Jump to content
Ultimaker Community of 3D Printing Experts
Blake215

My UMO+ will not print a perfect circle

Recommended Posts

I have an UMO+ and it will not print a good circle on the factory settings. Therefore, I tried the nickel calibration test on thingiverse, to calibrate my X and Y axis, I have done it over 11 times, and have followed the instructions to change the steps/mm. However, nothing I have done has fixed this problem solar, and it is very difficult to make accurate prints if my printer cannot make a circle. If anyone can help please let me know what I need to do. image1.thumb.JPG.333347aaa947cd2bddbb95ebdf72c38e.JPGimage2.thumb.JPG.14f06a22f3c33fbfd0091bf3530179c0.JPG In these photos the rectangle at the top is supposed to be square and the oval thing direct under it is supposed to be a circle.

image1.thumb.JPG.333347aaa947cd2bddbb95ebdf72c38e.JPG

image2.thumb.JPG.14f06a22f3c33fbfd0091bf3530179c0.JPG

Share this post


Link to post
Share on other sites

Also check and recheck the calibration. On umo+ mxl belts at some speeds it's easier to see even a small error in calibration (I mean even a half millimeter).

On the long run. Print and install twisterblocks by chopmeister and if you really care about precision ditch the bad umo/umo+ mxl pulleys and upgrade to gt2 (the ones um2 uses). I changed my 3 machines to that (two on the assembly day) and it's just fantastic (slightly better but noticeable).

About t gt2 upgrade on umo/umo+

https://ultimaker.com/en/community/15874-mxl-vs-gt2-print-results

A better side blocks:

https://www.youmagine.com/designs/twisterblocks

Share this post


Link to post
Share on other sites

You probably have a bit of backlash caused by loose belts:

http://support.3dverkstan.se/article/23-a-visual-ultimaker-troubleshooting-guide#circles (UM2 is pictured but it applies to your UMO as well)

 

Thank you, I did what you said and it really helped. After tensioning those belts I followed the instructions on this link, http://blog.mcmelectronics.com/post/3D-printer-calibration#.VoMYr4RlngG ,to calibrate my X and Y axis and I now have perfect circles.

Share this post


Link to post
Share on other sites

Also check and recheck the calibration. On umo+ mxl belts at some speeds it's easier to see even a small error in calibration (I mean even a half millimeter).

On the long run. Print and install twisterblocks by chopmeister and if you really care about precision ditch the bad umo/umo+ mxl pulleys and upgrade to gt2 (the ones um2 uses). I changed my 3 machines to that (two on the assembly day) and it's just fantastic (slightly better but noticeable).

About t gt2 upgrade on umo/umo+

https://ultimaker.com/en/community/15874-mxl-vs-gt2-print-results

A better side blocks:

https://www.youmagine.com/designs/twisterblocks

 

That would probably be the best long term solution. That will be the next upgrade that I add to my UMO+. Thank you for the help.

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.
      • 1 reply
    • "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!