Mostly Printed CNC

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Mostly Printed CNC

Release status: Working

MPCNC.jpg
Description
Multi Use CNC Platform
License
CC-BY-NC-SA
Author
Contributors
Based-on
Categories
CAD Models
External Link


The Mostly Printed CNC is an inexpensive (a few hundred dollars) CNC platform based on 608 bearings, EMT conduit, and 3D printed parts. All axis can easily be made to any length within reason depending on desired rigidity. Vicious1.com

History

Code Named Melvin CNC

The first files (23.5mm OD or 3/4" EMT) were released on Thingiverse.com March 14th 2015. April 24th 2015 an international version(25mm OD) was made to make this an easily sourced machine world wide. A large increase in rigidity was added with the "Better Middle Z" part for both machines, the only part that required support when printing.

On 5/25/16 a major revision was made to the middle and Z-Axis assemblies. The main advantages are increased rigidity, a more square gantry, and a universal tool mount for all sizes. No more support required for any of the printed parts. The MPCNC 525.

Introduction

The intent of this design is to keep the cost low and be easily built making it easy to get started in CNC. No need for a bunch of stand alone single function expensive machines when the Mostly Printed CNC does many things well.

This design started with the goal of being easily sourced inexpensive CNC platform capable of 3D Printing, laser etching, drag knife cutting, and most importantly milling with enough rigidity for light aluminum work.

All axis can be made to any length and all axis are open ended so no precision cutting is required. This is easily built with basic tools and some patience.

Parts

MPCNC 525
The precision parts are 3D printed to keep the important dimensions relatively accurate. Any control board will work, the ramps 1.4 is the most frequently used. 5 NEMA steppers drive the machine 2 on the X and Y axis one on the Z axis. A small power supply, commonly 12V 5A. The rails are common hardware store EMT Conduit, the bearings are the easily sourced 608 type, and off the shelf common hardware.

The tool head is easily changed out with a few screws when switching functions. A parasolid of a generic tool holder is available to make your own tool holder if one does not already exist for your preferred tool.

More

Video playlist, here.

Winner of Boca Bearings innovation contest in July 2015.

3ders.org article Here.

4 head 3D Printer 3ders.org write up on the 4 head here.