Ultimaker S5 Nozzle cleaning

[hodey 0]

Hello Makers of the Ultiverse,

 

I am using a S5 Printer for my work. After a couple of printings, the BB print core with
the PVA is on the outside of the nozzle black. It Looks a bit burned of the filament or some
dirt of the black tough PLA. I dont know. For this, I want to clean the nozzle. Do you
have some instructions how to clean it? Cotton swab with acetone maybe?

[Dim3nsioneer 559]

This is carbonized PVA. Best thing to my experience is to take it out and use either your finger nail or a brass brush in order to remove it.

 

[Nicolinux 288]

I'd just live with it. It will look the same after your next PVA print... I tried to keep the BB core clean all the time but I gave up at some point.

[cloakfiend 996]

I haven't used PVA that much, but if you want it to look a bit nicer, an easy thing to do is get a scalpel, or sharp blade and simply trim it off carefully, like shaving, obviously not cutting into the nozzle itself, should take you less than 10 seconds. I tend to hold the blade in my fingers rather than attaching it to the holder as it has less power that way. I tend to scrape any nozzle that looks like its building up an outer shell of pla, or whatever. Don't scrape the bottom though, just the sides. I've done that on my old UM2 for three years straight and had zero issues. Nozzle still looks like new.