hmm, that's interesting, didn't think of the printbed being the issue. I'll see if I have something around the house to weigh it down or something..
For #3, I'm printing at 220. I know it's a bit high for PLA, so maybe that's an issue. But the ringing seems to inherit the shape of the heart in the first picture, which suggests that it's not a heat thing?
I noticed in your 2nd post, first picture in the thread that you linked, that you printed the ultimaker robot with 70mm/sec infill, and 20mm/sec on the perimeter. Is that possible in Cura? that would probably solve a lot of my surface issues, but I haven't found anything that can seperate the print speed from infil to perimeter.
Thanks!
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gr5 2,071
I don't mind ringing so I haven't tried to fix it but I've seen many other posts about it. Here are some thoughts:
1) someone claims it's mostly from the print bed and not the print head. He fixed it by adding an iron bar as a weight to the front end of the bed. This doesn't dampen the ringing but it changes the frequency to such a low amount that you no longer see it.
2) Jerk is the only setting that counts but the "jerk" setting that is in the marlin firmware isn't really jerk. So the only thing you can do is lower the acceleration. Try lowering it by at least a factor of 10. There's no reason not to keep the speed high although for short runs it will never be able to accelerate up to full speed.
3) It might not be just ringing - there are temperature affects that causes something that looks similar to ringing. Ringing fades as you move farther, ripple effect doesn't and is a periodic frequency caused inside the nozzle. Try lowing the temperature - look at this picture for more details (second picture in this post):
http://umforum.ultimaker.com/index.php?/topic/1872-some-calibration-photographs/
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