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Unread 21-03-2013, 12:57
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Question 3D Print scale models

Hi folks,

An open question to see if teams generated any scale prints of their robots or subsystems, and if that helped in correcting problems?

So far I'm not finding many recent posts on the topic, but we saw some nice examples at the Autodesk Oregon Regional the other week.

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Unread 21-03-2013, 16:22
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Re: 3D Print scale models

I know that my old team (2374) printed a model of our chassis in 2012, and I'm pretty sure that the model was brought to the Portland regional this year. That print was merely part of a display that demonstrated the capabilities of 3D printing to other teams. I actually had to make major changes to the model just to give it a chance of printing successfully.

I don't think that making a 3D print of a robot or subassembly would really be a useful tool. I don't see how it would communicate any information that you couldn't get from just looking at a CAD model on a screen.

However, as teams that have access to 3D printers have been learning, they can make some pretty cool parts. If you have access to one, I'd suggest experimenting with it to find applications. For example, my old team used ours to make hubs, sensor brackets, and other similar parts.
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Unread 21-03-2013, 16:38
Andrew Schreiber Andrew Schreiber is offline
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Re: 3D Print scale models

Quote:
Originally Posted by IanW View Post
I don't think that making a 3D print of a robot or subassembly would really be a useful tool. I don't see how it would communicate any information that you couldn't get from just looking at a CAD model on a screen.
From an engineering standpoint you are correct. From a human feel perspective you are absolutely wrong. Feeling the physical shape of something is a powerful trigger for memory and being able to physically work a linkage can help drastically with understanding.
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Unread 21-03-2013, 16:55
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Re: 3D Print scale models

Team 2468 got a Makerbot Replicator 2 in during build week 4. We ended up using it lots to prototype an indexer system for frisbees only to be scratched.

In the end, we have about 15 parts on our robot that were 3D printed from radio mount, feeder mounts, Jag Mount for 2 Jags, gyro mount, string potentiometer ( all parts printed on the 3D printer except the pot, string and spring) and some bling.

We are also using it for our Swag this year: 3D keychains and alliance partner coins.

Our FTC teams have been going to town using it to print our buckets and claws for manipulating the rings.

I think we have 250 hours of print time on it since we pulled it of the box (six weeks ago and one of those was Spring Break).

It has been great to do some printing to look at designs.

We are looking at getting one that prints 24" x 24" x 24" in fact.
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Unread 21-03-2013, 20:45
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Re: 3D Print scale models

I printed two 1/8 scale models and a scale pyramid the first model could drive and the second is close to our climber. Both worked. I also printed a few scale frisbees. The printed models really helped our team think about the problem. We also build a 1/12 full field every year for strategy discussion.

It made me want to start a 1/6 scale first competition.
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Unread 22-03-2013, 00:35
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Re: 3D Print scale models

Why print scale models? Just print your parts.
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Unread 22-03-2013, 01:13
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Re: 3D Print scale models

Any photos by chance? It would be interesting to see them.

Where I'm headed with the discussion is the notion of getting basic system designs vetted out early. As the time and cost get smaller for something that fits in your hand, the more it may make sense to take a near-schematic level design and print it out.

Eager to hear everyone's thoughts, and other means that printing has helped them out in the season.
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Last edited by pmax : 22-03-2013 at 01:18.
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Unread 22-03-2013, 01:32
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Re: 3D Print scale models

Quote:
Originally Posted by pmax View Post
Any photos by chance? It would be interesting to see them.

Where I'm headed with the discussion is the notion of getting basic system designs vetted out early. As the time and cost get smaller for something that fits in your hand, the more it may make sense to take a near-schematic level design and print it out.

Eager to hear everyone's thoughts, and other means that printing has helped them out in the season.
http://www.chiefdelphi.com/forums/sh...d.php?t=106849

We discussed our uses of 3D printed components fairly extensively in this thread. We tried out our first 3D printed wheels on our 2010 robot, and have used them exclusively for every season since.
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Unread 22-03-2013, 12:25
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Re: 3D Print scale models

We also printed our wheels this year for the first time and loved them.
http://i2.wp.com/www.fightingcalcula...size=625%2C416
http://www.chiefdelphi.com/media/photos/38489
http://i0.wp.com/www.fightingcalcula...size=300%2C200
we have also been printing various spacers and other small pieces for the robot for three years. So far we havent had any problems with the wheels through on competition. I can't speak for the rest of my team but i hope we continue to use them in future years
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Unread 22-03-2013, 18:30
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Re: 3D Print scale models

Team 2502 (Talon Robotics) has printed a couple parts in the past as well as a scale model of their logomotion robot.

Team Neutrino (3928) has used 3D printing quite extensively, this year we have printed:

Scale versions of frame with bumpers to discuss climbing techniques
Encoder Mounts
Versaplanetary mount and shaft cover to hold sprocket on
Battery pull tabs
A part attached to a pneumatic cylinder to push discs into the wheels
Prototype latches for our climber to test the design
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Unread 27-03-2013, 15:58
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Re: 3D Print scale models

Our team has a printer that we've begun to rely on quite a bit recently, as it can print out 1:1 scale templates of our parts (up to ~20 cm). Our bot last year actually had #C printed parts on the competition bot!
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