eTextile-Laser

Notes

This project is based on waste reuse and recycling of an obsolete laser cutter commercialized dy www.proeltsi.com in the 90s The rebuild of the electronic is based on Arduino Uno running GRBL 1.1 extended with a custom shield connected on an raspberry-pi ruinng LaserWeb4. This industrial laser cutter is now fully operational.

### GRBL

#### Building the firmware

##### Clone GRBL source repository

````shell
git clone https://github.com/gnea/grbl.git

Enter GRBL source

cd grbl

Check out appropriate version & create a branch for it

git checkout -b etextile-laser v1.1h.20190825

Apply GRBL patch

git apply ../grbl-config.patch

Build GRBL firmwate

make

avr-gcc is needed for building the firmware

Flash GRBL firmware on an Arduino Uno R3

make flash PROGRAMMER="-c arduinon -p m328 -P /dev/ttyACM0"

avrdude is needed for flashing the firmware

Configuring the firmware

These settings commands should be sent to the GRBL firmware only once after (re)flashing, they are saved in EEPROM.

Invert port directions for X & Y axis

$3=3

Enable hard limits

$21=1

Enable homing cycle

$22=1

Invert homing directions for X & Y axis

$23=3

Increase homing seek rate

$25=2000

Enable laser mode

$32=1

Set steps/mm for X axis

$100=64

Set steps/mm for Y axis

$101=154

Increase max rate for X axis

$110=2500

Increase max rate for Y axis

$111=2500

Increase acceleration for X axis

$121=15

Increase acceleration for Y axis

$122=15

Set max travel for X axis

$131=1000

Set max travel for Y axis

$132=500

Links

GRBL

https://github.com/gnea/grbl

https://github.com/gnea/grbl/wiki/Grbl-v1.1-Configuration

https://github.com/gnea/grbl/wiki/Grbl-v1.1-Laser-Mode

https://github.com/gnea/grbl/wiki/Two-Axis-System-Considerations

https://github.com/gnea/grbl/wiki/Wiring-Limit-Switches

Misc

LinuxCNC "G-Code" Quick Reference