UM2 Hot End Pack part

[PibunJeh 0]

Hi,

I am wondering what I am supposed to do with the red rectangled part. I can't find it in any documentation...

Any hints?

Karsten

[gr5 2,229]

Before you re-attach the fan shroud put it in the hole that the nozzle will stick through - from above.  Once the nozzle is sticking through the hole it should be held in by the nozzle block.

It's never happened to me but sometimes a part comes loose during a print and although usually it's knocked over, sometimes it is stuck to the nozzle and carried around on the bed.  If in addition to these 2 bad things happening you ignore the print for an hour, you will get a massive glob of liquid filament and some of that can get up through into the head and clog everything up.  This tiny ring prevents this.  But again - 3 things have to go wrong for this to happen so it's a bit rare.

Edited September 2, 2015 by Guest