Brand new um 2 - Jammed within 2 minutes cannot clear

[jemma-redmond 0]

Hi,

After buying a number of um 1's, cubex's etc we have been given a um2... afetr unboxing, following the procedure, etc I'm guessing it was too close to the plate or something, it's jammed again (just like the good old um1) and I'm not able to clear the nozzle.

Can anyone offer any advice?

I don't want to spend 90% of my time fixing ultimakers!

Thanks

Jem :-P

 

[donmilne 2]

What do you mean by "jam"? If you think the plate is too close to the nozzle then you should re-level, this time taking care to get the gap right (using e.g. paper as feeler gauge) at all three contact points. Instructions are in the user manual as I recall.

 

[jemma-redmond 0]

Hi Don,

There is no filament coming out. It's grinding away at the back. Raising the temperature to clear the nozzle makes no difference. Inserting a needle makes no difference.

The machine has gone back to the factory settings and keeps going through the setup but no filament comes out.

 

[DidierKlein 729]

Hi Jemma,

Are you sure that the filament is reaching the nozzle?

Have you tried feeding some filaments by the top of the nozzle (by removing the bowden tube)

The atomic method linked below show how to unclog a nozzle (you can follow the steps to feed by hand).

http://support.3dverkstan.se/article/10-the

Ps: you can raise the temp to 230°c 240°c no need to go up to 260°c at first (worth the try if it remains clogged)

 

[jemma-redmond 0]

Thanks guys! :-) that got it working..... does happy dance. :-P

 

[donmilne 2]

The filament occasionally catches on the entrance to the white (teflon) part of the hot end, given that the printer is new (AIUI), then that was probably the problem rather than dirt. You can avoid it in future by giving the filament a point rather a flat end.

I would avoid resorting to excessively high temperatures, as that can cause longer term issues.

 

[jemma-redmond 0]

Hi Unfortunately its jammed again... I've trying doing the above method but the filament won't even come out of the bowden tube. It's completely jammed... any ideas how to remove it without damaging the machine??

I also assume that there is a jam in the extruder itself which caused the problem in the first place. the only thing I can think that caused it, is printing low quality fast speed....

 

[jemma-redmond 0]

Btw new power connector at the back... really bad idea... It falls out and gets damaged way too easily.

 

[jemma-redmond 0]

Ok The jam's been fixed the above method really works well... it looks like the cause was that the reel was getting caught somehow... so I've freed it up to prevent that from happening again... the more you know...

 

[kristoffer 2]

Hey Jemma

I have had numerous problems with jamming, but replacing the stock feeder with this:

https://www.youmagine.com/designs/alternative-um2-feeder-version-two

will help a lot. Also print the friction less spool holder.

Also - after every print - clean the nozzle using the atomic method.

 

[CB1 0]

The filament occasionally catches on the entrance to the white (teflon) part of the hot end, given that the printer is new (AIUI), then that was probably the problem rather than dirt.  You can avoid it in future by giving the filament a point rather a flat end.

 

Excellent point(!)  We received our new UM2E+ today, and material would not come out.  Tried many things.  What fixed it was - cut a point on the end but also straighten it.

Off the spool the filament end has a curve.  We bent the last 2-3" (50-75mm) straight, cut a point on it, and that did the trick.