Prusa MK3S+

Members must complete the Intro to Filament 3D Printing Class before using this tool

Asmbly has three Prusa i3 MK3S+ 3D Printers. As of now, these are the recommended 3D printers for new users and will be covered in the Intro to 3D Printing class. These printers live to the left in the printing enclosure. The one on the left is named Apollo, and the middle is named Hermes, and the rightmost is Sunwukong.

ASMBLY Prusa i3 MK3S+ Printers

Apollo Status Active Manufacturer Prusa Model i3 MK3S+ & Pi 3B Nozzle Size 0.4mm Nozzle Type Hardened Steel Nozzle Count 1 Filament Size 1.75mm Print Volume 250 x 210 x 210mm Max Bed Temperature 122C Max Nozzle Temperature 295C Max Print Speed 100mm/s Extruder Type Direct Manual Unknown Control Interface Octoprint, Device Screen & Buttons Network Address http://apollo-printer.local/

Hermes Status Active Manufacturer Prusa Model i3 MK3S+ & Pi 4B Nozzle Size 0.4mm Nozzle Type Hardened Steel Nozzle Count 1 Filament Size 1.75mm Print Volume 250 x 210 x 210mm Max Bed Temperature 122C Max Nozzle Temperature 295C Max Print Speed 100mm/s Extruder Type Direct Manual Unknown Control Interface Octoprint, Device Screen & Buttons Network Address http://hermes-printer.local/

Sunwukong Status Active Manufacturer Prusa Model i3 MK3S+ & Pi 4B Nozzle Size 0.4mm Nozzle Type Hardened Steel Nozzle Count 1 Filament Size 1.75mm Print Volume 250 x 210 x 210mm Max Bed Temperature 122C Max Nozzle Temperature 295C Max Print Speed 100mm/s Extruder Type Direct Manual Unknown Control Interface Octoprint, Device Screen & Buttons Network Address http://sunwukong-printer.local/

The printers are controllable over Octoprint, which you can use the web browser or an app to connect to while on the ASMBLY network. You cannot access these machines from home. Tasks such as preheating and filament changes can be done via the built-in panel on the front bottom of the printer. The Octoprint configuration is the standard OctoPi installation, consisting of the Raspberry Pi 3 or 4 being attached to the back of the printer frame, connected via USB to the printer and via Ethernet to the ASMBLY network (WiFi connection from the Pi to the network is currently unstable), with the OctoPi 1.0.0 (build 2023.10.09.151442) stable image installed on the Pi. In an attempt to keep the printers as easily serviced and maintained, we are trying to keep the installation as standard as possible. More documentation about OctoPi can be found here. Files for printing replacement Pi 3B and Pi 4B cases can be found at the page bottom.

Login information: The username is "User", and the password is the ASMBLY WiFi password (Look around the space for plaques that state this information, or find a steward).

Revo Hotend Upgrade

All three Prusa i3 mk3s+ printers have been upgraded with the E3D Revo hotend (from the stock E3D V6). They are all equipped with the 0.4mm abrasion-resistance ObXidian nozzles. Please do not change the size of the nozzles. We upgraded to the Revo to improve ease of maintenance and reliability of the printers, but do not currently have a system to support nozzle size changes.

Ignore messages about a firmware upgrade warning- the printers had to be downgraded to Firmware 3.12 in order to use the Revo nozzles. We have not yet been able to get the newest firmware working with Revo (including the Revo specific firmware).

Maintenance

Due to the Octoprint installation on the printers, take extra care to make sure not only the main power cable is unplugged from the printer, but also the ethernet cable and the USB power cable connected to the Pi mounted to the back-upper-left corner of the printer when moving the printer around or out of the enclosure. Remember to reconnect these later.

Rebooting Procedure

In order to fully reboot the printer and the Octoprint server attached to it, power off the Pi at the back-upper-left of the printer by toggling it's inline power switch, and turn the printer off using the power switch on the power supply unit at the back of the printer. Then toggle the power supply unit switch back on, and then turn the Pi back on. The Octoprint page should be reachable in under one minute.

Because the Octoprint servers are now installed individually to each printer, it is safe to reboot a printer and Octoprint without disrupting the other printers in operation. This was not the case with the previous printers.

Resources

• User Manual
• Octoprint - Configuration and install
• Pi 4 Case with Prusa i3 Mounting
• Pi 3 Case with Prusa i3 Mounting

Maintenance

This tool is owned by Asmbly Makerspace for the use of its members. Please contact the workshop committee if maintenance is required.