Custom CNC’d Lens Caps

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I recently bought a Chinese made CNC (

Unicut 3020 CNC

Unicut 3020 Control Box

Step 1

The first thing I did was to grab my trusty digital calipers and measure the dimensions of the flat, blank lens caps I ordered off of Ebay.

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Step 2

I took the dimensions from step 1 and created an outline of the lens cap shape in Adobe Illustrator.


Step 3

I downloaded the Hack A Day logo and placed the logo in the center of the lens cap outline in Illustrator. (You can use any vector file, or make your own!)


Step 4

Here is where it gets a bit tricky. You have to select the items you want to cut and export them to a .dxf file type to be able to import the image into CAM software.

The settings I used can be seen below.


Step 5

Import the file into CAM software. In this particular example I used CamBam. I love this software and you can get a free trial!


Step 6

Center the image and select paths to be cut out. (Pocketed)


Step 7

Input CNC settings/parameters.


Step 8

Generate toolpaths/G-Code.


Step 9

Open G-Code in CNC control software (NcStudio in my case) and run the program.


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Step 10

Remove lens cap for jig, clean, and paint with model paint using a syringe!

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The Finished Product!


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