Jump to content
Ultimaker Community of 3D Printing Experts

Bead width varies with print speed

Recommended Posts


I see the bead width varies with print speed and I'm looking for an explanation.



The object:


  • materiaal: PLA
  • nozzle diameter: 0,4 mm
  • object width: 2,4 mm
  • wall thickness: 1,2 mm (i.e. the half of the object width, so ni infill is applied)
  • prints speed 20, 60, 120 en 180 mm/s


Two questions:

• We expect 6 beads with a width of slightly more than 0.4 mm. Printed are 7 beads. Why?

• The wires are printed from the inside (road 1) to the outside (road 7) printed. The beads do not have a constant width as the print speed varies. Road 1 (the inside) is very wide at high print speeds and narrower at lower printing speed. I think this is only possible if the central bead comes out extremely slow out of the nozzle and its neighbors on the other hand extremely fast. I'd rather have expected a constant bead width on all seven beads. Do you have an explanation for this?


Share this post

Link to post
Share on other sites

Are you altering the temperature when you adjust the print speed.

You can't expect to change the print speed without adjusting the temp and get the same width lines.

I find it hard to understand your pictures and explanation but to answer your first question I think it's due to the initial layer height which is effecting how many beads you end up with. But I'm not sure.

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

  • 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
      • 122 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!