overhang issues with Wanhao Duplicator 4

[krikey]

I’ve just started printing again, but have an issue with ABS print overhangs currently which im not sure how to solve. I’ve posted up a picture of my print, can anyone help?

[brettboller]

I had the same issue. I think it’s too small. When I printed a larger version it worked fine.

[aholesen]

What temps?

Try lowering your extruder temp and keeping the bed temp high. I use 110 for the bed and 225 for my Esun ABS.

[KB_Assfalg]

Hi. When printing small parts, I place two (sometimes four) of them, with space between (50-80mm).

So the printer needs time to switch between the parts. He is printing two layers and then he switches to the other part. This gives the material time to cool down.

[JLuis_Mene]

use simplify3D and then updgrade at sailfish firmware, with 218 extruder temp and 95 for bed. At 80% print speed

[krikey]

Im printing at 230 and 110 for the bed. I’ll try knocking down the speed and also the extruder temp and see if that helps. thanks so far.

[brettboller]

I never heat the bed more than 35. Prints come out fine. 220 on extruder

[will_kostelecky]

Attached are some pictures of objects from my printer. If you have not tried the calibration objects that I show you may want to try them. Here is what has worked for me:

Print at the lowest temperature that you can still extrude reliably. I am printing first layer at 225 and then decreasing to 210.

Bed temperature will not help with overhangs but does help with ABS deformation. I start at 110 and back down to 90.

Two calibration parameters are particularly important for over hangs with one being how much plastic is extruded. Extrude as little as possible to keep the bridging strands from drooping. I use 50%. The other is speed. Slow, slow, slow. Like maybe 2.5mm/sec.

Finally, some of your issue looks to be cooling. You can slow things down in general, you can print multiple parts, or you can add a fan. In my humble opinion the printer should have one installed. This is a whole 'nother topic but I would try all of the above, and slow things down, and then see how you are doing.

Will

[3DPrintedArt]

Hello, I have experienced this problem before. What is your fan speed at? If it is to low, the layers will melt together and droop. If it is to high, you will get cracks in your print. I suggest turning the fan speed to 80% This should cool the layers enough to keep them from drooping, but you won’t get cracks in your print.

cheers,

3D Printed Art

[gabriela3d]

@wes1007 do you have any tips on this? Your Marvin was certainly spectacular!