Defensive Spikes Bracelet

by nac007, published

Defensive Spikes Bracelet by nac007 Feb 23, 2013
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Spikey Bracelet made of 45 degree overhang tubes. Also, attempting to make a realistic render of 3d printed material.

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Netfabb says 79.27mm outer diameter.
Estimated inner diameter (using calipers on screen to determine relative size ratio) 60.75mm.

Made one on Ultimaker i pearl-white PLA. Printed at 0.06 layer thickness and 100 mm/s. Took 7h to print. My first attempt was just printing the spikeyWithBottomSupportLayer.stl but that came loose after about 5mm height. Then printed with a brim and that stuck nicely to the bed but was a bit tedious to remove. Also broke 3-4 spikes in process.

I'm printing this now. First two attempts failed due to sub-mm dots not holding well enough to the bed at the beginning of the print. Trying it with a raft now: http://www.ustream.tv/channel/macegrhttp://www.ustream.tv/channel/...

nac007 - in reply to

Sorry to hear it is being difficult to print. I don't have a 3d printer to test with, so I'm still learning how to make models that print well. Though, if I did have one, I'd probably spends hours just watching it go. Your video stream is mesmerizing!

If you put some thin webs between the lowest points, it would provide enough support to keep them from breaking loose. The webs could be trimmed away later. Doesn't need much more...it got 4 or 5 mm up before any broke loose on my first two tries.

cquinn - in reply to

You could also turn on brims in your slicer that would do the same thing at slice-time. Slic3r can do that.

nac007 - in reply to

Thanks for the advice! I've uploaded a version with a 0.4 mm wide by 0.2 mm tall web around the bottom.

Pretty cool rendering, what software and types of shaders did you use to make it?

nac007 - in reply to bvac

Thanks, I modeled it in Solidworks and rendered using Photoview 360 (renderer built into Solidworks).