CNC router build

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CNC Mill

Release status: experimental [box doku]

Description
Author(s)  Tarwin
Last Version  v0.1

We want to use the big-ass CNC portal Thomas rescued from the trash to build a CNC router.

Goals

  • Mill Aluminium!
  • route PCBs
  • be open for extensions, easy tool change

Hardware

Motor System

X & Y Motors

Z Motor

Motor controllers

Power supplies

Motor cabeling

Z axis

  • 1 = U
  • 2 = V
  • 3 = W
  • 4 = NC
  • 5 = break brown cable
  • 6 = break white cable

X axis

  • 1 = U
  • 2 = V
  • 3 = W
  • 4 = NC
  • 5 = NC
  • 6 = NC

Endstops

X & Y

  • Type unknown
  • Seems to be an Solid-state Auto Switch, not just a Reed sensor, same pinout as the SMC

Z

  • SMC D-F9H (datasheet) (Solid-state Auto Switch, works like a PNP transistor)
  • Omron EE-SX870p Photomicrosensor (datasheet)

Electrical

  • all endstops can be driven with 5 to 24V.
  • Pinout is: brown: VCC / blue: GND / black: Signal
  • Pinout on X: brown: VCC / green: GND / white: Signal
  • all have a red led which goes out if they sense something
  • Some input here

Endstop RJ45 connector

  1. - Signal Z-
  2. - Signal Z+
  3. - VCC (5-24V) (Brown)
  4. - Signal Y-
  5. - GND (Orange)
  6. - Signal Y+
  7. - Signal X+
  8. - Signal X-

List Left Sub D 25 Pol connector

  1. - 1 Red Cable Driver X
  2. - 2 Black Cable Driver X
  3. - 3 Green Cable Driver X
  4. - 4 Gray Cable Driver X
  5. - 5 Red Cable Driver Y
  6. - 6 Black Cable Driver Y
  7. - 7 Green Cable Driver Y
  8. - 8 Gray Cable Driver Y
  9. - 9 Red Cable Driver Z
  10. - 10 Black Cable Driver Z
  11. - 11 Green Cable Driver Z
  12. - 12 Gray Cable Driver Z
  13. - 13 Free
  14. - 14 Endstop Blue Cable RJ45=4 -> Signal Y-
  15. - 15 Endstop Blue/White Cable RJ45=5 -> Signal Y+
  16. - 16 Endstop Orange Cable RJ45=2 -> Signal Z+
  17. - 17 Endstop Orange/White Cable RJ45=1 ->Signal Z-
  18. - 18 Endstop Green Cable RJ45=6 ->Signal Y+
  19. - 19 Endstop Green/White Cable RJ45=3 ->VCC (5-24V)(Brown)
  20. - 20 Endstop Brown Cable RJ45=8 -> Signal X+
  21. - 21 Endstop Brown/White Cable RJ45=7 -> Signal X-
  22. - 22 Free
  23. - 23 Free
  24. - 24 Free
  25. - 25 Free

List Right Sub D 25 Pol connector

  1. - 1
  2. - 2
  3. - 3
  4. - 4
  5. - 5
  6. - 6
  7. - 7
  8. - 8
  9. - 9
  10. - 10
  11. - 11
  12. - 12
  13. - 13
  14. - 14
  15. - 15
  16. - 16
  17. - 17
  18. - 18
  19. - 19
  20. - 20
  21. - 21
  22. - 22
  23. - 23
  24. - 24
  25. - 25

Software

CNC_router_software_eval


Sub-projects

Fix up portal

  • The portal needs to put together and fixed up
    • Put portal together, replace belt - done
    • identifiy / Test endstops - done
    • Build portal frame - in progress (Thomas E)
    • Try Z axis brake - done


Frame and table

  • The X Axis is raised, the linear bearing runs far above the tool head. This implies a high center of gravity.
  • Frame needs to be very stable
    • Old workbench?

First draft:

Fraestischv1.jpeg

Tool head

  • needs to be powerful (Aluminium) and precise (pcbs)
    • Find matching Spindle with driver and cooling - done
    • Bought this: 2.2kw wassergekühlte Frässpindel
    • This can be controlled manually on the inverter or over serial.
    • needs its own fuse and a fault current fuse (FI Schutzschalter)
    • Technical data:
      • 2.2kW / 8,000 - 24,000 RPM
      • ER20 spring collets (Spannbuchsen)
      • Driver: HY02D223B
      • water cooled

Software & Controller

  • What will tell the drivers what to do? PC/parallel port, Mikrokontroller, old CNC hardware, ...
  • Hardware? What do we need?


Pictures

Last picture of the portal before it ware put apart and brought to the space

Cnc-mill-put-together.jpg