Check it out!
I printed the good one at 225C, 255 extruder speed, rotated so it’s correct (on it’s back).
The YouTube compression doesn’t quite do the piece justice, so here are some pics.
First, here are some early attempts:
Upper left is ABS printed vertically, upper right is ABS printed flat on its side, lower left is the my first PLA attempt (235C, 210extrspeed), lower right is my second PLA attempt (240C, 255extrspeed)
Then I lowered the temperature to 225C, and kept extrspeed at 255:
225C, 255 extrspeed. Looks good, but inside of recessed area is a bit rough.
Then I printed one more, this time rotated on its side, at 225C with an extrusion speed of 255 (edited the gcode file by hand). This final piece can be seen on the right in this next pic of all of the PLA attempts so far:
4 PLA attempts. The one on the far right is the excellent one.
Again, the one on the right is the best one. Printed on its side, 225C, 255 extrspeed.
Here are a few more pics of the beautiful piece. It feels like either something you’d expect from a super expensive 3D printer, or something you’d expect from outer space. Superman’s fortress of solitude comes to mind:
One last comparison shot – the piece on top in this next picture is the 225C printed vertically, and the piece below is the 225C rotated to print horizontally.
Looking around my work bench, not including any of the items in these pics, I count at least five other attempts that failed in ABS because of warping. PLA worked great, with no heated bed, and no raft. I did run into some problems where the extruder stopped printing because of some internal jam or backing up (guess), but I was able to fix that by setting the temp to 240 and extruding for a while.
Moving on to other pieces now.
Good work. I was thinking PLA printed at much lower temperatures. I print ABS at 220C…
I’ve heard that too. When I tried much lower temperatures it sometimes failed to come out of the extruder. I was going to try 205C but the motor sounded strained trying to even print. Sometimes my extruder jams and I can’t extrude at all, and I need to raise it to like 240 and extrude for a while, to clear it out (I’m thinking plastic backed up into the barrel and at 240 there’s enough heat to melt some of the plastic higher up in the barrel? I don’t know.). Then there’s the question of whether that’s actually 225C, or if the thermistor is off. For reference, I print ABS at 220 also, but never did real serious temperature comparisons and graphed them out or anything).
So apparently there are multiple types of PLA out there, with different properties and temperature. So far I’ve been using the ultimachine.com PLA based on NatureWorks PLA 4042D, and now i have on order some makerbot.com PLA based on NatureWorks PLA 4032D with different temperatures.
Re: Melting point?
Posted by: nophead ()
Date: December 19, 2009 01:53AM
ABS softens at 90C, melts at 105C, can be extruded at ~180C but needs to be ~240C to bond strongly to itself.
HDPE melts at 130C, extrudes at similar temps to ABS.
PLA softens ~50C, melts at ~ 160C, extrudes and bonds well at 180C-190C.
[www.hydraraptor.blogspot.com]
YES YES YES YES YES!
I got $500 dollars! Buy, Sell, TRADE!! How to get someone to print the parts for me?
Its intereseting in your pictures the various shades of colour the printed parts have.
Do you know why this is? (temprature?)
The one with the pink hue is the most noticable in the pictures ~ the finish on the last clear one looks very sharp and crisp.
Excelent post.. reading the rest of your blog now
So that picture on the half-wall (“4 PLA attempts”) does look a bit pink (I now see what you meant), but the piece itself doesn’t at all in real life, so that is some strange lighting effect (I’m wondering if I was wearing a red shirt that day which reflected in the piece somehow?). The rightmost piece in that picture (the clear one) is the piece featured in most of the pictures after that. The picture on jeans at the end shows the difference between a piece printed vertically (the top one) and printed on its side (the bottom one), the former probably allowing more light through as it’s less dense. In that “4 PLA attempts” picture before, the piece to the left of those two was burned because I printed it way too hot.
And thanks!
If anyone needs the money I have money for printed Mendel parts and I may be reached here, mb.thewellbeinghalo.com
I could also trade for parts if anyone needs my skills.
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