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

Extruder going backwards!!

Recommended Posts

Hi Guys,

I am new her so please be gentle with me. I built my UM 1 yesterday and my Extruder motor only seems to extrude in one direction, backwards. its drawing the filament out of the tube instead of driving it towards the hot end.

Has anyone ever had this problem before. I have tried every thing to fix this but with no joy.

Any help would be great.

Thanks fellas,

Andy out.........for now.


Share this post

Link to post
Share on other sites

I've seen a couple of people that have had a problem where the leads were inserted in the wrong order on the connector. I took a quick, terrible photo of my connector. It's an old machine but I assume it's still the same on the new ones.


Switching the leads around isn't too terribly difficult. If you look at the opposite side of the one shown in this photo you will see some metal through openings in the case. Use a needle or some other sharp tool and carefully press on these metal tabs while tugging on the corresponding lead. They should pop out without too much resistance. Then simply put them back in the correct order. If they refuse to stay in the connector all you have to do is bend the little barbs (that you pressed down on with the tool) back into shape.


Share this post

Link to post
Share on other sites

The easiest fix is to swap two wires in that cable Robert showed you. The connector may be correct yet the motor wired wrong. There are 2 pairs of wires. Each pair goes to a coil in the stepper. You can swap the two wires in either pair but don't swap the wires in one pair for the wires with another. So swap the green/black pair *or* the red/blue pair.

Another solution is to go here and build the default ultimaker configuration but swap the checkbox for the extruder direction (uncheck "invert axis"):



The problem with this solution is that Cura comes with updates to Marlin occasionally and you have to keep rebuilding your own custom copy of Marlin.


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 | People
      The goal of this contest is to design a set of people figurines that could be used in such a project to make an area, office or mall seem populated. 
      Think of different types of people in different environments, like walking people, people standing still, working people, and both men and women.
      • 31 replies
    • 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!