Computer numerical control, or CNC, has been around since the 70s, but recent developments in small-scale CNC have made it possible for many more people to gain access to a machine. In the CNC Challenge, we’re looking for all things CNC: whether you’re using one as a tool to help build your project, or you’ve constructed your own CNC machine. The winner of this challenge will take home a brand new, assembled Printrbot Simple Metal 3D printer, along with a gorgeous custom award, made by the CNC King himself!

Speaking of the CNC King, Jon Cantin — he will be helping judge this contest. Known as the one-man IKEA, Jon has designed over 300 CNC laser, 3D printer and router projects which he sells on CNCKing.com. He is completely self-taught and has published 4 books on the topic with his 5th due out in a few months. His shop CNCROi.com offers a host of custom CNC services which are produced using his Trotec Speedy 400 flexx (110/30) and a ShopBot Desktop among a few other toys.

We can't wait to CNC what you make!

Want more contests? Check out Instructables' upcoming contests here!

The CNC Challenge is closed.

Grand Prize

26 Prizes

Grand Prize (1)

One Grand Prize winner will receive:

Runner Up (25)

Twenty five runner up prize winners will receive an Instructables prize pack including a robot t-shirt.
How It Works

Write an Instructable

Create a new Instructable that fits the guidelines outlined in the contest description above. To be eligible, Instructables must be published between Feb 16, 2015 and Mar 16, 2015 (11:59pm PT).


Upon publishing your Instructable you'll see checkboxes for open contests. Select CNC Challenge. If you have entries currently eligible for entry, it will also show up by clicking "Enter this Contest" on the right side of this page.


Entries are accepted by Instructables staff within one business day Monday - Friday. What matters is the submission time, not acceptance time.


A panel of judges made up of Instructables staff and respected members of the community rate the finalists. The averages of the ratings determine the winners.


When the winners are decided they will be notified and announced here on the contest page.