Jump to content
Ultimaker Community of 3D Printing Experts
Sign in to follow this  

Broken UM2? - please help :)

Recommended Posts


One of my UM2s just doesn't want to print correctly. Please see the following pictures of the classical Stretchlet which do not exactly look good.

IMG 0227

IMG 0228

IMG 0229

I have tried everything I can think of. Re-slicing, changing PLA, adjusted the feeder, played around with temperature, reduced the fan speed, etc. Even did a factory reset but still no luck.


I have printed more than hundred of these without any issue earlier.


Anybody have any thoughts on what can be wrong?


Ps. The machine is about 3 months old.


Share this post

Link to post
Share on other sites


Had a print turn out like that before because I accidentally hit ABS when changing out PLA material. In other words, it printed the PLA project at 260. Really screwed things up, oozing and stringing everywhere, under extrusion because the filament was just being pushed into a puddle of liquid plastic in the extruder, etc...

I'm sure one of the big dogs will chime in with some useful info


Share this post

Link to post
Share on other sites

@Peter Parnes: For me it looks as if your UM2 has a problem with the correct z position. The top of the third bracelet seems to have been printed too high up. Do you see any unusual behavior on the z stage?

Are the bracelets actually printed at their locations shown in the pictures?


Share this post

Link to post
Share on other sites

For me it looks as much to high temperatures would come to use.

The fine stringing and the deformed areas indicate very high temperatures. Probably a wrong profile is selected, or the temperature sensor is faulty. After all, no Under-extrusion is recognizable.


Please check the function of the printer nozzle / heater and temperature sensor.

Use the menu item: HEATUP NOZZLE, on the device and select different test temperatures. Please compare the set temperatures, with for example an oven meat thermometer.


Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

  • Our picks

    • Ultimaker Cura | a new interface
      We're not only trying to always make Ultimaker Cura better with the usual new features and improvements we build, but we're also trying to make it more pleasant to operate. The interface was the focus for the upcoming release, from which we would already like to present you the first glance. 
        • Like
      • 16 replies
    • "Back To The Future" using Generative Design & Investment Casting
      Designing for light-weight parts is becoming more important, and I’m a firm believer in the need to produce lighter weight, less over-engineered parts for the future. This is for sustainability reasons because we need to be using less raw materials and, in things like transportation, it impacts the energy usage of the product during it’s service life.
        • Like
      • 12 replies

Important Information

Welcome to the Ultimaker Community of 3D printing experts. Visit the following links to read more about our Terms of Use or our Privacy Policy. Thank you!