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myCNC

A low cost diy mill cnc. The original idea was create a mill cnc to create my own pcb's (naive of me).

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Initial specifications

  1. Easy to mount
  2. Mostly 3D printed parts (better as fewer different parts be) (5 differents 3D pinter parts)
  3. Standard and cheap material to buy (it's why I don't use an aluminum profiles)
  4. Dremel as mill machine
  5. Basic electronics easy to buy and cheap one's
  6. Standard stepper motors, NEMA 17
  7. Total price lower than 100€ (wish)(excluding the Dremel machine)
  8. Presition for mill PCBs
  9. Milling material: wood, cooper, aluminium
  10. Open source code (as Marlin)
  11. Work surface > 10x10x2cm 17.5x13.5x2cm

Inspiration projects

Shopping list (107€)

Qty Concept Estimated price
1 Arduino Mega 5€
1 Ramp1.4+LCD 20€
5 Stepper motors NEMA17 35€
2.5-3m Calibrated rods 8mm 9€
50cm threaded rod 3€
- Bearings, gears and some screws 8€
- Gear belt 2€
1 Coil of PLA (or what you want) 25€
1 Dremel 50€

Some CNC & Milling basics

Marlin configuration

Must change the following points:

  • ...

some examples

Weaknesses

  • Low rigidity (specially in Y axis)
  • Backlash as old 3d printer
  • Low movements (as expected)
  • Poor rpm control (as expected)
  • Dificulties to calibrate well the Z axis in all plane
  • The work surface must be higher that machine suport, and there's not easy way to subject objecto to mill without use screws

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