Replacement Nextruder Motor and Planetary Gear  

RE: Replacement Nextruder Motor and Planetary Gear

typically, Prusa do not sell components like the Nextruder motor and gearbox, whilst they are still trying to clear backlogs in orders. 

It is likely that these components will become mainstream as time progresses. 

the Nextruder is based in an epicyclic gearbox, 

Stepper motor manufacturers can supply motors with epicyclic gearboxes... if that helps you, 
Alternatively other suppliers sell extruders with gear boxes, which may help you whilst you wait for Prusa to come available

https://www.orbiterprojects.com/orbiter-v2-0/

regards Joan

RE: Replacement Nextruder Motor and Planetary Gear

Thanks for reaching out!

So far I haven't found a similar analog to the gearbox but found a pretty close motor from Printedsolid.com that looks promising. Might have to do a hybrid that will fit in the mk4 nextruder, some micro Swiss concepts maybe with a larger gear attachment  or try to build a gearbox from random parts I find online to be really close to mk4 gear box

I appreciate the guildance and ideas! I'll keep looking too, to find a epicyclic gearbox that's close. I'd rather not try to make it or do a hybrid setup.

printed solid motor: https://www.printedsolid.com/collections/prusa/products/ldo-nema-17-motor-pancake-ldo-42sth25-1404

RE: Replacement Nextruder Motor and Planetary Gear

I might also look into this as well to making a copy: https://www.instructables.com/Planetary-Gear/

RE: Replacement Nextruder Motor and Planetary Gear

Prusa only sells the Nextruder for the XL at a price of about 640€. Quite a lot.

However, the cheapest way to get a complete Nextruder is to buy the mk3.9 upgrade kit if you want to upgrade a mk3 to mk3.5. This might be interesting if you already upgraded an mk3 to a better extruder (like the zOrbiter 2.0) with Revo hotend and have already a print quality quite near the mk4 and only want to upgrade controller and display.

Actually I am in this situation, so for about 280€ more than the mk3.5 upgrade I might buy the mk3.9 upgrade instead. However, I also have to find a way to crimp the adapter cables.

While the Nextruder has a very uniqe design, the Galileo 2 feeder is also quite nice. It also uses a planetary gear with low backslash. It might be possible to integrate the Galileo 2 into the metal frame of the Nextruder, so you could still use the load cell and the Nextruder hotends. Would be nice to use on other printers, as the (standard-flow) Nextruder nozzles do a good job unloading filament with a nice tip to reload it again (for mmu3 or other filament changers), while you could use the Nextruder-Adapter+Highflow nozzle (or even Volcano+HighFlow CHT) for single colour prints for single colour prints.

RE: Replacement Nextruder Motor and Planetary Gear

Posted by: @oliver-andre

While the Nextruder has a very uniqe design, the Galileo 2 feeder is also quite nice. It also uses a planetary gear with low backslash. It might be possible to integrate the Galileo 2 into the metal frame of the Nextruder, so you could still use the load cell and the Nextruder hotends. Would be nice to use on other printers, as the (standard-flow) Nextruder nozzles do a good job unloading filament with a nice tip to reload it again (for mmu3 or other filament changers), while you could use the Nextruder-Adapter+Highflow nozzle (or even Volcano+HighFlow CHT) for single colour prints for single colour prints.

Galileo is unique.