• v3 was indeed final...

    tjltjl12/01/2020 at 19:59 0 comments

    The version alluded to below and pictured in the project picture was indeed final and has been in use since.

    Here it is in real life in 2019-08

    A detail of the locking mechanism, pressing down on the flat parts releases the upper plate.

    Detail of the hinge.

  • v3: Final?

    tjltjl08/09/2019 at 05:08 0 comments

    • Switched from 10-teat rectangular to 5-teat hex format
    • Redesigned hinges with a rectangular moving part to restrict motion
      • Designed the movement in python, by plotting the union of the rectamgles on the path
      • Goal: upper part can only enter from an angle it cannot be in when the lower part is installed (locked in)
      • Goal: goes a little over 90 degrees
      • After some attempts, had the following path as a union of a straight movement and a rotation around a point below the rectangle in the horizontal position

    • Redesigned lock to stay put on the lower side

  • v2: Laser-cut hinges and lock, better design

    tjltjl08/09/2019 at 04:11 0 comments

    Given the feedback, redesigned the hinges and lock, and also made the outer frame shape nicer, without trying for as much symmetry.


    • Works much better
    • This version was in use for about a month
    • The asymmetric lock placement is not nice
    • The lock and hinges are not yet good enough
      • Hinge was just a hole

  • v1: Laser cut POM + stainless steel filler rod hinge

    tjltjl08/09/2019 at 03:35 0 comments

    First truly functional version.

    Laser cut from food-safe 3mm POM plastic, filler rod wrapped around the extensions for hinge and locks.


    • It does work
    • The 3mm x 3mm POM is definitely robust enough
    • The hinge / lock system is not very good yet
    • Squishes the teats, water doesn't get to wash between the holder and the teat
    • It is a bit large

  • v0: Stainless steel TIG filler

    tjltjl08/09/2019 at 03:33 0 comments


    Trying to make out of 2.4mm stainless TIG welding filler rod. With bending was able to hold some teats but the results were not spectacular and the construction was not up to scratch. Also tried welding but the wire was a bit too difficult a target for my current welding skills