Ideas for 3D Printing Competition

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Ideas for 3D Printing Competition

Postby wd5gnr » 2015-Feb-Mon-13-Feb

The company I work for has bought a few printers and has been imposing on me as the local "expert". They want to have a "competition" for engineering week next week. The challenge is, we have a lot of engineers some of who are experienced CAD designers and many who are not. We only have 2 printers (and may only have 1). And they want to get done in a week.

So I think anything open ended is going to be a problem.

My thoughts for now are this:

Design some sort of pedestal that could hold weights. Have two categories of competition: use our model or make your own. If you make your own, it has to fit in the same space as the provided model. Then we judge on weight holding capability along with print time. So if your print takes less than 30 minutes you get to claim 2x your actual weight you can hold before collapse. If your print takes less than 90 minutes you can claim 1.5X. Otherwise, 1X. Maybe even say if it takes more than 2.5 hours you get 0.75X your weight?

Highest weight held in each class wins.

A variation would be see who could hold more weight before the layers delaminate. That might be easier because I expect it would be less weight.

I'm open to other ideas or improvements. Might have to limit infill because I imagine a solid block of PLA would hold a lot of weight. Or maybe make it such that you have to be on no more than 4 pillars each no thicker than 5mm or something like that.

Any ideas?
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Ideas for 3D Printing Competition

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Re: Ideas for 3D Printing Competition

Postby RetireeJay » 2015-Feb-Mon-13-Feb

A bridge that would hold weight in the middle would be a lot more of an engineering challenge than a pedestal. It could be printed "on its side" so that the geometry could be optimized. In order to better equalize the challenge, how about asking for the design which holds the most weight for the least material used? I know Repetier tells you how many mm of filament will be used in a print. That way, the speed of the printer becomes less important (Plexus' souped-up plus is going to outrun any Simple in a straight speed trial). Does your company have an Instron or equivalent to accurately test the weight-bearing capability?
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Re: Ideas for 3D Printing Competition

Postby wd5gnr » 2015-Feb-Mon-14-Feb

I have no doubt we have an Instron (I work for a Very Big Company you've probably heard of). Now how much paperwork it would be to get use of it is another issue (I work for a Very Big Company) ;-)

Yah a bridge is probably a better idea. I'm an electron pusher so that's the kind of ideas I'm looking for!
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Re: Ideas for 3D Printing Competition

Postby frankv » 2015-Feb-Mon-22-Feb

Might be easier to make the weight of the bridge part of the win formula rather than trying to record the mm of filament.

So "weight held"/("bridge weight" * "printing time") might be a good formula.

This encourages people to minimise weight = less PLA used => faster printing.

Are you going to allow a bridge to be assembled from multiple parts? Or does it have to be printed in one piece? How big is your printer?

Or how about this...
Bridge to span a 95mm gap with 2.5mm at either end, must weigh less than (say) 6g (at 1.2g/cc, this would allow a rectangle of 100x10x5mm), be printed in one piece, and support coins. Each person wins all the coins their bridge can hold up. Competitors put coins on the bridge until a coin falls. Adjust the bridge max weight depending on how much material you want people to print, and how much prize money you can give away. Coins could be pennies, quarters, or gold sovereigns. :)

Pre-heat the coins on your competitors' bridges :twisted:
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Re: Ideas for 3D Printing Competition

Postby frankv » 2015-Feb-Tue-12-Feb

Some more ideas...
Boats to hold coins.
I think the 100mm bridge might be too easy... so make it (say) a 200mm gap, made out of two parts that clip together.
A coin-launching device to throw a coin as far as possible... this would probably be a ramp.
Maybe something useful that people could use in the office... a phone headset, office tidy, coffee cup holder, pocket protector? Not sure how you would judge the winner though.
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Re: Ideas for 3D Printing Competition

Postby ThereWillBprints2 » 2015-Apr-Mon-00-Apr

backsplashes that can be put up in minutes as opposed to days. I have models
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