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OctoPrint + Motion Ubuntu 18.04 Setup Guide

Working in Ubuntu 18.04 LTS

Original OctoPrint Guide : https://discourse.octoprint.org/t/setting-up-octoprint-on-a-raspberry-pi-running-raspbian/2337

Description

This guide was created because following the original guide lead to some problems. Plus I wanted Ubuntu running Octoprint and a true webcam stream (not time-lapse photos). Performance is much better than a RaspPI.

Everything was configured in this order from a fresh desktop installation. I chose to autologon my main user because security isn't a real concern here. Desktop was chosen over Server because I wanted to use the computer for other clicky pointy things in my garage.

Updates

First thing's first, update:

sudo apt-get update && sudo apt-get -y upgrade

Install Drivers

This auto installer is really nice for getting all system drivers.

sudo ubuntu-drivers autoinstall

Allow USB Access

Add $USER to dialout group allowing USB / Serial access:

sudo adduser $USER dialout

Save .\config-files\50-myusb.rules to /etc/udev/rules.d/50-myusb.rules

Reboot: sudo reboot now

Install Octoprint

Directly from the guide. Installs latest version:

cd ~
sudo apt update
sudo apt install python-pip python-dev python-setuptools python-virtualenv git libyaml-dev build-essential
mkdir OctoPrint && cd OctoPrint
virtualenv venv
source venv/bin/activate
pip install pip --upgrade
pip install https://get.octoprint.org/latest

Then exit out of venv and start in terminal with:

~/OctoPrint/venv/bin/octoprint serve

Browse to http://0.0.0.0:5000/

GCODE

In OctoPrint, click the settings wrench and find GCODE. Then add these scripts as needed.

If scripts are not defined in the slicer don't forget to add them to octoprint. Also, on start, don't forget to wait on temp with M190 S70 ;bed temperature wait and M109 S220 ;extruder temperature wait. It works well after G28 ;home.

Start

G21 ;metric values
G90 ;absolute positioning
M82 ;set extruder to absolute mode
G28 ;home
G0 X20 Y20 F15000 ;bring extruder to the front
G1 Z25 F15000 ;move the platform down 25mm
G92 E0 ;zero the extruded length
G1 F150 E40 ;prime nozzle 40mm
G92 E0 ; zero the extruded length again
G0 X20 Y50 F12500 ; move head back

Print Complete

G91 ;relative positioning
G1 E-1 F200 ;retract the filament a bit before lifting the nozzle to release some of the pressure
G1 Z+5 E-15 F1500 ;move Z up a bit and retract filament even more
G28 ;Home
M84 ;steppers off
G90 ;absolute positioning
M140 S50 ;bed temperature don't wait
M106; Fans on full speed for nozzle cooling
M109 S90; Wait for temp to cool 
M107 ; Fans off

Print Canceled (Octoprint Only)

M107 ;fans off
G91 ;relative positioning
G1 E-1 F200 ;retract the filament a bit before lifting the nozzle to release some of the pressure
G1 Z+5 E-15 F1500 ;move Z up a bit and retract filament even more
G28 ;Home
M84 ;steppers off
G90 ;absolute positioning
M140 S70 ;bed temperature don't wait
M104 S100 ;extruder temperature don't wait

Simplify3D Default Start

M907 E1400 ; increase extruder current
G28 ; home all axes
G1 X20 Y10 F3000 ; bring extruder to front
G92 E0 ; zero the extruded length
G1 Z10 ; lower
G1 E19 F200 ; purge nozzle quickly
G1 E26 F60 ; purge nozzle slowly
G92 E0 ; zero the extruded length again
G1 E-5.5 F400 ; retract
G1 X190 Z0 F9000 ; pull away filament
G1 X210 F9000 ; wipe
G1 Y20 F9000 ; wipe
G1 E0 ; feed filament back

Simplify3D Default End

G28 X0 ; home the X-axis
M104 S0 ; turn off heaters
M140 S0 ; turn off bed
M84 ; disable motors

Motion / Configure Webcam

Install with:

sudo apt-get install motion
mkdir ~/.motion

Copy .\config-files\motion.conf into ~/.motion/

Reboot: sudo reboot now

Start in terminal with: motion

Browse to http://system.ip.address:8080 (not localhost)

System Startup

Create ~/startup

Move .\config-files\startup\ to ~/startup/

Assign Execute Permissions:

chmod u+x ~/startup/start_motion.sh
chmod u+x ~/startup/start_octoprint.sh

Test with:

cd ~/startup
./start_motion.sh
./start_octoprint.sh

Browse to Startup Applications and add these scripts.

Conclusion

If everything was successful, issue a reboot. When the server reboots, OctoPrint should be running at http://0.0.0.0:5000 and a webcam stream should be running at http://system.ip.address:8080

Optional (not tested)

Install NetGear Wifi Drivers : https://ubuntuforums.org/showthread.php?t=1806839

About

Just a guide to remind myself when I have to do it again.

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