CNC
CNC Mill or computer numerical controlled milling device is used for automatically milling or cutting away at materials like wood, plastic, or softer metals such as aluminum based on a 3D computer model.
Akin to a 3D Printer, the CNC provides the ability to work with objects in x, y, and z dimensions. However, it provides subtractive manufacturing, rather than additive.
The sudo room sign by the intercom at the old 22nd st entrance was milled on such a machine!
The Noisebridge wiki contains much knowledge about using CNC mills for example TO MILL CIRCUITBOARDS: https://noisebridge.net/wiki/MaxNCMill#Toolchains
A big CNC machine with short Z height that we presently have
- JacksMill Jack gave us his CNC mill which we used to cut wood. It should also be able to cut soft metal like aluminum. It is located at the west wall, next to the robot control cabinet.
SHAPEOKO
https://jayscustomcreations.com/2015/02/shapeoko-2-cnc-mill/
there is a large CNC machine suitable for soft materials like soft wood and plastic (and possibly harder materials?) located under the table in the southwest corner of sudoroom. It's made of wood and acrylic, and the wood is painted white. Nicholas cleaned it really well but inside there was still a rats nest, and they had chewed through some of the wires. Presently the XYZ stuff is working fine with a 12V power supply, but the DC motor controller for the spindle is pretty dirty from rats and the wiring from the 48v power supply to it (and e-stop and speed control) are all disconnected right now. A bench power supply could operate the spindle very easily though.
When plugged into the USB of a computer, it presents as
/dev/serial/by-id/usb-Arduino__www.arduino.cc__0043_7533531343735110F120-if00
this software CANDLE2 seems to work to move it around, but
the machine's Grbl settings are not calibrated, so it thinks a centimeter is about 8mm!!!!!
Connecing to it at 115200 baud, when pressing the reset button it says this:
Grbl 1.1f ['$' for help]
after $ and $$ queries, these are the responses:
[HLP:$$ $# $G $I $N $x=val $Nx=line $J=line $SLP $C $X $H ~ ! ? ctrl-x]
ok
$0=10
$1=25
$2=0
$3=0
$4=0
$5=0
$6=0
$10=1
$11=0.010
$12=0.002
$13=0
$20=0
$21=0
$22=0
$23=0
$24=25.000
$25=500.000
$26=250
$27=1.000
$30=1000
$31=0
$32=0
$100=250.000
$101=250.000
$102=250.000
$110=500.000
$111=500.000
$112=500.000
$120=10.000
$121=10.000
$122=10.000
$130=200.000
$131=200.000
$132=200.000
ok
here is an incorrect Grbl Configuration on archive.org
here is some info on configuring Grbl v0.8
here's a page about Grbl v1.1 which we have
It runs GRBL firmware. Commands such as "X10" or "Y-20" or "X15 Y20 Z15" work to move things around. There is no command for spindle control because it's not connected to the board.
The XYZ movement motor controller is a gShield (grblShield) V5 arduino shield
A CNC Mill we no longer have
https://www.youtube.com/watch?v=AIGDspzMHD0
We had a small CNC Mill as of January 2015. It was donated by Pam and was traded away for a Quick Circuit 5000 (in the 3D printer area) It was a myDIYCNC link cnc thing
