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Messages - rcjunky

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1
Progress Reports / Re: Team Brain Damage
« on: March 22, 2020, 10:14:18 pm »
https://youtu.be/PbBoY0UBnwU

this was quite amusing

2
Progress Reports / Re: Team Brain Damage
« on: March 02, 2020, 02:08:55 am »
Nothing worse then going to a once a year event and getting almost no data on what you need to improve. I guess this means you've got time to work on magneto for franklin/moto ;) All that said, that Crimson Snow fight was spectacular while you were spinning.

3
Progress Reports / Re: Canadian Carnage Robotics
« on: February 13, 2020, 12:04:20 am »
Everthing is packed, hitting the road in the morning, everyone have a safe trip and see ya at the farm show complex.

4
Progress Reports / Re: Team Brain Damage
« on: February 10, 2020, 02:28:09 pm »
Looks like the public version is available (and installing now) but not the test version (which is fine by me)

Sounds like you have everything pretty sorted out from what you learned last year, I look forward to seeing how the bracket treats you this year. I've always got a soft spot for shell spinners

5
Progress Reports / Re: Team Brain Damage
« on: February 09, 2020, 11:24:43 pm »
app is listed as not available in this country :( any way to let the canuks in on this goodness?

6
Progress Reports / Re: Team Brain Damage
« on: February 03, 2020, 01:07:31 pm »
I've found the blues get pretty torn up on 30lb drive but blacks were much better. In this case I do think uhmw is the way to go and look forward to seeing how it holds up.

7
Progress Reports / Re: Team Brain Damage
« on: January 30, 2020, 06:51:12 pm »
That's fair, it would need to be a hub to retain the bearings and hold its shape for sure, so an aluminum hub with a uhmw tire basically, but as you said at that point using the same stuff as the drive wheel would be safe too. Bonus points if you could make then the exact same to reduce the needed spares.

8
Progress Reports / Re: Team Brain Damage
« on: January 29, 2020, 03:26:39 pm »
With the idler, why not make it uhmw? it does't need any traction beyond enough to spin the bearing instead of melting a flat spot and could have some cushion if needed over say aluminum, and would be lighter most likely. Looks good so far and you've got 2 weeks to polish up the final details.

9
Progress Reports / Re: Team Brain Damage
« on: January 24, 2020, 01:49:34 pm »
I'm curious to hear how those switches work out for ya. Any plans on labeling them with something fancy like custom stickers?

10
Progress Reports / Re: Canadian Carnage Robotics
« on: January 13, 2020, 08:12:29 pm »
Its all good :)

People like you guys is why I put my thinking cap on for the last year. We had an awesome match while I was trying to make it 3 in a row for Canada and fell short so I needed to change something. I sent the bot for quite the series of plane rides to get some more run time at an event in Seattle and some more doing sumo "locally" to try a few small things and made a decent revision specifically for moto. When I'm not posting all the details anywhere before the event ya know I'm not messing around ;) I did some testing as well with some lift esc tuning and have it turned way up too so its more of a yeeter then a lifter :P Last year it was current limited to 30a at moto, ran 60a at Seattle and BotBrawl, its now at 80a and the data logs show 65a peak with some conservative testing. Thats a lot of power behind the arm. I'm sure with the weight further out (in testing it was like 27lb entirely in the forks) from the bigger bots I suspect it'll hit that current limit still. I look forward to a rematch, I'm sure I'll be fighting at least one of your entries this year.

I think the hub motor on AbsurdiTi is where it needs to be now, it feels a lot more solid and the new bars on paper should hold up well. We're a month away yet but I feel the most prepared for a Motorama yet and this is my 5th in a row (plus 2 for rc racing before that, so 7 consecutive years)

11
Progress Reports / Re: Canadian Carnage Robotics
« on: January 08, 2020, 07:19:34 pm »
This weekend I moved about 5 hours away from home which means all my moto prep had to be done already. This makes it the first event I've ever been totally ready for well ahead of time

AbsurdiTi has treated me well in 2019 including getting 3rd at the bigger combat event in South Korea and winning the last bot brawl event. With this success I think this could be the last set of revisions for it to make it just a bit better. I redesigned the weapon hub to use bigger bearings that should not only be more durable but be more rigid. I got these made by EngineeringNetwork and they turned out beautiful. I probably slightly over toleranced the bearing and rotor bores, all being 0.0005" or smaller, but the parts all went together beautifully. Dealing with Dave was a breeze and met the needed delivery date after I dropped the ball in getting these made. Getting them anodized really gives them a quality look and I look forward to seeing how they work.




Since I was getting some waterjet cutting done I decided to try a different weapon bar material and got 2 different designs cut. I still had to grind them to thickness to keep the weight reasonable but they sure look good. I opted to try a single tooth design as well as a similar design to what I've previously ran. With over 130g of spinning mass at well over 10k rpm I figured single tooth would be the way to go to get the big hits and I made the symmetrical bar a bit lighter for when faster spin ups are needed. I made the last bar a bit soft to make sure it didn't fail given I only made 1, but these are right around 50hrc so should take hits from ar500 weapons better as A2 in the low 40's didn't like that much.



The last change is the frame itself. The new weapon assembly needed a couple small changes to the frame but otherwise it's basically the same as the last version. I got a bunch of spares ready to go so I think it's just about all ready now. With all these revisions and given how the last couple events have gone I've got high hopes for motorama, but when you show up to the biggest event in North America nothing is guaranteed.



Llama Sheen has also gotten a slight bit of attention. I've been testing a lot to make sure turning it us is safe so it's got well over double the power now. I've also tweaked the fork design with the biggest change being to the tips. I'm hoping the wider tips will prevent them from doing woodworking once the floor gets beat up a couple fights in. Even though I finished 2nd last year this year won't be easy. Lots of teams have really been steeping it up so I'm sure winning rounds won't be easy. I've got a lot more time on the bot now (I finished it the morning of the first fight last year) and like the tweaks so I think it's all ready to go. With the big MaxAmps pack in drive I definitely shouldn't be losing the first fight for running out of battery like last year. Llama is now a year old after a year of design/building, so I hope that these slight tweaks really make it shine after having 0 time on it before its first event.


12
Progress Reports / Re: Team Brain Damage
« on: January 08, 2020, 07:08:53 pm »
The event certainly sneaks up fast. I'm in school now until early March so I needed everything done by last weekend, I'll throw an update up here now. I definitely think going to the AR was a good idea, since heat treating something like the 4130 would have been mega risky. Its good to hear it held up pretty good. I look forward to seeing it spin more this year ;)

13
Progress Reports / Re: Team Brain Damage
« on: December 06, 2019, 01:20:14 am »
That let Ravi get a spot, thanks for the heads up. Given I didn't see this for 5 hours because night shift, clearly pays off to monitor this forum :P I should have some content to share soon. I'm looking forward to seeing how your changes work out, I just like seeing shell spinners work well ;)

14
Progress Reports / Re: Team Brain Damage
« on: November 29, 2019, 08:18:59 pm »
Every year round 1 is nuts and round 2 gets shorter and shorter. This year I think round 2 was harder then round 1 to get in. The site was down for me until there was like 5 spots left between the bigger classes, good thing I was already in. As with every year, its gonna be good times.

15
Progress Reports / Re: Team Brain Damage
« on: November 29, 2019, 07:26:12 pm »
The crazy starts in 1/2 hour, hopefully ya get in, if not gotta wait list your way in

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