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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
    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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