Failed prints

A selection of failed prints 🙁

I am getting to know everything about my Ultimaker 3d printer. Although there’s a lot of discussion online about how to manage problems with printing, it’s a steep learning curve especially if you don’t know exactly what’s wrong – nor the language to describe it!

Sometimes prints can stop for no apparent reason – maybe the print head got blocked up, or the filament was slightly wonky. Today I finally figured out how to restore a failed print – the instructions aren’t online so I didn’t even know this was possible! Read on to find out how.

Note: This is a setting on my Ultimaker 2 Extended, I don’t know if the same settings will be available on your machine.

  1. Fix the original problem. Extrude a little bit of plastic (using Move Material) to make sure the printer is working again.
  2. Sand down the top of your model to remove any nubs of plastic that might interfere with the new layer attaching.
  3. Find the Z height. Using the toggle wheel, navigate to Settings > Expert Functions > Move axis. Move your nozzle to exactly above your model, anywhere will do. Make a note of the Z height. Be careful because the nozzle doesn’t move as quickly as your toggle wheel, so you risk colliding with your model. Turn off the power immediately if this happens and then restart, home the head and buildplate.
  4. Start printing where you left off. Navigate to Settings > Expert Functions > Recover print. Select your model and then enter the height you noted down. The printer will take an inordinately long time to recover – maybe 2mm / min. Keep an eye on it when it restarts to make sure that it is attaching back onto your model.

Completely simple! But only if you’re told.

Postscript: In practice this didn’t work for my vessels. The walls are too thin to create a good bond between the two halves. It would likely work on a more solid model though.

Leave a comment

Your email address will not be published. Required fields are marked *