6 ms·

I’d like to see some close ups of the prints. In the video you can see the print bed vibrating like crazy, and each layer can’t be anywhere near solid if there’

I’d like to see some close ups of the prints. In the video you can see the print bed vibrating like crazy, and each layer can’t be anywhere near solid if there’s a tenth of the time to cool, even with a fan. I wonder if you could have a something that squirts a fine jet of liquid nitrogen, just behind the print head? Expensive though I suppose.

jaclaz 9y ago
>I wonder if you could have a something that squirts a fine jet of liquid nitrogen, just behind the print head? Expensive though I suppose. Maybe - just a semi-random idea, mind you - a Ranque-Hirsch (or Vortex) tube (and a source of compressed air) would be enough and possiby be more practical: https://en.wikipedia.org/wiki/Vortex_tube https://en.wikipedia.org/wiki/Vortex_tube
- louithethrid 9y ago
  Add Peletier elements to that, cooling the air to cool, heating the filament to print.
lbotos 9y ago
Also though depends on the need right? If I'm making a 3-d print of something that I just want to see a very rough mockup in space, I might trade accuracy for speed if it goes from an hour to < 10 min.
- jaclaz 9y ago
  >Also though depends on the need right? If I'm making a 3-d print of something that I just want to see a very rough mockup in space, I might trade accuracy for speed if it goes from an hour to < 10 min. Yep, coincidentally I was just reading today about a "crazy" experiment increasing "abnormally" the nozzle hole size on a common printer, JFYI: http://www.tridimake.com/2013/07/extremely-fat-extrusion-with-1-mm-nozzle.html http://www.tridimake.com/2013/07/extremely-fat-extrusion-wit... of course having both speed and precision would be much better.
  - TaylorAlexander 9y ago
    I’ve been printing with a 1.2mm nozzle on my printer for about a year now. I love it. The fat traces are strong as hell and I can print at 0.8mm layer height. However I have to print at 10mm/s and I actually use 0.4mm layers so I’m not sure it’s faster in my case. I’m still limited by my ability to melt plastic. But I’m building a robot [1] that is 200 hours of print time currently, and I’d love to make it faster. [1] http://reboot.love/t/rover-a-robot-you-can-make-at-home/94 http://reboot.love/t/rover-a-robot-you-can-make-at-home/94
    - Ccecil 9y ago
      Yeah...overall your hotend is still limited volumetrically...so overall for volume extruded you are still printing at the same rate. I feel big nozzles printing wide traces have other benefits like overall strength and such (less welds is my guess) and thicker walls per number of perimeters (again...less welds). In my shop I keep a .7mm authentic jhead for when I want to use a larger nozzle.

jaclaz 9y ago

>I wonder if you could have a something that squirts a fine jet of liquid nitrogen, just behind the print head? Expensive though I suppose. Maybe - just a semi-random idea, mind you - a Ranque-Hirsch (or Vortex) tube (and a source of compressed air) would be enough and possiby be more practical: https://en.wikipedia.org/wiki/Vortex_tube https://en.wikipedia.org/wiki/Vortex_tube

louithethrid 9y ago
Add Peletier elements to that, cooling the air to cool, heating the filament to print.

lbotos 9y ago

Also though depends on the need right? If I'm making a 3-d print of something that I just want to see a very rough mockup in space, I might trade accuracy for speed if it goes from an hour to < 10 min.

jaclaz 9y ago
>Also though depends on the need right? If I'm making a 3-d print of something that I just want to see a very rough mockup in space, I might trade accuracy for speed if it goes from an hour to < 10 min. Yep, coincidentally I was just reading today about a "crazy" experiment increasing "abnormally" the nozzle hole size on a common printer, JFYI: http://www.tridimake.com/2013/07/extremely-fat-extrusion-with-1-mm-nozzle.html http://www.tridimake.com/2013/07/extremely-fat-extrusion-wit... of course having both speed and precision would be much better.
- TaylorAlexander 9y ago
  I’ve been printing with a 1.2mm nozzle on my printer for about a year now. I love it. The fat traces are strong as hell and I can print at 0.8mm layer height. However I have to print at 10mm/s and I actually use 0.4mm layers so I’m not sure it’s faster in my case. I’m still limited by my ability to melt plastic. But I’m building a robot [1] that is 200 hours of print time currently, and I’d love to make it faster. [1] http://reboot.love/t/rover-a-robot-you-can-make-at-home/94 http://reboot.love/t/rover-a-robot-you-can-make-at-home/94
  - Ccecil 9y ago
    Yeah...overall your hotend is still limited volumetrically...so overall for volume extruded you are still printing at the same rate. I feel big nozzles printing wide traces have other benefits like overall strength and such (less welds is my guess) and thicker walls per number of perimeters (again...less welds). In my shop I keep a .7mm authentic jhead for when I want to use a larger nozzle.