UM2 Hot end assembly

[mark-hale 1]

Hi

I have just replaced the complete hot end on my UM2, so thats nozzle, teflon spacer, hot end isolator and spring.

Previously when re assembling the components I have screwed the hot end isolator into the nozzle as far as it can go. This time with the new components I have noticed that if I do this I then have problems with extrusion when inserting the new material. I slackened off the hot end isolator by about a 1/4 turn, this resulted in the filament flowing.

Are there any detailed guides on what the various settings/gaps should be on re assembly of the hot end?

Thanks

 

[tinkergnome 927]

...

Are there any detailed guides on what the various settings/gaps should be on re assembly of the hot end?

...

 

First choice should be the Assembly manual.

The interesting part begins on page 55/56:

 

turn the hot-end isolater until the teflon isolator part creates a gap of at least 1 mm and the bottom of the hot-end isolater is just not touching the messing part

[mark-hale 1]

First choice should be the Assembly manual.

The interesting part begins on page 55/56:

 

Cheers, didn't think to look at that. Looks like the "just not touching" is crucial or it seems to be with all the new parts

 

[tinydancer 0]

Post #20 in this thread shows you a picture of the exact assembly.

http://umforum.ultimaker.com/index.php?/topic/8513-underextrusion-need-help-with-this-one/&do=findComment&comment=80503