Jump to content

Speed test vase-mode (ChangeAtZ question)


Zbyszko

Recommended Posts

Posted · Speed test vase-mode (ChangeAtZ question)

I'm trying to print a "speed tower" in vase mode.  Want to adjust the print speed up every 5mm of the tower.  I used Cura's ChangeAtZ post-processing plug-in to change the print speed.  Unfortunately it has no effect and I suspect this is due to the fact that wall speed is a multiple of print speed.  Any way to work around this so I can print my tower?  Is there a way to change the print speed to wall print speed multiplier from 0.5 to 1 somewhere?  Thanks!

  • Link to post
    Share on other sites

    Posted · Speed test vase-mode (ChangeAtZ question)

    First of all realize that there is a minimum layer time feature.  I think it defaults maybe to 5 seconds per layer so that may be restricting the speed.  You can turn that feature off.  This keeps the quality up because it looks all melty if you don't let the previous layer cool a little.

     

    Cura has gotten complicated.  There are about 8 printing speeds.  I would try a few things:

    1) Try setting most of them to 0.  In the old cura (15.X.X) if you set the speed to 0 it would just not set the speed at all. 

    2) Open the gcode file in a text editor.  It's quite easy to look at.  Look for "F" commands.  Those set the speed in mm/minute (60X larger than mm/sec).  Note that anytime it does a non printing move it has to change the speed.  Note that anytime it does a retraction it has to change the speed (extruder speed is different from XY axis speed).  So you may have to disable all retractions and set the non-printing moves to speed 0 or to the same speed as the printing speed?  Not sure.  Hopefully in vase mode there are none of these.

     

  • Link to post
    Share on other sites

    Posted · Speed test vase-mode (ChangeAtZ question)

    Doesn't ChangeZ alter the feedrate factor instead of the "speed" itself? So it affects all the "speed" with a ratio. 

    Could you look at if the output gcode has M220 in it? 

    If there is, please check if your firmware has M220 support.

     

  • Link to post
    Share on other sites

    Posted (edited) · Speed test vase-mode (ChangeAtZ question)
    On 2/17/2019 at 8:58 AM, alexjx said:
    On 2/16/2019 at 9:19 AM, gr5 said:

    First of all realize that there is a minimum layer time feature.  I think it defaults maybe to 5 seconds per layer so that may be restricting the speed.  You can turn that feature off.  This keeps the quality up because it looks all melty if you don't let the previous layer cool a little.

     

    Cura has gotten complicated.  There are about 8 printing speeds.  I would try a few things:

    1) Try setting most of them to 0.  In the old cura (15.X.X) if you set the speed to 0 it would just not set the speed at all. 

    2) Open the gcode file in a text editor.  It's quite easy to look at.  Look for "F" commands.  Those set the speed in mm/minute (60X larger than mm/sec).  Note that anytime it does a non printing move it has to change the speed.  Note that anytime it does a retraction it has to change the speed (extruder speed is different from XY axis speed).  So you may have to disable all retractions and set the non-printing moves to speed 0 or to the same speed as the printing speed?  Not sure.  Hopefully in vase mode there are none of these.

     

     

    Thanks for taking the time to reply.  I did have min layer time turned to 0.  I did check the F commands and all layers were the same.  No retractions since printing in vase mode.  

     

    Quote
    On 2/17/2019 at 8:58 AM, alexjx said:

    Doesn't ChangeZ alter the feedrate factor instead of the "speed" itself? So it affects all the "speed" with a ratio. 

    Could you look at if the output gcode has M220 in it? 

    If there is, please check if your firmware has M220 support.

     

     

     

     

    You are correct.  Firmware is Repetier 1.0x which I believe does have M220 support.  I did try printing the square tower using manual feedrate control on the printer itself which worked but I learned that the printer doesn't like to take corners at a high speed (they show significant degradation beyond 40mm/s) so for this test I think I need to switch to a cylinder tower.

     

    Still would like to know how to do this automatically if anyone has any other input.  Much thanks!

    Edited by Zbyszko
  • 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 5.3 stable released
        In this stable release, Cura 5.3 achieves yet another huge leap forward in 3D printing thanks to material interlocking! As well as introducing an expanded recommended print settings menu and lots of print quality improvements. Not to mention, a whole bunch of new printer profiles for non-UltiMaker printers!
          • Thanks
          • Like
        • 56 replies
      • 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
        • 18 replies
      • UltiMaker Cura 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
        • 30 replies
    ×
    ×
    • Create New...