CNC mill JarBeRi

CNC Mill by Jarni, Benedik, Richard

Workflow:

Links: 

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

3D modeling:

• Everyone is working on their subassemblies.
• Work in private directories
• 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 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 Bed (work table):

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

Frame:

• use existing: ITEM Profile 6 30mmx30mm (0.0.419.06)

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