A Pixel Machined (Halftone) Spray-Paint Stencil

tiger-paw-spray-paint-pixelsAs explained in this post, I’ve been experimenting with a process for converting a pixel-based image into G-code for machining.  The resulting picture is known generally as a halftone print.  Using this process, I was able to produce the stencil for the “painting” seen in the picture to the right.

Read on for a time-lapse video of this stencil being made as well as a few more photos of the process.  Although generally the same as how I “pixel machined” wood, I’m now using a a piece of .005 Duralar left over from this stencil to create a halftone-based stencil.  The video is pretty cool, as I placed a webcam on top of one of the router uprights and used this free program to generate everything.

One thing I would recommend when making a stencil like this is to tape down the edges.  They can get caught on the router, especially near the middle.  This happens at just after 0:20 in the time-lapse video, where I have to free the plastic and support it with my fingers.  This is less than ideal from both a safety and time perspective.  For more info, be sure to check out how I generated this stencil G-code pattern.


  1. New Bits from Zen Toolworks - pingback on November 11, 2012 at 11:07 pm
  2. Unboxing and Setup of the RAD Cycle Products Bike Stand - pingback on December 4, 2012 at 7:13 pm
  3. More "Pixel Machining" AKA Halftoning Experiments - pingback on April 10, 2013 at 9:55 am

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