Jump to content
UltiMaker Community of 3D Printing Experts

volumetric netfabb?


Recommended Posts

Posted · volumetric netfabb?

I've heard rumors about a volumetric netfabb update... does anybody have any details, especially when this might come?

(I have issues with the speed scalability of my current netfabb profiles, meaning it prints ok at 100%, but not enough extrusion at 200%, and needs manually adjusted in the live tuning window)

related: live tuning the speed and extrusion doesn't relate in faster printing (printing netfabb code via repg26b1), it seems there is a brickwall of what netfabb and marlin think as the max extrusion per sec. if i bring the printing speed to 200% and wait 2 sec for the printer to catch up, and then increase the extrusion rate (to match an imaginary factor), the tool head speed gets slower to get to the requested extrusion rate, instead of simply spinning the motor faster (nowhere near the max yet). also a thin (0.5mm) at medium speed (100mm/s) prints much faster (guestimate 2x) than a medium (0.6mm) at medium (100mm/s) speed (which makes no sense to me at all).

  • Link to post
    Share on other sites

    Posted · volumetric netfabb?
    I've heard rumors about a volumetric netfabb update...

    I've been working on something sorta like that for a while but work (the work that pays my mortgage, not the work where I get to play with 3D printers) keeps getting in the way - only so many hours of coding I can do in a day before my brain turns to jello! Next Friday is probably my last work day this year (woot!) so I'd be reeeeally suprirsed if I didn't have something at least partially working in the next few weeks.

    No idea if netfabb themselves are working on such a thing, too. If not, they should be. It's the way to go!

  • Link to post
    Share on other sites

    Posted · volumetric netfabb?
    What exactly would a volumetric profile do for a print?

    For a print? Nothing much..

    The short answer is that "volumetric" has come to mean calibrating via math instead of via trial & error - the software calculates the volume of threads it wants drawn then does a bit of math to figure out the right amount of filament to pull *into* the extruder to get that volume. Once you get a bit of setup done, you can just tell it any layer height or thread width or speed you want and it figures out what to do with the extruder.

    I was just posting about this (in the skeinforge context) over in the mbi google group so I'll copy/paste that here..


    The basic idea is that slicers used to output gcode that talked about extruder speed and x/y/z coordinates separately - it was stuff like "Start the extruder at speed A. Move to position B at feedrate C. Move to position D at feedrate C. Stop the extruder." over and over in the gcode.


    With the dimension plug-in, those two separate commands merged into one single gcode command - this was "5D" since each line of gcode told the firmware how far to move in X, Y, Z and E (extruder) as well as saying how fast (time) the move/extrusion should be. The problem with this was that the E part of that command referred to extrusion length out of the nozzle and, for a given specific volume of plastic, that length can vary based on nozzle size, flow rate, temperature, plastic formula and 97 other things.


    With volumetric 5D (SF40), that troublesome E component changed to specify the length of raw filament into the extruder drive. Because the slicer (SF) knows the volume of threads it's outputting (h * w * l) and now knows the diameter of your filament (from the Dimension tab), it can very exactly calculate how much filament needs to go into the extruder to draw the correct shape/size line in the the correct amount of time.


    So.. Volumetric 5D slicers like SF40+ are frickin' awesome, since there's no more screwing around with calibration cubes to get the flow rate to match the feed rate. You want to print at a different layer height? Just change the layer height and you're done. Want different thread widths? No problem - just change w/t and SF figures out the right flow rate. It's really quite nice.

  • 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

      • 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
        • 13 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
        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...