Prusa I3 Mk3S Upgrades

Now that I have had my Prusa I3 MK3S 3d printer for 4 months I have had an educational time upgrading the unit with aftermarket add-ons promoted by the 3d printing community. Obviously, one of the neatest aspects of the unit is that it can print it’s own upgrades!

Modified Duct Fan

Prusa Delta P Duct Fan Upgrade

The stock shroud that comes with the base kit was flimsy and chunks were occasionally meting off and falling in my prints. I stumbled upon the Delta P duct fan upgrade in a Reddit post. You can download the info and plans here. At the start I printed it and installed this fan configuration because I thought it simply looked really cool, but I’ve come to the opinion that this configuration is superior to the base configuration that comes with the printer. I do believe the fan runs quieter, is more structurally stable, and that it does a more precise job of ducting the air to the nozzle base.

Silicone Sock

Aftermarket 3d Printer Hot End Silicone Sock

I read about these after fixing a clog in my E3D V6 hot end a few weeks ago. The aftermarket hot end Silicone Sock runs about $8 and is well worth a try. The silicone sock keeps your hot end insulated, keeps it clean, and prevents against stray filament curling around, sticking to the hot end and the associated risk of creating a filament blob. There is a small risk the silicone sock could come lose and fall into your print during operations, but to date mine is fastened snugly on the hot end without issue since installation. In my opinion the silicone sock has done a great job to keep the hot end clean and in general improves the quality and reliability of the print.

Silicone Sock

Filament Extrusion Visualizer

The last upgrade I’ve made is a filament extrusion visualizer. This add-on is more aesthetically fun than anything else, but does have some minor functionality by quickly enabling you to observer how the extruded is operating at any given time.

The Prusa Extruder Visualizer tutorial has mostly windmill and screw type designs, but I chose to go with a nostalgic wind up toy configuration, but there are many fun Options to choose from. I’ve seen YouTube videos where the windup knob appears to crank in time lapse videos which also adds a pleasing visual effect. (Tinkering with 3d printing time lapse is on my to do list)

The set up is simple. You print your extruder visualizer, and then take a tiny Neodymium magnet (8x3mm) and super glue it to the printer extrusion visualizer componen. The magnets make for interchange options.

3d printer extruder visualizer

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