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-

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