Jump to content
UltiMaker Community of 3D Printing Experts

G Code Print Speed Slower Then Requested Print Speed


burgs04
 Share

Recommended Posts

Posted (edited) · G Code Print Speed Slower Then Requested Print Speed

Dialing in speed settings for my printer and noticed that the speed shown in the g code file is only giving me 60% of the requested print speed.

 

So if the speed settings are set to 200 mm/s.  I slice and save the file.  Open the g code file and the speeds will only be 120mm/s.

 

Anyone have any ideas?

 

 

Also how do I change the Z axis speed?  It's at 3mm/s at the moment.

Edited by burgs04
  • Link to post
    Share on other sites

    Posted · G Code Print Speed Slower Then Requested Print Speed

    A couple of things here.  The print speed is governed in part by the minimum layer time.  Cura will make adjustments to try and hit the minimum time if your print speed causes a layer to finish too quickly.  It's a cooling thing.  You will run into that a lot when you use Spiralize (vase mode).

     

    Consider:  Your print speed is 60mm/sec and your minimum layer time is 10 seconds.  You have a layer that indeed takes 10 seconds at 60mm/sec.  If you raise your print speed to 2000mm/sec but leave the minimum layer time at 10 seconds, that layer will still print at 60mm/sec.

     

    As Obewan says, the "Z-Hop Speed" (found in the Cura Speed settings) pretty much governs the Z speed BUT the maximum that Cura will allow you to enter in Z-Hop Speed is "machine_max_feedrate_z" which may be set in your printer definition file.  You can change machine_max_feedrate_z in the "Printer Settings" (which needs to be loaded from the MarketPlace) which has a box for "Maximum Speed Z".  You can set Maximum Speed Z to whatever you want.

     

    The real limit to Z speed is in your firmware in M203.  No matter what you enter in Cura, when it gets to the printer the numbers in M203 will be the upper limit for each axis.  You should enter the M203 numbers into Cura.  There is no way that Cura can query the printer to pull those values.

  • Link to post
    Share on other sites

    Posted (edited) · G Code Print Speed Slower Then Requested Print Speed

    @GregValiant I have minimum layer time set to 0 as this was an issue not long ago when printing in vase mode.  I had to disable print recovery and set minimum layer time to 0 to get vase mode to work correctly.  Minimum layer time is still set to 0.

     

    I can't think of anything that would affect the entered print speed vs g-code print speed.

     

    No matter what speed I set its always exactly reduced by 40% (or 60% of set speed).

     

    If I enter 500 mm/s I get 300.

    If I enter 100 I get 60.

    If I enter 224 I get 134.4

     

    The only time it deviates from the 60% is if the set speed is really low.  Sub 50 mm/s.

     

    Is this a bug or is there something else that's reducing the speed?

     

     

    Also.  Downloaded "Printer Settings" last night.  I will play around with that and report back.

    Edited by burgs04
  • Link to post
    Share on other sites

    Posted · G Code Print Speed Slower Then Requested Print Speed

    Use "File | Save Project" and post a 3mf here.

    What printer?

    What operating system?

    What version of Cura?

     

    I haven't heard of a "60% rule" before.  I'm not saying it isn't a bug but if it is one this is the first time I can recall it coming up.  Maybe one of the developers like @nallath or moderator @gr5 has seen something like it before now.

  • Link to post
    Share on other sites

    Posted · G Code Print Speed Slower Then Requested Print Speed

    Well...... I'm an idiot......

     

    So the 60% I was seeing in the g-code was actually the requested speed (500 mm/s) x 60 (seconds) = 30000 mm/m.

    • Like 1
    Link to post
    Share on other sites

    Posted · G Code Print Speed Slower Then Requested Print Speed

    Welcome to the club.

    • Like 1
    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
     Share

    • Our picks

      • Here it is. The new UltiMaker S7
        The UltiMaker S7 is built on the success of the UltiMaker S5 and its design decisions were heavily based on feedback from customers.
         
         
        So what’s new?
        The obvious change is the S7’s height. It now includes an integrated Air Manager. This filters the exhaust air of every print and also improves build temperature stability. To further enclose the build chamber the S7 only has one magnetically latched door.
         
        The build stack has also been completely redesigned. A PEI-coated flexible steel build plate makes a big difference to productivity. Not only do you not need tools to pop a printed part off. But we also don’t recommend using or adhesion structures for UltiMaker materials (except PC, because...it’s PC). Along with that, 4 pins and 25 magnets make it easy to replace the flex plate perfectly – even with one hand.
         
        The re-engineered print head has an inductive sensor which reduces noise when probing the build plate. This effectively makes it much harder to not achieve a perfect first layer, improving overall print success. We also reversed the front fan direction (fewer plastic hairs, less maintenance), made the print core door magnets stronger, and add a sensor that helps avoid flooding.
         

         
        The UltiMaker S7 also includes quality of life improvements:
        Reliable bed tilt compensation (no more thumbscrews) 2.4 and 5 GHz Wi-Fi A 1080p camera (mounted higher for a better view) Compatibility with 280+ Marketplace materials Compatibility with S5 project files (no reslicing needed) And a whole lot more  
        Curious to see the S7 in action?
        We’re hosting a free tech demo on February 7.
        It will be live and you can ask any questions to our CTO, Miguel Calvo.
        Register here for the Webinar
          • Like
        • 10 replies
      • UltiMaker Cura 5.3.0-Alpha 🎄 Tree Support Spotlight 🎄
        Are you a fan of tree support, but dislike the removal process and the amount of filament it uses? Then we would like to invite you to try this special release of UltiMaker Cura. Brought to you by our special community contributor @thomasrahm
         
        We generated a special version of Cura 5.2 called 5.3.0 Alpha + Xmas. The only changes we introduced compared to UltiMaker Cura 5.2.1 are those which are needed for the new supports. So keep in mind, this is not a sneak peek for Cura 5.3 (there are some really cool new features coming up) but a spotlight release highlighting this new version of tree supports.  
          • Like
        • 17 replies
      • New here? Get ahead with a free onboarding course
        Hi,
         
        Often getting started is the most difficult part of any process. A good start sets you up for success and saves you time and energy that could be spent elsewhere. That is why we have a onboarding course ready for
        Ultimaker S5 Pro Bundle, Ultimaker S5, Ultimaker S3 Ultimaker 2+ Connect.   
        They're ready for you on the Ultimaker Academy platform. All you need to do to gain access is to register your product to gain free access. 
        Ready? Register your product here in just 60 seconds.
          • Like
        • 14 replies
    ×
    ×
    • Create New...