Jump to content

How can I make my Ultimaker more accurate?


dylanweber

Recommended Posts

Posted · How can I make my Ultimaker more accurate?

I'm planning on printing a lot of gears, nuts, bolts, etc. I already printed a set of nuts and bolts but they fit somewhat tight, while some gears and axles I've printed barely fit together and do not spin as intended. Upon measuring a 10 mm cube, I get 9.79 * 9.64 * 10.18 mm. Is there any way to improve these dimensions? These results are consistent throughout prints and all pulleys have been tightened as much as humanly possible.

 

  • Link to post
    Share on other sites

    Posted · How can I make my Ultimaker more accurate?

    This has to do with shrinking of the plastic. If you increase your model with a certain factor (depending on the plastic, and yes, even the color) it should be correct.

     

  • Link to post
    Share on other sites

    Posted · How can I make my Ultimaker more accurate?

    There are many things that influence the exact dimensions of parts. Printed out some small gears this weekend ( small modiefied gears for the UM1 extruder) and they looked very, very good. On one of them you could even see very small polygons.

    Lowering the temperature, for example makes parts a little smaller: Increasing it makes them a little bigger. If you want to check yourself print a gear and lower or hincrease the temperature 5 °C or so and look at the flanges of the printed gear. They won´t be exactly straight.

    Sufficient cooling is important, too. If you still have problems with the nozzle smearing small parts, print more than once at a time to give each layer more time to cool down before the next. For ABS a heated chamber is recommended, for PLA it might work without.

    If the parts aren´t exactly round, check the tension of all your belts, especially the short ones. I avoided this by changing to direct drive, but if your belt tension is right a normal and good tuned UM1 is able to print really good results. I was really surprised what detailgrade is possible, with these machines. But it requires a lot of tweaking and tuning and some experience. For small gears I would also lower the printing speed to 20mm/s or even lower.

    Hope this helps a little. Of course calibration is important, but the standard values are pretty exact. Never changed mine and got some really exact results.

    And yes of course shrinkage is also a main factor and as Nallath described the easiest way to compensate is via scaling in Cura.

     

  • Link to post
    Share on other sites

    Posted · How can I make my Ultimaker more accurate?

    On the scaling front, I got decent results using a 1.02 scaling factor over X and Y. I tried my hand printing some Lego compatible blocks that that got almost every dimension where it needed to be.

     

  • 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

      • UltiMaker Cura 5.7 stable released
        Cura 5.7 is here and it brings a handy new workflow improvement when using Thingiverse and Cura together, as well as additional capabilities for Method series printers, and a powerful way of sharing print settings using new printer-agnostic project files! Read on to find out about all of these improvements and more. 
         
          • Like
        • 7 replies
      • S-Line Firmware 8.3.0 was released Nov. 20th on the "Latest" firmware branch.
        (Sorry, was out of office when this released)

        This update is for...
        All UltiMaker S series  
        New features
         
        Temperature status. During print preparation, the temperatures of the print cores and build plate will be shown on the display. This gives a better indication of the progress and remaining wait time. Save log files in paused state. It is now possible to save the printer's log files to USB if the currently active print job is paused. Previously, the Dump logs to USB option was only enabled if the printer was in idle state. Confirm print removal via Digital Factory. If the printer is connected to the Digital Factory, it is now possible to confirm the removal of a previous print job via the Digital Factory interface. This is useful in situations where the build plate is clear, but the operator forgot to select Confirm removal on the printer’s display. Visit this page for more information about this feature.
          • Like
        • 0 replies
    ×
    ×
    • Create New...