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CNC mill JarBeRi

CNC Mill by Jarni, Benedik, Richard

DIY CNC mill

Workflow

Links: Nextcloud:Workflow:

Links: 

https://cloud.tu-ilmenau.de/apps/files/files/104312242?dir=/Benutzer/CNC%20JarBeRi

3D modeling:

  • everyoneEveryone worksis working on thiertheir sub assemblyssubassemblies.
  • workWork in private directorysdirectories
  • uploadUpload versions to the shared folder

Design decisionsdecisions:

General

standartStandart PCB sizes:Sizes:

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

materialMaterial goals:Goals:

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

workWork tableTable (fixed)

  • 160mm*120mm
  • 15mm? height

outerOuter diamensions:Dimensions: (might change based on final design)

  • 350mm width
  • 300mm depth
  • ? height

Assembly Groups:

Mechanical:

Y-Axis: (Jarni)
  • leadscrew: trapezoidal thread T8
    • two T8 nuts countered for minimal backlash
    • new stepper + axle coupling
    • preferred: prusa stepper axle assembly
    • bushing for trapezoidal axle
  • guiding rods
    • 8mm
    • linear bearings
  • sled
    • 3d printed part, maybe milled aluminium
    • support structure for lower bed
  • interface plate
    • holes for T-Slot nuts
    • friction fit for guiding rods
X-Axis: (Benedikt)
  • leadscrew: trapezoidal thread T8
    • two T8 nuts countered for minimal backlash
    • new stepper + axle coupling
    • preferred: prusa stepper axle assembly
    • bushing for trapezoidal axle
  • guiding rods
    • 8mm
    • linear bearings
  • sled
    • 3d printed part
    • connected to z-axis
  • interface plate
    • holes for T-Slot nuts
    • friction fit for guiding rods
Z-Axis:
  • manual adjustment with screws
  • flexure mechanism
Machine bedBed (work table):

  • uperupper 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:

Frame:
  • leadscrew:use trapezoidalexisting: threadITEM T8Profile 6 30mmx30mm (0.0.419.06)
  • two T8 nuts counterd for minimal backlashIMG_4269.jpeg
  • new stepper + axle coupling
  • prefered: prusa stepper axle assembly
  • bushing for trapezoidal axle
  • guiding rods
    • 8mm

    • Frame:

    • vertical: 60*30 extrusion
    • horizontal: 30*30 extrusion
    • additional support by steel wires for structural regidityrigidity 
    • T-Nuts

    Electric: 

    • human interface 
      • housing
      • display
    • powersupply
      • lab bench powersupply

    Software:

    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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