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The Dual Rook - 3D printer Benchmark

by BCN3D Nov 15, 2017
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These are insanely fun, I play chess with them all the time.

Mine printed perfectly without supports.

same, they're very easy to print

How high does the internal spiral need to be raised to match up the part?

Description says No supports
No pictures or details are shown on the overhangs in the " top of the side slit" where there's no support, no details are shown for the inside on top of the spiral where there is a round shape over the air. Sounds to me those areas do require support.

I want to print it according to suggested settings, but dont want it to be a waste of filament if it looks bad or fails on those areas.

Hello Félix, I've printed it without supports at the first attempt, look my pictures.

Hope I've helped you, and hope you can print it well as soon as possible because is a nice piece


The Dual Rook doesn't need supports. It is a benckmark that will test your abilities to tune the printing profile and will test your printer capabilities.


I understand that, but i dont think you get my observation.

No matter how good the printer is, it is physically impossible to print an ARC or curve line over open air. Simply not going to happen.
This model has 2 instances in which this will occur if no supports are used. I guess i must show you, so I have attached what i mean.
None of the pictures on the item show how this is handled without supports.

I can add supports manually, thats no problem, im just making sure its understood that without them, these two areas will look bad. thats what i was trying to avoid.

Just trying to provide some user feedback.

Hi, the file doesn’t need supports. It has been designed for being printed without any supports and to test layer fan, among other things. Those parts you show on the picture are saved easely. Not all the overhangs need supports if they are sourounded by walls. Check out this video and you will understand it: https://youtu.be/wK2APNwEoSk

Attached photo of my print.

My inquire is about the arc and curvature not being possible without support. You clearly don't get my point.

First that video you showed, its bridging. Its clearly bridging on a STRAIGHT line. So it doesn't apply to this. We talking about a bridge that makes an arc (half a circle!!!) without supports. Its just NOT possible without supports.

Second, that pic you attached, again DOESN'T show the two areas i highlighted above. So your picture doesn't answer the question still.

Simply put, i have a valid observation that hasnt been answered correctly yet.

Here you have the pictures :) it is difficult to shot the internal part, hope this can help you. You say that is not possible to print it without supports but everyone is printing it without it. And BCN3D team also print it without it. Why you just try to print it :)?

i went ahead and printed it to show what i meant. the curve bridging wont work as people might expect. im just saying