I figured 3D printing is the act of creation because it's additive... So CNC is the act of destruction. So what better way to show it's destructive force than a Demon. This is the Demon from the movie Legend. I back lit it with Red LED's and connected it to the 24 VDC power supply via a 24 VDC to 12 VDC stepdown transformer. So it lights up when the controller turns on.
The push buttons controls are easy to hook up and use. I use the ABORT button as an E-STOP. But good practices and experience means less need for one. The Pause and resume buttons are nice for long carves that need to be paused at night and resumed in the morning. The Abort is Pin A0, the Feed Hold is Pin A1, and the Resume is Pin A2. You just need momentary push buttons connected on one side to those pins and the other side can all be connected together and go to GND. I used an 18/4 cable to have all 4 contained inside one nice jacketed cable leading to a remote box.
I started out by deciding the best way to lay out the TB6600 drivers was with their cooling fins all lined up and in order. That way one fan can blow past all of them for cooling. I also come from an electrical cabinet design background so I keep to the good practice of only one wire per barrier strip or terminal block connection if at all possible. Also with grounding, all motor and limit switch cables are shielded. To ground a shielded cable correctly, you only ground it on one end, the control box end. Also, all grounds should have the same potential so I tapped the 120 VAC ground off the power supply to also tie into the box. You’ll see in the schematic that all grounds are tied to each other.
DESIGNS BY PHIL, LLC
Main components list:
· (4) TB6600 drives (Approx. $15 each)
· (1) Arduino Uno Rev 3 (Approx. $30)
· 24 VDC 16 amp Power Supply (I used the Inventables power supply)
· (1) Adafruit Proto Screw Shield (Approx. $15)
· (5) 12 Position Barrier Strips W/ Jumpers (Approx. $12)
· (3) 0.47uF Capacitors for Limit Switch Noise Filter
· Lots of 18 awg stranded (22 awg will probably work for the signal only connections)
· 2 lengths of 12-14 awg stranded for main power to the drivers
· Wire Duct or Some Form Of Wire Management
· 24 VDC Fans or 12 VDC W/ a Step Down Transformer
For the Adafruit (or similar) proto screw shield, I utilized the prototyping part to make a quick replacement area for the 0.47uF capacitors. The capacitors connect from Pin 9 to GND, Pin 10 to GND, and Pin 12 to GND. The screw shield portion makes it very easy to connect all wires. There are versions that don’t require soldering on Amazon, but I don’t mind the soldering. You’ll have to come up with a mount for the Arduino. I used a hacked apart box from my original X-carve Gshield enclosure.