Jump to content
Ultimaker Community of 3D Printing Experts

Weird diagnal line on sides of print

Recommended Posts



im using curaengine in repetier to slice and i get these lines on the sides of multiple prints. You can see it in the picture on the sloped area where the light is reflecting. i have watched it print and the head stops at those locations. they are not layer change marks nor are they, ummm ?row?, changing marks they are basically over extrusion from the head stopping. i found in the g code that the head moves on the x axis .001 mm at that spot. why does it do this? the stl file has a perfectly straight face and it even does it on calibration cubes



G1 F2700 X14.964 Y132.391 E6771.51457
G1 X14.963 Y132.337 E6771.51636
G1 X14.964 Y93.835 E6772.79694
G1 X14.963 Y93.778 E6772.79884
G1 X14.964 Y73.328 E6773.47901    


Share this post

Link to post
Share on other sites

So STL files can't do rectangles - they do triangles.  That's the edge of the triangle dividing that rectangle into 2 triangles. You can see it in the g codes above as well.


Your printer should not slow down so much at that spot.  You should get Marlin firmware.  Marlin looks at the angle change (which is either 0 degrees or close to it) and realizes it doesn't need to slow down (for a 10 degree angle change it only slows down a little).  Really really old firmware from like 7 years ago would stop at every vertex.  Just like your photo shows.

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

    • How to 3D print with reinforced engineering materials
      Ultimaker is hosting a webinar where we explain how you can achieve and maintain a high print success rate using these new reinforced engineering materials. Learn from Ultimaker's Product Manager of Materials and top chemical engineer Bart van As how you can take your 3D printing to that next level.
      • 2 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!