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By: Aren Siekmeier
New: 24-05-2011 13:58
Updated: 07-07-2011 15:46
Total downloads: 266 times
CAD Model of the Fighting Calculators' 2011 Robot, the Scorpion.
Click here to download.
First, a 3D pdf that can be viewed in the latest version of Adobe Reader. This is the smallest download option. I've also uploaded the native Solidworks assembly in a .zip as well as a .STEP (AP 203). [Edit] Because of the upload issues I've been having with CD, all three of these files have been uploaded to https://netfiles.umn.edu/users/siekm...red/2011Robot/. You can still get the pdf here. [/edit]
Features a welded, 1" aluminum boxtube frame with what some have called "Slide Drive," a continuous belt driven elevator, pneumatic gripper, and minibot deployment powered by a gas shock (for initial alignment) and surgical tubing (deployment). Our Slide Drive consists of four 4" omni wheels in a standard tank drive configuration (drive as an Arcade drive) plus a 5th one mounted sideways in the middle to provide the third degree of freedom for relatively small cost in terms of forward speed, forward traction, and simplicity. Some details from the manufacturing, assembly, and iteration process not included, such as:
-Chains and sprockets in the drive train. After doing all the math and picking them out carefully, we didn't bother putting it in the CAD. It came back to haunt us later...
-The gas shock and surgical tubing for the minibot deployment. It aligned with the sprung hinge shown effortlessly and launched the minibot out there in less than .25s.
-The minibot. After an ok 3s "classic" style at North Star and a few not-so-successful attempts at direct drive (mostly due to team commitment issues) we ended up borrowing one from 931 (thanks again, by the way!).
-The racquetball we added at CMP to shock mount the strafe wheel. It was compressed between the strafe module and a static frame member to keep the strafe wheel in contact with the floor with the appropriate normal force. We thought this was a pretty cool solution using a pretty cool everyday object. Pictures hopefully available soon.
Attached Files
-
2011_FRC2175_ScorpionRev5.PDF
2011_FRC2175_ScorpionRev5.PDF
download file
uploaded: 24-05-2011 13:58
filetype: PDF
filesize: 18.07MB
downloads: 264
Discussion
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24-05-2011 14:15
Aren Siekmeier
Re: paper: FRC Team 2175's 2011 Robot CAD
Finally got this up here, with help of the 12 Mbps upload speed I found. So far it's just the 3D pdf, the STEP and zip were still too big (same problem as before). I'll keep trying.
Edit: Browsers appear not to be the issue, although trying it in Firefox and IE revealed that the upload is definitely being cut off midway... So it looks like a timeout or max upload time problem.
07-07-2011 14:39
Aren Siekmeier
Re: paper: FRC Team 2175's 2011 Robot CAD
I have never stopped having the upload issues I was having originally (even on this 28 Mbps upload network), so as I should have a long time ago, I've uploaded all three files (3d pdf, .zip, .step) to https://netfiles.umn.edu/users/siekm...red/2011Robot/. It took about 3 seconds...
12-07-2011 22:43
MattC9
Re: paper: FRC Team 2175's 2011 Robot CAD
Hey i was looking to get a closer look to the minibot, but there's 1 small problem, no minibot with the CAD files. Could you please up load it, it would be very much appreciated
12-07-2011 22:50
Aren Siekmeier
Re: paper: FRC Team 2175's 2011 Robot CAD
The minibot, unfortunately, was the part of the robot's performance that we kind of neglected this year. As such, the one we competed with at North Star was a kind of crappy, quickly thrown together slow thing that worked, but nothing more. And we never CADed it, which was both the cause and the result of its shoddiness. For the Championship, we worked at a faster, sleeker one (that needless to say, would have been CADed), but we ended up borrowing one from 931. Being totally honest, this was a huge disappointment for me this season, seeing the potential for building our own minibot that would have been a champ (cuz after all, it was extremely easy) even before our rather late week 5 regional, but then not having enough commitment from the team after the robot shipped to get anything done.
In short, no CAD file. Sorry. If you can track down a CAD of 931's minibot(s), that's what you're looking for.
13-07-2011 00:43
MattC9
Re: paper: FRC Team 2175's 2011 Robot CAD
Ahhhh ok, soundS like my team right now, trying to get a minibot done. But thanks for the info.
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