Jump to content

Print time goes down when print speed decreases?


nritch

Recommended Posts

Posted · Print time goes down when print speed decreases?

Hi everyone,

I have been messing around with settings on Cura to see what kind of effects occur in an attempt to find optimal print settings. However, I noticed something unusual when changing the outer and inner shell speeds that I have been unable to find an explanation for. When lowering these settings below their default values, print time actually decreases instead of increasing.

For example, when the outer shell at 30 mm/s the estimated print time is ~9 minutes. But when the print speed is lowered to 10 mm/s, the print time decreases to ~6 minutes without changing any other settings. These predicted times are matched by my observations of the printers speed- it seems to print noticeably faster on 10 mm/s than on 30 mm/s.

As I said, I have been unable to find an explanation for this phenomena elsewhere on the net. The best explanation I can think of is that the this a glitch; perhaps a decimal point is being added to low numbers (i.e. 10 mm/s actually translates to 100 mm/s etc.). I would greatly appreciate if anyone can lend some insight to this!

  • Link to post
    Share on other sites

    Posted · Print time goes down when print speed decreases?

    What version on Cura?

    Can you post an image of the model you're printing?

    Things like acceleration, jerk speeds as well as minimum layer times can affect the time to print a model - as well as it's size.

  • Link to post
    Share on other sites

    • 2 weeks later...
    Posted · Print time goes down when print speed decreases?

    That is strange. I tried it with Cura 15.x and got logical results: 5min for 30mm/s and 11mins for 10mm/s

    Unless the 'Cool -> Minimum Layer' time is set to something really large (or small), I can't explain it other than there is something wrong with Lulzbot's version of Cura.

  • 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 Universal Cura Projects in the UltiMaker Cura 5.7 beta
        Strap in for the first Cura release of 2024! This 5.7 beta release brings new material profiles as well as cloud printing for Method series printers, and introduces a powerful new way of sharing print settings using printer-agnostic project files! Also, if you want to download the cute dinosaur card holder featured below, it was specially designed for this release and can be found on Thingiverse! 
          • Like
        • 10 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...