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

Belt Tensioners

Recommended Posts

Hi Folks,

I may have missed it but my instructions for the Ultimaker Original + didn't seem to mention adding belt tensioners. I have them but I'm not really sure how to add them.

The only belt that seems to have an issue for me is the short one (vertical) that I believe controls the y axis movement. I can't see how I could add a tensioner to that belt because it looks like it would interfere with the range of movement.

Anyone have any thoughts on this?

Thanks in advance,



Share this post

Link to post
Share on other sites

When I first got my printer, I printed and used belt tensioners (on my long belts) before I realized I didn't actually need them. Your short belts should be adjustable per the instructions (2 mm deflection IIRC) using the four stepper motor mounting screws. If not, perhaps the holes could be slightly elongated to allow for the necessary adjustment.

I printed http://www.thingiverse.com/thing:34785 for a more controlled way of adjusting the X/Y short belt tension.


Share this post

Link to post
Share on other sites

The belt tensioners Are indeed for the long belts... I dont think theyll do any harm if you put them on, even if you dont think you need them now, the belts may become looser over time.

Just make sure the axis and slide blocks can move freely with the tensioners on

Share this post

Link to post
Share on other sites

... the belts may become looser over time.


Exactly why I removed mine. I didn't want to prematurely stretch them and on rare occasion one tensioner would collide with a slide block due to proximity.

The printer would also try to slide around the desk when I moved the print head while tensioners were mounted. Now it is perfectly smooth as long as I keep the rods clean.


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

    • Taking Advantage of DfAM
      This is a statement that’s often made about AM/3DP. I'll focus on the way DfAM can take advantage of some of the unique capabilities that AM and 3DP have to offer. I personally think that the use of AM/3DP for light-weighting is one of it’s most exciting possibilities and one that could play a key part in the sustainability of design and manufacturing in the future.
        • Like
      • 3 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!