CNC router build

   

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

• Berger-Lahr VRDM3913 50LNBOO

Z Motor

• Berger-Lahr VRDM368 50LNBOB
  • brake needs 24V to loosen, works.

Motor controllers

• 3x JMC 3M860

Power supplies

• 3x 70V 400W from China

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
15. - 15 Endstop Blue/White Cable
16. - 16 Endstop Orange Cable
17. - 17 Endstop Orange/White Cable
18. - 18 Endstop Green Cable
19. - 19 Endstop Green/White Cable
20. - 20 Endstop Brown Cable
21. - 21 Endstop Brown/White Cable
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:

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?
  • Main page for this: CNC_router_software_eval

Pictures

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