Hey everyone.

I built an mk3s+ from its kit form successfully, tested a few PLA prints with the stock 0.4 nozzle.

I’ve set prusaslicer to use a 0.6 nozzle now that I’ve upgraded, and am using PETG. Prints look pretty bad, in spite of calibrating z-offset etc.

If you were doing something like this for the first time, what would your setup steps be like?

To be specific, using a diamondback 0.6 nozzle, matterhackers PETG at 235c.

Issues I’m seeing are a really bad loss of detail, lots of stringing, etc.

eta: added a photo of a moderately post-processed part. Notice how rough the top surface looks, there’s a disconnect between perimeter loops, etc.

  • hoanbridgetroll@midwest.socialEnglish
    0·
    8 months ago

    Two things I’d suggest:

    Try another brand of PETG - I’ve heard weird things about MatterHackers PETG but never used it personally. Overture, Polymaker, Prusament, and Printed Solid PETG always behave consistently for me.

    Take a look at your heatblock and make sure you’re not leaking anywhere. I tried a 0.8 nozzle when I first got my MK3S+ and got bad results b/c I was leaking out the top and it was stringing badly. I eventually went with a Revo nozzle because swapping is so much simpler.

    • AnarchoSnowPlow@midwest.socialEnglish
      1·
      8 months ago

      +1 for overture, I’ve had very good luck with it. That said, I’m pretty sure PETG needs to be very dry in general. Prints beautiful just out of the box, but I have terrible stringing even storing everything sealed in vacuum bags after a few prints.