Jump to content
Ultimaker Community of 3D Printing Experts
Sign in to follow this  

UM2 Loose Front X-Axis Belt - solved

Recommended Posts

I recently received my UM2, and the bottom of the front X-axis belt is very slack. It jumps around visibly while printing. Is there any procedure for equalizing the tension on the top and bottom of the belt?


It might be worth mentioning that the Y-axis rod had actually come out of the black boxes during transit, but only enough that it made the X-axis endstop switch miss the black box, thereby smashing the X-axis into the left side of the unit as it tried to home.


IMG 20140416 200300IMG 20140416 200311


Share this post

Link to post
Share on other sites

Thanks, I'll give that a try. I'd read the same procedure elsewhere, but wanted to make sure it wasn't going to radically move one end of the gantry out of alignment.

Yes, I did manage to fix the other problem. The Y-axis rod had slipped out of the bottom of both the front and back rod retainers which resulted in the rear retainer canting slightly forward (less than 1mm). Unfortunately this was just enough to make it miss the limit switch, which led to a few painful moments of my clamouring for the off switch.


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
Sign in to follow this  


  • Our picks

    • Architect Design Contest | Vehicles.
      We're open for entries! - Design and submit your 3D designs of architectural entourage - vehicles - for a chance to win a large filament pack. Presenting an idea, an architectural design or something as big as an urban project isn't easy. A scaled model can really help to get your idea across.
        • Like
      • 24 replies
    • What The DfAM?
      I'm Steve Cox, an experienced engineer familiar with 3D printing. I wanted to share some DfAM guidelines with this community to help and make stronger parts.
      I'm also an Autodesk Certified Instructor for Fusion 360, so many of the images in ...
        • Thanks
        • Like
      • 23 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!