New to printing ABS with initial bad surface finish

Filament
1

Hi Folks,

I’m new to using ABS previously only using PLA in my prints. My dilemma is the the initial layers have a really bad surface finish then improving further up the print. I have a taz 5 and used the presetting of 240 hot end and 110 for the bed with 40% fan speed,100% flow, 100% fill, running at 1000mm/s, I’m thinking i might benefit from turning the fan right down / off?

Thanks in advance

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IMG_1851.JPG2448×3264 1.04 MB

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IMG_1850.JPG2448×3264 1.11 MB

2

Maybe the upper layers have a better surface due to slower speed (minimum layer time).

3

No fan at all for abs unless printing extremely small things or bridging. You also might be overextruding . check the filament diameter and adjust accordingly. Also turn the infil down a bit if you are trying to print near 100%

4

This looks like extreme overextrusion and maybe too high of temperature. On my mini I have to print at like 80% extrusion.