dherrendoerfer / the-bad-robin-3d-printer

Home of the Open Source 'Bad Robin' 3D Printer

The Bad Robin 3D Printer

The Bad Robin 3D Printer is an Open-Source 3D Printer project. Its goal is to provide an affortable, versatile and robust 3D Printer design.
It was designed for the use in schools and universities, where the availablility of spare parts are key to the success of a 3D Printer, and so it was designed to be able to produce its own spare parts. Also a school printer should be easy to store, so this frame design was chosen to use as little shelf space as possible .

Main design features

• It is built-up of only well-established parts that are widely available.
• It features a new single-fan extruder desing for a super-light extruder with print cooling.
• It is parametric: Height, width or length may change, the 3D-Printed parts that make it up always remain the same.
• It is rugged: The base and frame are very strong if the printer ever becomes un-aligned it is very easy to fix.
• It provides superior quality prints: The desing is made to minimise vibrations and wobble making for great prints.
• It can replicate: Even the smallest (250mm) variant can print all the parts for its larger siblings.
• It is affordable: Depending on sourcing, the price does not exceed $250 for the 250mm version.
• It is expandable: Multicolor or Heated printbed ? Everything is possible.

Licensed under GPL:

The Bad Robin 3D printer project files

For more information see the Bill-of-materials and the documentation in the Docs directory.

Videos:

The development of the 3D Printer and its beginnings are documented on my YouTube Channel.

The general intro video is here:
https://www.youtube.com/watch?v=5juObRKD8EM&list=PLotvT33qzzfLR7SWEICwr2An6o4muybxc

There is a build video available here:
https://www.youtube.com/watch?v=sfIAuq82kME&list=PLotvT33qzzfLR7SWEICwr2An6o4muybxc

And don't forget:
have FUN!
D.Herrendoerfer

Donations:
If you would like to make a donation to keep this project and others going you can do so at:
https://www.paypal.me/dherrendoerfer
This helps a lot !

the-bad-robin-3d-printer's Issues

Parametric design

The readme states that the design is parametric. Could you please provide more information on the design constraints?

I would like to know how the length of the rails in each axis affect the print volume. Also why is the design with 250mm rails considered minimal? Is there any contraint that would preclude using smaller rails?

I am looking to build a printer with a 215x215mm bed size and perhaps restrain the Z axis to 100mm as I rarely print tall pieces. What dimensions of extrusions and rails would I need?