	Stock	Location
3dprinterkart.com	- Kossel/Delta Lowest Prices	India based - ships worldwide
3dprintersbay.com	- Kossel/Delta Printers	US based - Ships Worldwide
Build A 3D Printer.eu	Kossel Mini & XL - Highest quality parts	EU/Netherlands based - ships worldwide
Think3dPrint3d	Complete DIY Kit Components	UK based - ships worldwide
www.HKBay.com	Komplettes DIY Kit mit Deutscher Anleitung	HK/Switzerland based - ships worldwide
www.UltiBots.com	Kossel Mini & 250 V-Slot DIY Kits	USA Based - ships worldwide
3DMarkt.at	Complete DIY SET, E3D Extruder, Large	Austria based - shipping to EU
reprap.cn	full metal extruder,four wheels design bigger size	China based - shipping to worldwide
reprapworld. com	Kossel mini	Netherlands Based - ships worldwide
RepRap PT	Printer Parts	Portugal Based - Ships to Portugal and Spain
FunReprap France	Kit Kossel Mini et Maxi en Français	Site Français - Mode d'emploi en Français
Replikeo	Kit or Assembled Kossel	Hong Kong based - Worldwide shipping
DIYKits.eu	Improved Kossel Mini Kit	EU/Croatia - Ships to EU

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Answers to questions about kossel

For questions about the Kossel family of printers in particular. Questions about Delta printers in general have their own tag. nine0003

This tag is for questions specifically about the Kossel family of printers. Questions about delta 3D printers usually have their own tag.

Kossel 3D printer is a parametric delta printer based on Rostock 3D printer. From RepRapWiki - Kossel:

Kossel is a delta robot parametric 3D printer built in 2012 by Johann in Seattle, USA, based on his Rostock prototype.

It is named after Albrecht Kossel, a German biochemist and pioneer in the study of genetics. He was awarded the Nobel Prize for Physiology or Medicine at 1910 for his work by definition chemical composition of nucleic acids, genetic substance biological cells.

The original printer has spawned a number of derivatives that differ mainly in their size, but which basically have the same design. Again, from RepRapWiki - Kossel:

History

There are several printers in the Kossel family.

Kossel heritage

Spectrum line instead of timing belt. nine0017
623 bearings running directly on a 15 x 15mm vertical aluminum extrusion such as OpenBeam, 6 bearings per bottom bracket.

Extruder PG35L directly on the end effector (moving platform).

This design has been deprecated, but the source files are still available.

OpenBeam Kossel Pro

Designed by Terence Tam for mass production.

Successfully funded on Kickstarter.

Stamped and injection molded parts instead of 3D printing. nine0017

Mini Kossel

This is the latest and stable version of Johann.

The rest of this page describes the details of the Mini Kossel.

There are other (usually larger) projects from other authors, namely Terence's and David Crocker's , among others.

The original goals of this particular delta-style printer design, as opposed to the more traditional cartesian-style designs that exist, are as follows:

Design Objectives

Zero backlash.

Type: Delta Printer

Speed: 320 mm/s in all 3 directions.

Resolution: 100 steps/mm in all 3 directions.

Repeatability: greater than 0.03 mm (30 microns)

Assembly volume: cylindrical, diameter 170 mm, height 240 mm.

Size: triangle, width 300 mm (240 mm open beam + printed corners).

Frame height: 600 mm.
nine0012 Print surface: unheated round glass, does not move.
Mass of end effector with hotend: less than 50 grams.

Simplicity: less than 200 parts.

Hardware cost: less than $600.

Fully automatic print surface level calibration (auto leveling).

(Source: RepRapWiki - Kossel)

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Complete list of fasteners for Sintron Kossel TL;DR I need a complete list of fasteners (bolts, nuts and washers) for Sintron Kossel. Has anyone bought this kit and knows the answer, or knows where it's documented? Full list…

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Table leveling method not working with Repetier firmware 0.92.9? I built a delta 3d printer (e.g. Kossel mini) with Z-probe next to hotend with manual deployment and RAMPS 1.4 board: I set up the Repetier firmware with an online tool; All my…

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Mini kossel 3d printer kit

Kossel Mini Review 2022 - Why This 3D Printer May Be For You

Design

Printing

Features

Support

Cost

Review Summary

Kossel - RepRap

Contents

History

Design Goals

Bill of Materials

Printed parts

Frame

Fasteners

Linear motion

Diagonal push rods

Bowden

Endstops

Electronics

Tools

Assembly instructions

Step By Step Instructions

Autolevel probe

FSR Autolevel

Viki LCD with Azteeg X3

Where to buy

Links

Site map

Answers to questions about kossel

History

Design Objectives

Learn more