02-12-2016 20:24

ctt956

Re: pic: ???

????

You dropped a modified punch on a table, and it stuck into the wood like an arrow? That's what it looks like to me...

02-12-2016 20:31

BigBen

Re: pic: ???

Based on the size of the rivets in the picture, my guess would be a shaft from an installed rivet, probably much higher up, with a very lucky drop......

02-12-2016 20:34

SerpentEagle

Re: pic: ???

holo

02-12-2016 21:47

ElliottB

Re: pic: ???

Looks like the shaft off a rivet considering the size of the rivet and how the end is cut.

02-12-2016 23:52

PAR_WIG1350

Re: pic: ???

It's an octagonal frame and belly pan, standing on its side. Given the lack of wheel cutouts along the edge closest to the table, and various holes placed elsewhere, it is uses four omni wheel, one at each corner short edge. The rivet mandrel stabbed into the table is just a distraction.

03-12-2016 01:08

Cothron Theiss

Re: pic: ???

Swerve is also a possibility. The swerve modules might attach at the mounting holes in the bellypan. My question is, why does all your tubing and gussets look like it's been faced off on a mill or lathe?

That's a very pretty bellypan, by the way.

03-12-2016 02:36

RoboChair

Re: pic: ???

Looks like your table........





Just got shanked!

03-12-2016 02:38

RoboChair

Re: pic: ???

Also, why the heck are you facing down your square parts on the lathe in a 4-jaw chuck? How bored are your students and who taught them that was a thing in the first place?

03-12-2016 02:43

frcguy

Only you would notice that .

03-12-2016 03:06

RoboChair

Re: pic: ???

They could have at least had the decency to properly center the parts in the jaws, but no we'll put it in offset and not worry about it.



Unless..... maybe they did it in the 3 jaw?

03-12-2016 08:36

SerpentEagle

Re: pic: ???

You have some very nice guessing skills

We use circular Scotch Brite pads with a drill press to polish our metal with swirls. It's fast, cheap, and looks amazing!

And thanks!


I have absolutely clue what your talking about lol

03-12-2016 10:36

Ari423

Re: pic: ???

If you look at the far corner, there is what appears to be a bearing hole in the 45* piece. I would assume that is where an omni wheel would go for 4-wheel kiwi.

03-12-2016 16:34

Cothron Theiss

Re: pic: ???

Ahhh, ok. The circular patterns your Scotch Brite left look very similar to if you'd faced it off on a lathe, which would be an enormous waste of time. But hey, it looks awesome! I hope to see some videos of it in action when it comes to that time.

03-12-2016 16:45

Thayer McCollum

Re: pic: ???

Whoa... Not only is the rivet stem a ruse but the frame is too. If you carefully look through the holes in the belly pan then there is indisputable evidence that... it was Colonel Mustard in the dining room with the candle stick!

03-12-2016 20:13

GeeTwo

Re: pic: ???

I see what you did there...



Seriously though, it seems unusual for the extruded tubing and the plate gussets to have such similar finishes; most use 5052 for gussets. Are the gussets made of 5052 that really looks like that after treating with the scotchbrite pads, or did you use something else?
And...how do you secure the scotchbrite pads to the drill press chuck?

04-12-2016 06:23

DaveL

Re: pic: ???

Nice.
I first thought tank drive, but the holes did not line up with my theory.

Dave

04-12-2016 11:37

SerpentEagle

Re: pic: ???

We used .09" thick 6061 for the gussets. They pretty much blend in when you polish them with Scotch Brite pads haha.

Just google "Scotch Brite circular pads" online. They come with a these circular pads that screw onto a holder that you can use in the drill press. Feel free to PM me for more info.