Electronics

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Controll electronics

• Our very own GRBL shield for fabricatable machines

Control firmware

• Grbl on arduino
• Redeem on beaglebone black

OctoPrint with Grbl Plug-In (...in progress...)

Required Materials

• Raspberry Pi
• Raspberry Pi Wifi Adapter (only needed if you are not using a Raspberry Pi 3 with a built-in WiFi module)
• Power cord for Raspberry Pi
• Control Board

What To Do

There is a brief and good tutorial on how to setup OctoPi on the OctoPrint website, a portion of these instructions paraphrase that tutorial.

• The first step is to download the latest version of OctoPi from the link given above.

• Unzip the file and install the contained .img file to an SD card. Alternatively, use a flashing program like Etcher.

• Configure your WiFi connection by editing octopi-wpa-supplicant.txt. The file can be found on the root of the flashed card. NOTE: it is important not to use WordPad (Windows) or TextEdit (MacOS X) when editing the file because they can mangle formatting.
  • Enter WiFi network
  • Change country

• Insert the micro SD card into your Pi.
• Plug in the Pi's power cord.
• It is now strongly recommended you change the password to your Pi, instructions to do so can be found in "SSH into Pi" below.
• You can now access the Pi through http://octopi.local.

Grbl Plugin

• Download plugin on OctoPrint.
  • Go to http://octopi.local -> "Settings" -> "Plugin Manager" (located on left sidebar) -> "Get More" -> search for "Grbl" and download. (You might need to press the settings icon and select "Refresh list from Repository" in order to be able to search)

• You now need to change some settings for the Grbl plugin to work.
  • "Settings" -> "Serial Connection" -> "Firmware & protocol" -> Set "Send a checksum with the command" to "Never"

• "Settings" -> "Serial Connection" -> "Firmware & protocol" -> Scroll down to "Protocol fine tuning" -> Expand "Advanced options" -> Set "Hello command" to "M5"

• "Settings" -> "Serial Connection" -> "Behavior" -> "Error handling" -> Set "What to do on a firmware error (Error: or !!)" to "Ignore"

Other octoprint plugins we recommend

• Autoselect uploaded files
• Dark theme

Troubleshooting WiFi

You may encounter some issues connecting to the WiFi network. I recommend troubleshooting by booting the Pi while connected to the network through an ethernet cable.

• Hook Raspberry Pi up to the network using an ethernet cable.
• SSH into Pi
• Check network
• Change WiFi settings
• Useful Links
  • https://www.makeuseof.com/tag/setup-wi-fi-bluetooth-raspberry-pi-3/
  • http://www.circuitbasics.com/how-to-set-up-wifi-on-the-raspberry-pi-3/

SSH into Pi

• Log into the Pi via SSH.
  • Enter "ssh [email protected]" into your terminal window. PICTURE
  • The default username is "pi" and the default password is "raspberry".
  • NOTE: It is recommended that you change the password using the passwd command.
  • Also can change password with sudo raspi-config.
• https://www.raspberrypi.org/documentation/remote-access/ssh/

Setting up webcam (..more..)

Other Useful Commands

sudo halt to shutdown Pi