ABS warping and extrusion issues

[lukuky64]

Hey, thanks! I will put my filament into a container with some silica gel.

[TommyDee]

I'm not sure what you mean?

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... the image is the message that the link takes me to.

[lukuky64]

Sorry there must have been an issue, maybe the file was too large. Here's a link: https://imgur.com/v8Zqrar this should work.

[lukuky64]

I think the issue has something to do with Z wobble, how could I fix this on my Da Vinci printer?

[Roberts_Clif]

Your images display perfectly.
Here is a copy of one.

Copy.jpg

As for the lines starting up about 1/3 of the model being printed this could be a multitude of problems.
This could happen because of the lead-screws being out of alignment, it could be because the linear rods are too loose for the bearings or the bearing could need repacked.

Great Bearing Cleaning video
https://www.youtube.com/watch?v=KQHugGSQd5M

[curious aardvark]

one other reason for the lines could well be a temperature gradient in the printer itself.

The reason abs isn't well suited for 3d printing is because it has built in shrinkage - this is to allow easy removal from injection moulds - which is what it was developed for..
So as each layer cools, it shrinks, the hotter the model stays the less the individual layers shrink.
The shrinkage can causes layer lines and also is what causes the really crappy layer adhesion.

Obviously the layers nearer the printbed are being heated by the bed itself, the layers further up are warmed ONLY by the internal temperature of the printer itself. And unless you have a thermostatically controlled temperature in your print area, it's always going to be cooler the further away from the print bed you get.

I also have a shelf full of abs - at some point I'll either give it away (I have tried, nobody wanted it) or dump it.
For me it's purely down to the smell and fumes.
Even on an open frame printer, if you print slowly and hot, you can get decent prints. They will not be as strong as prints with a material that has a lower thermal expansion, but they are useable.

But I have a relatively small crowded workshop and having it stink like a chemical factory is a bad idea.

Pla either doesn't smell or smells like maple syrup :-)

[airscapes]

In defense of ABS, it works really well in an enclosure that is kept at 100F while printing and a bed at 110C. I have been using it a LOT for functional parts I design. The higher quality ABS works best, MakerGear sells a USA made rebranded product that is really excellent but $39 a roll plus shipping. The Esun stuff is ok, but not as consistent in diameter.

[lukuky64]

Last night I performed the PID autotune on the nozzle, not sure if it made any difference but I wiggled the Z bed around a bit and the layer issue has seemed to minimise a bit. But maybe it had something to do with the model. The 3DBenchy bridging section failed near the top so I increased the travel speed to 95mm/s and did a bridge model test. But I am impressed the printer is now able to create the front hull without any drooping.

https://imgur.com/a/ttRwrJF

Also, if you are giving away ABS filament... I will gladly be willing to help you out . I am located in Australia though, so i'm not sure how much shipping will cost me.

[lukuky64]

Oh I thought Esun made high quality filament, when I purchase some PLA or PLA+ I will try a different brand, Thanks!

[airscapes]

Oh I thought Esun made high quality filament, when I purchase some PLA or PLA+ I will try a different brand, Thanks!

Esun is fine, just not always as consistent in diameter. I use Esun all the time PLA + PETG and ABS.. just saying there is higher quality and it does make a difference.