Thought I was a 3D printing hero until I tried ABS :(

[loiphin]

So I have had my M2 for a couple of weeks and been printing great quality pieces in PLA. And then I tried ABS I would like to print a new extruder with a tighter throat ( http://www.thingiverse.com/thing:717414 ) for some TPE printing later on.

So I printed it in ABS as per instructions on the site, with ABS at 235 degrees and bed at 110 degrees using Simplify3D high quality setting (with infill bumped up to 80%).

And it came out like crap My guess is bed is way too hot , by looking at it. The top of the part in the picture was resting on the glass plate (with hairspray).

Any tips welcomed

loiphin

http://i.imgur.com/e0s2gmB.jpg

[loiphin]

UPDATE:

Doing another print, and the main culprit is definitely the 80% infill. Running it at 30% with High Quality settings in S3D and it's looking very tidy so far. Reduced the bed temperature to 90 degrees as well, but not required for this issue. Will update when fully printed.

UPDATE2:

http://i.imgur.com/M6uyz9c.jpg

Printing is great and all is good in the world


UPDATE 3:

I think I was hiding the actual problem when I did this print originally. It looked like crap with a high infill, but that was because of over extrusion. So when I reduced the infill, it helped but the root cause is over extrusion. After printing a bunch of 20mm test cubes I found that my extrusion multiplier should have been set to 0.95 ,and it was defaulting in S3D (for M2's printing ABS) to 1.1!!! So thats quite a difference.

[Tim]

You can still be a PETg printing hero. . .

[PcS]

Let us know how.it.turns out.

[jimc]

i generally print abs with a bed temp at 90 deg. i have found that when you get up in the 100-110 deg range when using hairspray and abs, the spray gets too soft and the abs will pull up off it. abs has alot of pulling force. i always print my filament drives at 80-90% and your right it can be tough. at 90deg i can get an ever so slight curl at the corners. at 100-110 it would warp bad.

[loiphin]

Hi all,

Print turned out beautifully. http://i.imgur.com/M6uyz9c.jpg I forgot to mention I also played with the support settings a bit as the supports seemed a bit too aggressive and really stuck to the original print.

The question is how long will it last as a filament drive in my M2, when its printed with a 30% infill? Not sure I could ever do a 80-90% infill as it turns to mush??

[jimc]

I think the stock one is around 25-30%. If you print one at 80-90 it shouldnt get heat soaked like pla would. Each layer should have enough cooling time. All you need is about 20-25% support density.

[Jules]

Hi all,

Print turned out beautifully. http://i.imgur.com/M6uyz9c.jpg I forgot to mention I also played with the support settings a bit as the supports seemed a bit too aggressive and really stuck to the original print.

The question is how long will it last as a filament drive in my M2, when its printed with a 30% infill? Not sure I could ever do a 80-90% infill as it turns to mush??

That is beautiful, and thanks for posting that link - I'm going to try one of those in PETG cause I've got a roll of flexible stuff coming.
(Heck, one of these days i might even get around trying to print that spool of ABS that i got at the start.)

[insta]

dammit jules put the abs goop on some kapton and print with that spool of ABS

[Jules]

dammit jules put the abs goop on some kapton and print with that spool of ABS

But i hate starting over again, knowing nothing, the struggle, having to adjust it for Zebra printing since i am NOT going to reset that stinking Z-stop again, making thousands of post-its worth of notes again.....

(want a little whine with that dinner.....? )

Geez, just figuring out PETG here.......let me enjoy actually feeling comfortable for at least a minute or two!

Before i tackle ABS - I was thinking of rigging a second Zebra plate with a Kapton cover, so i can use the juice to stick it at the lower Zebra temps. I'm hoping (and it might be crazy wishful thinking) that there might be less warping/splitting if we can print the ABS at a slightly lower temp, so that there is less temperature differential as it cools. It might work for very small prints, but it sounds like ABS needs the strength of a metal plate to keep from warping up, if you print bigger items.

It's worth experimenting with, but i need more time....there's never enough time to do everything i want to try.