Prototype Geneva Drive

Sat, 18 Jan 2014

The Geneva drive is a mechanism for creating intermittent rotary motion. In this version the red wheel is driven, for each turn of the red wheel, the yellow Geneva wheel turns one fifth of a turn.

This is the first draft of a laser cut Geneva drive mechanism.

The two parts of the driven wheel are held together with tight fitting pins.

As you’d expect with a first draft there are a couple of changes that need making. As the drive wheel turns, the pin that turns the yellow wheel goes very close to the end of the slot. A couple of extra millimeters depth would be good. Also, I think I’ll chamfer off the corners of the ends so that they don’t catch on the crescent shaped part. Looking good though, and it does work!

Instagram Link Embed by

  To receive new blog posts by email

Comments (3)

  • umehta January 18, 2014 at 10:28 pm

    Just curious – what type of
    Just curious – what type of tolerance accuracy you get out of your 3D printer?

    • cool022883 January 19, 2014 at 12:30 am

      i think rob has a laser
      i think rob has a laser cutter not a 3d printer.this post explains how the laser cutter works

      • robives January 19, 2014 at 12:02 pm

        Thanks for that Mr Cool. It
        Thanks for that Mr Cool. It is indeed a laser cutter. The quoted accuracy is 0.1mm

Comments are closed.