GRBL

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To compile GRBL and upload to the Arduino

• Download GRBL: https://github.com/grbl/grbl/archive/master.zip
• unzip grbl-master
• Open Terminal.
• Set the following environment variabels (i.e. run these commands in the terminal):
  • export AVRPATH=/Applications/Arduino.app/Contents/Resources/Java/hardware/tools/avr
  • export DEVPATH=/dev/tty.usbmodem1411
    • (note: DEVPATH should match the name of your currently connected arduino. you can find this from arduino software under Port selection)
  • export GRBLHEX=grbl.hex
• Add the avr compiler's to your PATH. type this into the terminal: export PATH="$PATH:$AVRPATH/bin"
• Change to the grbl directory: cd ~/Downloads/grbl-master
  • change ~/Downloads to match the path where you downloaded.
• Compile GRBL. In the grbl-master director, type: make. GRBL should compile.
• Upload GRBL to the arduino. From the grbl-master directory, run: $AVRPATH/bin/avrdude -C$AVRPATH/etc/avrdude.conf -pm328p -carduino -P$DEVPATH -D -Uflash:w:$GRBLHEX

adapted from here: https://github.com/grbl/grbl/wiki/Flashing-Grbl-to-an-Arduino

How to connect pins of Arduino for GRBL

https://github.com/grbl/grbl/wiki/Connecting-Grbl

What the GRBL settings mean, and how to change them

• https://github.com/grbl/grbl/wiki/Configuring-Grbl-v0.8

GCode Command Reference

These are the standard GCode commands implemented by GRBL:

• https://github.com/grbl/grbl/wiki

My GRBL defaults

$0=28.175 (x, step/mm)
$1=28.175 (y, step/mm)
$2=250.000 (z, step/mm)
$3=10 (step pulse, usec)
$4=17780.000 (default feed, mm/min)
$5=17780.000 (default seek, mm/min)
$6=56 (step port invert mask, int:00111000)
$7=25 (step idle delay, msec)
$8=500.000 (acceleration, mm/sec^2)
$9=0.050 (junction deviation, mm)
$10=0.100 (arc, mm/segment)
$11=25 (n-arc correction, int)
$12=3 (n-decimals, int)
$13=0 (report inches, bool)
$14=1 (auto start, bool)
$15=0 (invert step enable, bool)
$16=0 (hard limits, bool)
$17=0 (homing cycle, bool)
$18=0 (homing dir invert mask, int:00000000)
$19=25.000 (homing feed, mm/min)
$20=250.000 (homing seek, mm/min)
$21=100 (homing debounce, msec)
$22=1.000 (homing pull-off, mm)
<pre>
== current 20130320 ==

Grbl 0.8c ['$' for help] G20ok G91M3ok $0=7.000 (x, step/mm) $1=7.000 (y, step/mm) $2=250.000 (z, step/mm) $3=100 (step pulse, usec) $4=20320.000 (default feed, mm/min) $5=65000.000 (default seek, mm/min) $6=56 (step port invert mask, int:00111000) $7=25 (step idle delay, msec) $8=1800.000 (acceleration, mm/sec^2) $9=0.050 (junction deviation, mm) $10=0.100 (arc, mm/segment) $11=25 (n-arc correction, int) $12=3 (n-decimals, int) $13=1 (report inches, bool) $14=1 (auto start, bool) $15=0 (invert step enable, bool) $16=0 (hard limits, bool) $17=0 (homing cycle, bool) $18=0 (homing dir invert mask, int:00000000) $19=25.000 (homing feed, mm/min) $20=250.000 (homing seek, mm/min) $21=100 (homing debounce, msec) $22=1.000 (homing pull-off, mm) </pre>