Hi, The extruded PLA from the nozzle is a bit rough. i.e. when i slip it between by two fingers, I can feel the surface is not smooth. What could be the possilbe cause - heat or extrusion speed. From my past reading faster extrusion leads to curling. So is it because the heat being low or high. PLA - 3mm Nozzle witdth - 0.35mm Extrusion spped 400 Heat 200 Thanks https://reprap.org/forum/read.php?1,168558,168558#msg-168558 Mon, 07 Sep 2026 02:24:49 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,168558,168657#msg-168657 https://reprap.org/forum/read.php?1,168558,168657#msg-168657 -------------------------------------------------------
> Agree with the above poster.
> All I can add is that cheap filament has shard of
> old used junk added to it. You can tell when you
> compare white vs. black. They hide stuff in the
> black apparently. Once a plastic is molten, it
> can not be re-molten properly if it is aged. So
> that begs the question, what is your polymer
> source?
>
> With white pla I have succeeded at 180C. With
> black nowadays I'm up to 210.

You can find ball bearings and all sorts of crap in cheap plastic, but you surely are not suggesting its intentional?
It's accidental and allowed to happen due to poor QC.]]> yydoctt General Wed, 28 Nov 2012 08:33:40 -0500 https://reprap.org/forum/read.php?1,168558,168592#msg-168592 https://reprap.org/forum/read.php?1,168558,168592#msg-168592 All I can add is that cheap filament has shard of old used junk added to it. You can tell when you compare white vs. black. They hide stuff in the black apparently. Once a plastic is molten, it can not be re-molten properly if it is aged. So that begs the question, what is your polymer source?

With white pla I have succeeded at 180C. With black nowadays I'm up to 210.]]> Simba General Tue, 27 Nov 2012 23:19:10 -0500 https://reprap.org/forum/read.php?1,168558,168584#msg-168584 https://reprap.org/forum/read.php?1,168558,168584#msg-168584 Some filaments do that when the temperature is too low (or too low for a particular extrusion speed).

Not all of them, though (transparent ones almost never exhibit this).]]> orcinus General Tue, 27 Nov 2012 22:16:56 -0500 https://reprap.org/forum/read.php?1,168558,168571#msg-168571 https://reprap.org/forum/read.php?1,168558,168571#msg-168571 -------------------------------------------------------
> how are you reliably getting 400mm/minute., it
> just seems incorrect. something like 40 is more
> tipical of 0.35mm nozzles. we are talking about
> 3mm feedstock end speed not filiment speed
> correct?
>
> also post a picture or video, it helps a lot

@james Yes it is 3mm filament. The speed that I am referring to is Extruder speed. Not sure what are feedstock end spped or filament speed. By changing the extruder speed (I am using RepSnapper - attached is the picture) it is changing the rate at which the filament is pushed so I am assuming that is filament speed]]> 3eality General Tue, 27 Nov 2012 21:08:47 -0500 https://reprap.org/forum/read.php?1,168558,168569#msg-168569 https://reprap.org/forum/read.php?1,168558,168569#msg-168569
also post a picture or video, it helps a lot]]> jamesdanielv General Tue, 27 Nov 2012 20:35:42 -0500 https://reprap.org/forum/read.php?1,168558,168558#msg-168558 https://reprap.org/forum/read.php?1,168558,168558#msg-168558
The extruded PLA from the nozzle is a bit rough. i.e. when i slip it between by two fingers, I can feel the surface is not smooth. What could be the possilbe cause - heat or extrusion speed. From my past reading faster extrusion leads to curling. So is it because the heat being low or high.

PLA - 3mm
Nozzle witdth - 0.35mm
Extrusion spped 400
Heat 200

Thanks]]> 3eality General Tue, 27 Nov 2012 19:04:30 -0500