Jump to content
Ultimaker Community of 3D Printing Experts
Giddi

How to properly clean Z-axis?

Recommended Posts

I am experiencing some problems regarding the z-Axis of my UM2. First I had skipped layers and now banding gets worse and worse. When I move the bed up and down manually, can feel resistance almost every 1-1,5 cm. I already tried cleaning it with a simple cloth and afterwards regreasing with the provided grease, but it didn´t help.

Is there some way to completly clean the Z-axis? Special cleaning solution? special cleaning "brush"? Do I have to change the bearings?

Share this post


Link to post
Share on other sites

Having a bit of new grease will loose any dry bits and help with cleaning. You can hold a cloth on the screw near the build plate and raise the build plate with the other hand. This will make the screw rotate and help in wiping inside the threads. You can then use a clean piece of cloth and do the same underneath. Then apply a small amount of new grease.

I think your problem maybe with the linear bearings on the 2 guide shafts. Do not grease these but you can test them to see if one is causing your issue.

You need to remove the cover and unscrew the bearing from the build plate. then slide just the bearing up and down the shaft to see if there are tight spots.

To change the bearings you unscrew the black plate underneath the machine and slide the rod out. then you can remove the bearing.

Share this post


Link to post
Share on other sites

and check if your z-nut has any play.

Changing to a proper z-nut can fix your problems.

If the z-nut has some play and the bearings 'hang', you will get banding. You can simulate this by pushing a little underneath the bed when the bed moves to the next layer. The next layer is printed on the same height as the former layer due to the play of the z-nut, until the end of the play is reached. I think you can have crappy bearings with a good working z-nut....

I bought some at http://www.technobotsonline.com/tr8x2-travelling-nut-for-threaded-rods.html

Share this post


Link to post
Share on other sites

I think you can have crappy bearings with a good working z-nut....

Totally true. But also, on my umo+ that I changed the bearings for misumi (the cheapest model) and now it moves like silk. But true, if the bed nut haz close to zero play it can move the bearings no matter what and the z 'fall' disappears, but (before changing the bearings) I saw some visible differences when doing small layers like 0.06, there was a small banding on the bad areas, for 0.2 layers the banding did banish.

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

    • Introducing Ultimaker Cura 3.6 | Beta
      Ultimaker Cura 3.6 | Beta is available. It comes with new features, bug fixes, and UX improvements. We would really like to have your feedback on it to make our stable release as good as it can be. As always, you can download the beta for free from our website, for Windows, MacOS, and Linux.
        • Like
      • 95 replies
    • Print Core CC | Red for Ruby
      Q: For some users, abrasive materials may be a new subject matter. Can you explain what it is that makes a material abrasive when you are not sure which print core to use?
      A: Materials which are hard in a solid piece (like metals, ceramics and carbon fibers) will generally also wear down the nozzle. In general one should assume...
        • Like
      • 30 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!