Mark your balls (tennis, that is)!
Mark your balls (tennis, that is)!
Mark your balls (tennis, that is)!
Mark your balls (tennis, that is)!
You ever go to the tennis court, and have a hard time telling your balls from somebody else's? Well, here's my stupid project of the day: The tennis ball stencil.

The procedure is:
  • using your CNC router, create a spherical stencil that fits on to a ball.
  • spray paint each ball
  • Voila!

    Tools needed:
  • CNC router, or better yet a 3-d printer.
  • a hunk of 3/4" wood
  • spray paint
  • some balls

  • In the next step, you'll see how I created the 3-d model.

    Step 1: Create your 3D model

    Mark your balls (tennis, that is)!
    I used 3/4" wood to create the stencil. Simply make a 3/4" sheet, and scoop sphere out of it. Tennis balls are 6.7cm in diameter. Leave a mm or two of thickness at the bottom so you don't cut through.

    Grab the attached inventor file if you don't want to make your own.

    I added all design and g-code files to the attached .zip file. Just download and carve :-)

    Mark your balls (tennis, that is)!
    tennis-ball.zip491 KB

    Step 2: Create the G-Code

    Create the g-code from the 3-d model. I divided carving the sphere into a separate step from carving the smiley face. That way I can make a few spherical templates, then carve different patterns.

    Step 3: Carve!

    Mark your balls (tennis, that is)!
    I carved the sphere, then the smiley.

    Step 4: Cut out the smiley face!

    Mark your balls (tennis, that is)!
    Using the attached smiley.ngc, you can carve the smiley face :-)

    Step 5: Paint

    Mark your balls (tennis, that is)!
    Now, it's a simple matter of holding the tenns ball onto the stencil while spray painting :-)

    Wash rince repeat!

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