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Which size and material V-Wheels should I get for the Z-axis?

Discussion in '3D printers' started by l4g0, Mar 22, 2021.

  1. l4g0

    l4g0 New

    Mar 22, 2021
    Likes Received:
    Hello friends! Hope you are having a beautiful day ;-)

    I am going to do my best to keep my question simple and to the point:

    - Currently working on building a mendel style printer
    - Using 2040 profile anodized aluminum rails for the Z-axis
    - And recently found out about mini v-wheels AND the extreme solid line of products.

    Here are my questions:

    1. For my z-axis carriages, can I use the smaller diameter mini v-wheels or are they unsuitable for this kind of application?
    2. Price difference is minimal. Do extreme solid v-wheels (mini or not) have any benefits over black delrin ones for this kind of application?

    If you don't mind bonus question:

    I have been told that "3 points make a plane, therefore 3 wheels are enough for a carriage". I am not an expert in designing motion systems. Should I use 3 or 4 wheels to guide the carriages, what's your recommendation?​

    Thank you all for your kind help
  2. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

    Mar 1, 2017
    Likes Received:
    Mini V-Wheels are just fine for a 3D printer.
    Xtreme wheels are stiffer, the Delrin wheels are quieter. The Xtreme wheels are nice though.

    4 would be better, be sure to include eccentric spacers on one side, to adjust the wheels for fit.

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