Giova's Extruder

by GiovaGio, published

Giova's Extruder by GiovaGio Mar 22, 2016
0 Share
Download All Files

Thing Apps Enabled

Order This Printed View All Apps


Design Tools


A part of these Groups

View All


Liked By

View All

Give a Shout Out

If you print this Thing and display it in public proudly give attribution by printing and displaying this tag.

Print Thing Tag

Thing Statistics

1021Views 159Downloads Found in 3D Printer Extruders


The goal of this project, started in Spring 2015, was to create a cheap and lightweight extruder, the first choose was "24BYJ48", substituted with "28BYJ-48" (Fig.1) because stronger, cheaper and easy to find.
This stepper motor is unipolar and it needs to be modified to become bipolar, there are 2 methods: the first method consists by unmounting the case (Fig.2). the second consists, in a faster and less invasive method, by cutting the plastic case and PCB, i suggest this method (Fig.3).

You need:
x2 - 28BYJ-48
x2 - 40mm fans
x4 - M3 screws + nuts
x4 - M4 30mm screws + nuts
x5 - M4 20mm screws + nuts
x2 - MK8 drive gear for 1,75 mm filament
x2 - 605 2RS 5X14X5 bearings
x? - M4 washers
The connection to RAMP 1.4 must be modified (Fig.4), the connector of second extruder is inverted connected

Assembly: (Fig.5)
(Tolerance is always 0,5mm excluding Hot-Ends connectors)
Idlers are different and they are marked with L or R letters visible in the model, the washer is used to centering the bearing with drive gear (fig.6).
Hot-Ends connectors dimensions are copied from Greg Wade's extruder, their distance is 23mm.

How to use it:
This motor is slower, fragile and weak compared to NEMA17, plastic gears inside it can be easily damaged, so the Hot-End temperature must be increased to soften more the filament (in my tests i use PLA at 210-220°c), maybe the print speed will need to be slower, another problem with this motor is the pression of idler, if less the filament is not pulled into Hot-End, if too much the motor don't go, you have to find the right distance, i suggest to add washers at idler regulating screw to fix at the right distance you found, so u don't need to find the right distance everytime(Fig.7).
Top fan is needed because the motors overheat fast, motors drivers power should decreased because these motors need less power then NEMA17.

Steps per mm are ~1500
Max speed is ~8mm/s

The motor don't works: wrong wiring, filament idler pressure is too much, speed is too fast, driver power is too low, it's broken.
No filament extrusion: filament idler pressure is too much or less, Hot-End temperature too low.
Filament extrusion is unstable or stops after a while: filament idler pressure is too much.
Layers are not uniform/bad looking object: try to increase temperature(Fig.8).

Other objects in the photos:

Print Settings





Custom Section

More from 3D Printer Extruders

view more

All Apps

3D Print your file with 3D Hubs, the world’s largest online marketplace for 3D printing services.

App Info Launch App

Auto-magically prepare your 3D models for 3D printing. A cloud based 3D models Preparing and Healing solution for 3D Printing, MakePrintable provides features for model repairing, wall thickness...

App Info Launch App

Kiri:Moto is an integrated cloud-based slicer and tool-path generator for 3D Printing, CAM / CNC and Laser cutting. *** 3D printing mode provides model slicing and GCode output using built-in...

App Info Launch App
KiriMoto Thing App

With 3D Slash, you can edit 3d models like a stonecutter. A unique interface: as fun as a building game! The perfect tool for non-designers and children to create in 3D.

App Info Launch App

Print through a distributed network of 3D printing enthusiasts from across the US, at a fraction of the cost of the competitors. We want to change the world for the better through technology, an...

App Info Launch App

Quickly Scale, Mirror or Cut your 3D Models

App Info Launch App

3D Print a wide range of designs with Treatstock. Easy to use tools to get the perfect result. The global 3D printing network that connects you with high-quality and fast working print services nea...

App Info Launch App