Brass Nozzle Cleaning.  

RE: Brass Nozzle Cleaning.

To clean the nozzles, simply leave them installed in the extruder and heat them to approximately 230 degrees.

You can then use a wire brush to remove the soft filament, leaving them looking like new.

There are a few reasons why excessive filament may accumulate on the nozzle.-

• The flow rate is too high
• The filament is not dry
• The retraction speed or retraction distance is too small/low

RE: Brass Nozzle Cleaning.

Echo the above. I use the same nozzle for years (just PLA) and it looks completely clean even though I've never touched it! I do check and use needle nose pliers to pick off any plastic immediately after any print though...... lol, but saying that, even that's rare. I do find PETG more 'messy' to work with though - but then again, I never really dry filament.....

RE: Brass Nozzle Cleaning.

While hot, as mentioned above. Been using round tip tweezers for years, grab any ozze before/after the print and anything left on the nozzle. Don't bother with a brass brush.

KNIPEX - 92 64 43 Tools - Precision Tweezers, Chrome (926443)

https://www.amazon.com/KNIPEX-92-64-43-Precision/dp/B005EXOULI/ref=sr_1_9?crid=2YJPX87OH8M53&dib=eyJ2IjoiMSJ9.0kjijJEeSE89t9o1ptQVFoOs2jyiHHEQwh-A5DELnRTsFMRjjRpSPIPAJvc25N0JI31wESXc2AS7DX_wXBcBDrVglgbqM0t00QQ7V0ZVIHsCKbzJIk79yL8mAOhyKcda1izXWAsqOC10xQyVfgxmDus7V5QMrVO9VRgHA7sZgAz1DLWBHN0m8e3DptbYppmWEgRsdkpuoB6lSgtcMe4hWlgHO7WhzsDcqV5uoDtbD6He4o3mirr_o87cnkid861p0Kd9C_YjFY9XPB8dqm_w78hpxNcAOYruWtpwL2wRhf8.eAcGiRVgfLe3-9fVvHtb1zrIgOGYwgMapUJMF8QLhdo&dib_tag=se&keywords=knipex+tweezers&qid=1765206330&sprefix=knipex+tweezers%2Caps%2C151&sr=8-9

RE: Brass Nozzle Cleaning.

So we heat to 230z… then what?

RE:

My suggestion is to go on to Printables, find a Core One nozzle wiper (there are a ton of these, just pick your favorite) and use it to automatically scrub the nozzle between printers. 

This is one I created to specifically to be out of the way and also work with BIQU Cryogrip sheets: Core One Universal Nozzle Wiper Use the right-hand version if you have the Core One+ automatic vent upgrade. 

Why Prusa doesn't have this as standard (everyone else does) is beyond me...

RE:

>> soak a brass nozzle in that will EAT PLA or PETG

Regarding "out of it": Have you checked "Cold pull" procedure? It's easy to find a better explanation than I could write up here in a few lines so I won't try (in a nutshell, the trick is that moderately hot PLA gets extremely sticky). Surprisingly efficient.

RE: Brass Nozzle Cleaning.

Remove the material stuck to the nozzle

Posted by: @nickatnight

So we heat to 230z… then what?