Jump to content
Ultimaker Community of 3D Printing Experts
Bad_Mechanic

Wall thicker on curved sections

Recommended Posts

While doing some tests and calibrations on my printer, I realized the wall thickness is thicker on curved sections of the wall, while the wall thickness is as expected on straight sections. This poses a particular issue when printing something with a hole in it, as the hole ends up being smaller than designed. It's not much, only about 0.15mm, but it's enough to sometimes be an issue.

 

Any thoughts on why I might be seeing that?

Share this post


Link to post
Share on other sites
16 hours ago, Bad_Mechanic said:

While doing some tests and calibrations on my printer, I realized the wall thickness is thicker on curved sections of the wall, while the wall thickness is as expected on straight sections. This poses a particular issue when printing something with a hole in it, as the hole ends up being smaller than designed. It's not much, only about 0.15mm, but it's enough to sometimes be an issue.

 

Any thoughts on why I might be seeing that? 

 

Here's a couple of possibilities...

 

Obviously, when you print a curve, the distance along the inside edge of the curve will be shorter than on the centre line or outside edge of the curve and so the extruded filament will tend to expand in the inwards direction.

 

Another effect will be the (printer firmware and settings dependent) momentary slow down of the nozzle as it changes direction at each vertex in the curve which will tend to thicken the line.

Share this post


Link to post
Share on other sites

With reference to the hole rather than the wall thickness... 3D printers do not print circles, they print straight lines. Lol end of really. The line cuts across the arc so the radius is smaller. No way around that really apart from compensating in your design if dimensional accuracy is important and you have a tight tolerance.

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
      • 130 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!