I've noticed i've been getting a lot of "ringing" near sharp edges recently.
I guess it's finally time to switch from MXL to GT2 belts.
You can notice a gap in the layers in the lions right side. That's filament's fault. It did that about 3-4 times now, and i've narrowed it down to either bubbles in the filament or trapped moisture. I've actually stopped a print once in the middle of a botched perimeter and dug out the remains of the filament from the nozzle. There was a bubble in there, but, like i've said, i wasn't sure if it's a manufacturing defect or a steam bubble.
Anyways, been using Arcol.hu 4 for a little over a year now and don't plan on stopping any time soon :)
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On Friday, 24. May 2013. at 10:47, Laszlo KREKACS wrote:
I'm not that sure GT2 is the only cure for cancer:)Read here more: http://wiki.arcol.hu/blog:arcol-t25
I think it is time for a new monthly (june) competition.I can offer a full pulley+ belt set as a first prize (for a machine).Thats about 3meter of belt or so.Best,Laszlo
On Monday, 27. May 2013. at 18:53, Matej Rozman wrote:
Yes, all of that was covered before.Acceleration (and jerk - because jerk in Marlin and Repetier aren't true jerk, but just a speed limit below which there is no firmware-based acceleration, only the acceleration caused by the stepper's torque and stiction) affect the rippling and reduce it.But that proves nor solves anything :)It's akin to me saying "my car shakes rather violently if i go above 60 km/h, any ideas on how to dampen that" and you replying with "then don't go above 60 km/h" :)
And yes, it's a mechanical issue. Cartesian bots have lots of degrees of freedom and oscillation modes. Nothing new there.And yes, the Arcol.hu, being a mass suspended on a thin SS tube is rather prone to oscillating. But those are all symptoms and contributing factors, not causes.
Regarding belts - that's been covered before (plus, the table and the carriage are about the same weight, or the table is a bit heavier. But Y is currently exhibiting less rippling than X. Stiffer belts might help somewhat, tho, as they'd "eat up" some of the vibrations, or they might change the k spring constant and raise the rippling frequency (which is also a solution, if raised high enough).