We use Lulzbot Cura at RCL due to its emphasis on stability and robustness. There is a computer setup near the 3D printers that is preconfigured with all the software you need to print on our printers.
Each 3D Printer at RCL has a raspberry pi running Octoprint on it. The URL for accessing the Octoprint server is located on that printers' wiki page. The login info will be physically located near the printer itself.
load an .STL file onto the printer computer
Open up Lulzbot Cura
Ensure you have the correct printer selected at the top
Configure your job and slice the model
Open up the Octoprint URL in your web browser and login to Octoprint
click "Upload GCode" and select your gcode file.
IMPORTANT! Be sure to watch the printer closely when it starts.
Make sure it homes and auto levels without issue
Make sure the first few layers are put down without issue
If there is any issue whatsoever, immediately turn the printer off.
Once the first few layers are completed without issue, feel free to leave the printer and watch it remotely via the Octoprint URL.
If you see any issues mid-print, please stop the print remotely via the Octoprint UI.