ABS Warping

[scientiffic 0]

I have a small (1" x 3/4") part that I'm printing in ABS.  You can see from the images below that there are quality issues with the ABS prints (white, on left), which were exported using the Cura "high quality" setting.  The part on the right in grey were printed in PLA several months ago.

It looks like the area around the holes are not filled properly, and the material flow is not consistent, as the surface is not smooth.

I'm using default settings for ABS (100% speed, 110C buildplate temp, 250C nozzle temp).

Any advice on how to fix this?

Edited October 21, 2015 by Guest

[ultiarjan 1,222]

For abs you need to enclose your printer to create a "heatchamber". I use a perspex plate for the front and a curver box to put on the top.

[ultiarjan 1,222]

Oh and the clips I use to put the box on the top are on youmagine.com

[scientiffic 0]

For abs you need to enclose your printer to create a "heatchamber". I use a perspex plate for the front and a curver box to put on the top.

 

Thanks, I added a cardboard lid to my ultimaker temporarily?  Is more heat lost through the top or front?

[rigs 735]

The top : thermal convection.

But the best it's also close to the front.

[scientiffic 0]

Here is the (poor) quality of the print after adding the "heatchamber" (I also added a piece of acrylic in front of the printer to prevent heat loss through the front opening).

Any other ideas of what I can change?

[rigs 735]

Your problem it's not warping...

The heatchamber it's just for interdiffusion or layer bonding and of course warping.

The part is very small, no ?

Try to print two part in the same session layer-by-layer.

Edited October 21, 2015 by Guest

[danilius 118]

Having printed several hundreds of hours worth of ABS both very small parts and pretty large (longest print was 65 hours), I think your issue is not so much the ambient temperature, since you are printing a smallish part.

First of all, all the blobbing can be down to too much or too little fan. Weird, I know, but at the moment I print ABS with the fans off. Even really small parts.

Next, the temperature does not have to be so high. Try printing at 30/mms with the temp at 220C - 230C, layer height 0.1mm.

Edited October 21, 2015 by Guest