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rctgantries

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  • Jake Read's avatar
    Jake Read authored
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    cad
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    kunits
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    Roller Coaster Gantries

    Parametric, low-complexity fabrication linear axis designs using ubiquitous hardware.

    Gantry for NEMA23 Motor, 1/4" Aluminum

    RCTN23-025ALU

    RCTN23-025ALU Fusion CAD File

    In Fusion[^2], you can open this file up and use (from the top menu)

    Modify >> Change Paremeters

    Each of these models should have some parameters starred, these are what you'll want to configure. Go ahead and set axis lengths, material thicknesses according to what you're doing. When you're satisfied, you can export the model as a .step file, using the file menu, to prep it for fabrication.

    File >> Export

    Make sure to change 'type' to .step, and check the 'save to my computer' box.

    N23 / 0.25" ALU Hardware

    Type Size QTY Where Used McMaster PN
    SHCS M3 2.5mm Hex 91292A110
    SHCS M4 3mm Hex 91292A116
    SHCS M5 4mm Hex 91292A124

    N23 / 0.25" ALU Tools

    Tool Where Used McMaster PN or Link
    M3 Tap Extensively

    90 Degree Block for 1/4" Aluminum

    RCTBLK-90-025ALU

    RCTBLK-90-025ALU Fusion CAD File

    REF

    Find Open Assemblies Hardware Reference for shorthands etc.

    Jake's Notes

    • doc

    • bom

    • hardware callout drawing (probably more useful than video)

    • nice to include a note on what those flexures are up to ... and some other design decisions

    • kinematic mounts are three button head cap screws on 20mm grid w/ reciprocal / wherever-u-like mount ins

    • all axis have scroll-along top plate w/ connection to motor plate, final scroll kinematic triangle

    • all axis have scroll-along bottom beam plate w/ 20mm grid w/ last scroll kinematic triangles