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Needle alignment setup

Discussion in 'Concepts and Ideas' started by Matheu Broom, Feb 22, 2016.

  1. Matheu Broom

    Builder

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    Feb 21, 2016
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    Hi

    I am looking for help and ideas on how to build a very simple alignment setup. I have a small needle which I use to produce small droplets of water that fall onto a surface directly below it. There are a few main features I need solving:

    1: Course adjustment of the needle height (around 2cm per step) over 1.5m
    2: Fine adjustment of the needle position in the horizontal plane (1mm per step) over 5cm

    I have added a very rough sketch but any ideas are welcome thank you for the help.
    The course Z movement doesnt need to be motorized if that is easier.
    upload_2016-2-23_10-6-52.png
     
  2. Rob Taylor

    Rob Taylor Veteran
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    I think a simple belt-drive for the z axis- two opposing corners attached to timing belt, which come down one outside face to a crankshaft- this allows just one motor for the whole thing whilst preventing racking. The x and y axes can be simple leadscrew affairs (a 250mm screw cut in half?). The motors can ride inside the uprights.
     

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