Author Topic: Lucas's bots  (Read 45721 times)

Lucas Grell

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Lucas's bots
« on: February 18, 2015, 01:07:32 am »
I've been meaning to put this up for a while, so here it is.
The first bot I worked on was a 15 pound wedge called Fer 'Merica.
I don't have many pictures of it, but here's a video of a rumble at the 2013 NRL nationals; it was one of the first times I drove, since technically it wasn't my bot (We do this through our school, Proctor High School, so it's kinda weird sometimes), even though I did nearly all the work on it.
https://www.youtube.com/watch?v=F3goNLXUM1Q
All of the bots in that fight were either Proctor's or a Proctor graduate's bot.
I've still got one of the wedges, here's where it took a few hits.


The next year, we decided to retire GTO and G6, the two beater bots in that video.
I set out to make a new one, and started with this guy, which I called Uprising.
https://www.youtube.com/watch?v=n9sjNVNvPxg

This year, I drew up Minor Threat, another 15 pounder beater bot, but a lot better thought out this time.

1/8" TI armor all around, sliding wedges, 4 wheel drive, and a 6" diameter weapon.
I completed an early version with steel armor and no weapon a while back, here's a picture of it with Proctor's other bots for this year lined up. Weapon is one of the ones off of GTO just for mock up purposes.

Here's the electronics, but mostly, a look at the armor.
Wiring is nasty because it's from last years bot and I haven't bothered to clean it up for the shorter distances on this bot.

These are the new Ti armor pieces, before I milled them to the exact sizes and hole locations, and the weapon, also rough cut on a waterjet.

Here's the weapon mounts and weapon motor.

Cross brace, slots into the weapon mounts, bolts to the bottom, armor, and top plates.

I've done some more work since these pictures, I finished the wheel mounts and a new top plate, and I'm starting to countersink the Ti, but I burnt up my last shitty countersink, so I'm waiting on some nice ones.

Harry Hills

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Re: Lucas's bots
« Reply #1 on: February 18, 2015, 05:07:43 am »
As a man currently wearing a Minor Threat t shirt I can't help but approve!

What is the final reduction you have on your drive system, and what kind of speeds to you get?

Joe Doerfler

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Re: Lucas's bots
« Reply #2 on: February 18, 2015, 06:40:33 am »
So what tacons do you use. I know that they are the 380s series but what kv

Lucas Grell

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Re: Lucas's bots
« Reply #3 on: February 18, 2015, 08:18:55 am »
The belt reduction is 1:1 to the rear wheels to 3 inch colsons, and 1:2 to the front ones which are 1.5". The gearboxes are 16:1s, and those are 1800 KV Tacons. With losses its somewhere around 12-13 mph.

http://www.hobbypartz.com/96m280-2848-1800kv-22t.html
« Last Edit: February 18, 2015, 08:20:31 am by Lucas Grell »

Koolaid64

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Re: Lucas's bots
« Reply #4 on: February 18, 2015, 09:28:11 pm »
so what speed controllers are you using to drive the tacons?

Lucas Grell

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Re: Lucas's bots
« Reply #5 on: February 18, 2015, 09:31:59 pm »
Tekin RS ESCs, they're small and can handle a lot of current, not to mention near impossible to kill.
I only wish I could find sensored 380s with a reasonable KV, the only ones I saw were short novaks with 3k Kv or so. Would really be able to take advantage of these controllers then.
Literally the only downside is price, but they've lasted me going on three years of abuse.

Koolaid64

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Re: Lucas's bots
« Reply #6 on: February 18, 2015, 10:06:52 pm »
interesting, and they have no pause when switching from forward to reverse?

Lucas Grell

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Re: Lucas's bots
« Reply #7 on: February 18, 2015, 10:08:29 pm »
Yup, it brakes then automatically reverses, no thumb magic required.

Joe Doerfler

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Re: Lucas's bots
« Reply #8 on: February 19, 2015, 08:00:15 am »
I use castle sidewinder micro, they can handle 2-3 cells, but this year im going to try 4 cells on them since UC3 hasn't burned one up while doing that. All you have to do to the escs is to program them,  because it has a brake on them

Joe Doerfler

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Re: Lucas's bots
« Reply #9 on: February 19, 2015, 08:02:25 am »
Also Lucas, what are the little pieces on your cad, I always see UC3 have them on and was wondering what they were.

Lucas Grell

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Re: Lucas's bots
« Reply #10 on: February 19, 2015, 08:21:07 am »
Which parts? The little blocks on the back of the motors are supports, if that's what you meant. Helps a lot with saving motors and gearboxes from pinion failure.

Joe Doerfler

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Re: Lucas's bots
« Reply #11 on: February 19, 2015, 08:31:48 am »
No, in the front of the robot, there is like 4 little copper colored things idk what they are.

Lucas Grell

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Re: Lucas's bots
« Reply #12 on: February 19, 2015, 08:46:59 am »
Oh those are sliding wedges, they let UC and hopefully me get under pretty much anything, I figured you knew what those were for. The armor is pretty low on both bots but it isn't right on the ground, of course. I've always been surprised I never saw more bots using stuff like UC, but I guess since I fight him every month I get exposed to it a lot more.

Badnik96

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Re: Lucas's bots
« Reply #13 on: February 19, 2015, 09:43:17 am »
Sliding wedges? That's interesting. Never seen that used anywhere before. I assume they're just wedgelets with holes that let them slide?
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Lucas Grell

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Re: Lucas's bots
« Reply #14 on: February 19, 2015, 09:52:56 am »
Yeah, pretty much. Here's a picture of them on Kevin's bot.