It seems to me that the slowest part of each layer is the filling in of the part known to be solid. I remember reading on the blog about an idea where the model was honeycombed into cubes or pyramids internally, so that it would take less fill per layer, and thus less time. Are there any other possible ways to either reduce the amount of infill, or change the way its done? I was wondering if maybe the outline of the layer could be printed in the normal fashion, and then filled in by pouring in a liquid to a specified depth. I don't know of any materials that would be a good choice, but it seems that using a liquid fill method could be much faster than laying single mm wide traces across the relatively large surface. Alternately, could an extruder head be made that outputs in a wide slot? I have been wondering what the effects of changing the size of the extruder nozzle are on the layer thickness, if any. Do larger holes produce thicker layers? If not, then I suppose just a coarser nozzle could be used, but otherwise a slot nozzle or other method would be better. Any ideas on reducing fill time? -Samuel https://reprap.org/forum/read.php?14,4634,4634#msg-4634 Tue, 08 Sep 2026 20:13:18 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?14,4634,5025#msg-5025 https://reprap.org/forum/read.php?14,4634,5025#msg-5025
If you fill your object with a lattice, you always get a weakness diagonal to it, which you have to compensate with a lot of material. If you need the thing to be heavy for other reasons, you]]> Karl Mechanics Sat, 15 Sep 2007 19:09:16 -0400 https://reprap.org/forum/read.php?14,4634,4641#msg-4641 https://reprap.org/forum/read.php?14,4634,4641#msg-4641 ZachHoeken Mechanics Tue, 28 Aug 2007 23:43:43 -0400 https://reprap.org/forum/read.php?14,4634,4640#msg-4640 https://reprap.org/forum/read.php?14,4634,4640#msg-4640 www.3dreplicators.com]

You don't need solid objects. You get beaucoup structural strength using HDPE with 33-50% infill. :)-D]]> Forrest Higgs Mechanics Tue, 28 Aug 2007 22:44:12 -0400 https://reprap.org/forum/read.php?14,4634,4638#msg-4638 https://reprap.org/forum/read.php?14,4634,4638#msg-4638 Kyle Corbitt Mechanics Tue, 28 Aug 2007 22:08:19 -0400 https://reprap.org/forum/read.php?14,4634,4637#msg-4637 https://reprap.org/forum/read.php?14,4634,4637#msg-4637
it would be cool to do an infill method where you print the outline / shell, then print a very sparse infill... enough for structural integrity, etc. then, when the model is finished, you fill/inject it with some sort of epoxy or resin that would settle in and harden.

if you work it right, the finished object might even be stronger than just raw plastic. the plastic might even act like a sort of rebar for the object. now wouldnt that be cool??]]> ZachHoeken Mechanics Tue, 28 Aug 2007 22:04:54 -0400 https://reprap.org/forum/read.php?14,4634,4635#msg-4635 https://reprap.org/forum/read.php?14,4634,4635#msg-4635
I like the liquid fill idea, but like you I have no idea what sort of liquid one would use (Fernando or ohiomike, any ideas?) Thermoplasts themselves don't really behave like liquids unless you get them unmanageably hot.

There hasn't been too much hard experimentation done as of yet with the effects of different extrusion parameters, this is currently an area of active inquiry. There may be a few posts in the builder's blog scattered around, and nophead has some interesting information a page back on his blog at [hydraraptor.blogspot.com]. Check it out.]]> Kyle Corbitt Mechanics Tue, 28 Aug 2007 21:56:10 -0400 https://reprap.org/forum/read.php?14,4634,4634#msg-4634 https://reprap.org/forum/read.php?14,4634,4634#msg-4634
Are there any other possible ways to either reduce the amount of infill, or change the way its done?

I was wondering if maybe the outline of the layer could be printed in the normal fashion, and then filled in by pouring in a liquid to a specified depth. I don't know of any materials that would be a good choice, but it seems that using a liquid fill method could be much faster than laying single mm wide traces across the relatively large surface. Alternately, could an extruder head be made that outputs in a wide slot? I have been wondering what the effects of changing the size of the extruder nozzle are on the layer thickness, if any. Do larger holes produce thicker layers? If not, then I suppose just a coarser nozzle could be used, but otherwise a slot nozzle or other method would be better.

Any ideas on reducing fill time?

-Samuel]]> Samuel Mechanics Tue, 28 Aug 2007 20:55:27 -0400