Issues Printing Lower Half of Sphere

The distorted portion was the bottom of the print (printed first). This was printed at 0.3 mm with raft and full support. Any suggestions to get this spherical print looking fully spherical?

If you can print a perfect sphere you could pass along your settings too...just as helpful..

Thanks a bunch!!

 

What temperature is your HBP? I find over 40C I get layer distrotion real bad. The cooler the bed the better IMO

 

This was the first print I did using ABS, so I just went with the startup guide's recommendation of 100C. Seemed excessively high to me.

Looking back on this, I realized the support structure didn't cover some of the 100% of the lower part of the sphere. I think I'm going to redo the print with a smaller support activation angle

 

Oh that's ABS didn't realize, always include that in OP's.

Only way to fix that with ABS is to enclose the printer, preferably with heat

 

Or split the model, print in two halves, and fuse. That's what I do for spheres in PLA that end up looking a lot like that on the bottom, and it works beautifully.

 

good advice, what method do you use to fuse the two halves? I might try a ABS/Acetone slurry first

 

I've only printed in PLA and used cyanoacrylate (super glue) which works beautifully on the flat pieces printed against the base. Clamped the two halves tightly together for at least an hour and they are stuck HARD.

Heard good things about acetone as a glue for ABS though so worth printing a couple little tiny pieces in your current filament, and testing to see how well it works.

 

ABS/acetone slurry works great imo

 

Mike, any recommendations on ABS to Acetone ratios?

 

I put my abs in a glass jar and compress it in as much as possible. I then fill the jar with enough acetone to cover all the abs. Too much abs and you're left with a sort of pasty slurry. Too little and it's runny. You can adjust the ratio after the fact by adding more abs/acetone depending on what you're looking for. That said I find the method I use has good results.