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Group 2

Jarni, Benedik, Richard

DIY CNC mill

Workflow

Links: Nextcloud:

3D modeling:

    everyone works on thier sub assemblys work in private directorys upload versions to the shared folder

    Design decisions

    General

    standart PCB sizes:

    • metric: 150mm*100mm
    • imperial: 127,38mm*102mm (5inch * 4inch)

    material goals:

    1. PCB milling very precise 0,4mm traces
    2. engrave stone soft limestone

    work table (fixed)

    • 160mm*120mm
    • 15mm? height

    outer diamensions: (might change based on final design)

    • 350mm width
    • 300mm depth
    • ? height

    Machine bed (work table):

    • uper bed: (waste board)
      • HDF/MDF
    • lower bed: steel or aluminium
      • connect upper bed and lower bed with screws

    assembly groups

    mechanical

    electrical

    software

    Y-Axis:

    X-Axis:

      leadscrew: trapezoidal thread T8
        two T8 nuts counterd for minimal backlash new stepper + axle coupling prefered: prusa stepper axle assembly bushing for trapezoidal axle

        guiding rods

        Frame:

        • vertical: 60*30 extrusion
        • horizontal: 30*30 extrusion
        • additional support by steel wires for structural regidity

        idea list:

        component list: mechanical structural: - alu extrusion 20*20 moving: - 2x 8mm leadscrews with brass nuts - 4x 8mm guide rails - electrical: mechatronic: manufacturing methods:

        • milling parts

        Links:

        • https://marlinfw.org/

        • design decicions:

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