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Messages - rcjunky

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16
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 ;)

17
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 ;)

18
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.

19
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

20
Progress Reports / Re: Team Brain Damage
« on: November 28, 2019, 01:09:12 am »
I seen you're not signed up for Moto yet, I assume ya just missed the first window? Next window is this Friday. I kinda want to see how Llama can take the hits from Magneto, especially back driving my weapon with that much force, not exactly something I can test.

21
Progress Reports / Re: Canadian Carnage Robotics
« on: November 13, 2019, 12:21:15 am »
So I managed to make it through round 1 of Motorama's insane registration process so I'll be running Llama Sheen and AbsurdiTi at Motorama 2020 in Harrisburg, PA. I'll be revising the hub motor in AbsurdiTi making it the 4th revision, but some changes have to be made. After finishing 3rd in South Korea and winning BotBrawl, its definitely close to where it needs to be. Llama will also see some slight tweaks but after some interesting lifter gremlins at BotBrawl, I'll be focusing on getting that sorted out. With a 60a current limit, I might be hitting low voltage cut off with the very small dedicated lifter packs.

22
Progress Reports / Re: Team Brain Damage
« on: September 30, 2019, 12:27:47 am »
Have you considered doing long wide outriggers like I use on Llama Sheen to make it more stable on flips?

23
Progress Reports / Re: Team Brain Damage
« on: September 24, 2019, 11:51:41 pm »
I think rear hinged will be more stable when flipping but time will tell. I gotta start posting some updates here too soon. I wish I could do franklin, but couldn't say no to Korea.

24
General Robotics Discussion / Re: 3mm be 1/8” shafts
« on: September 03, 2019, 10:14:15 pm »
I'd advise against interchanging 3mm and 1/8" especially for hubs. You can certainly open a 3mm to hole 1/8", I'd recommend using a reamer so its a nice precise fit. Slop in the shaft/hub area is a recipe for wheels coming loose.

25
Progress Reports / Re: Canadian Carnage Robotics
« on: March 31, 2019, 12:56:59 am »
Just updated the post to include Llama Sheen. I know I missed a bunch of stuff but I do have more pics on my team page on Facebook (@canadiancarnage) but feel free to ask away any questions you may have. Figured this could also help create some conversation here.

26
Progress Reports / Re: Canadian Carnage Robotics
« on: March 19, 2019, 10:35:25 pm »
With all the mess of facebook over it, I concluded the people complaining (non of which compete in the class) basically think its against the spirit of the rules to build a bot with the sole purpose of winning. The rules are also quite clear what kind of wedges are and are not allowed, so I don't get why people hate on legal wedged features. I actually did a rough sketch of a more wedgy yet totally legal configuration but elected to not post it to avoid the mess it would create. At the end of the day we're all here having fun and don't have any issues with either of your teams sportsman entries, other then they're so hard to beat :P I felt those 2 fights were the closest I had all event, and it was a blast. I sent you a pm here a while ago btw

27
Progress Reports / Re: Team Thrasher / Sunny Robotics
« on: March 18, 2019, 11:12:01 pm »
agreed, running a small lower voltage pack for drive with rb70's or aerostar 60's if you run 4s should result in more reliable drive. I know I complain a lot about running dual voltage since it adds a lot of wiring, it is great for some things.

28
Progress Reports / Re: Canadian Carnage Robotics
« on: March 18, 2019, 06:23:29 pm »
The name wasn't my idea (I have 0 creativity) but its so good in so many ways. It all started as a way to fuel a troll and just kept escalating :P Once I write the build post I reserved for it, you'll see some of the silly things I integrated to keep things fun. A select few had/have big issues with it apparently being a wedge and not a sportsman in there eyes.

I have dedicated weapon packs on the lifter that only take 50-150mah/fight so capacity wise its got plenty with the 850mah packs, but its current limited to 30a and I know it hits that when digging for gold in the floor. I plan of turning the current limit up even more and that'll really be hammering those packs current wise but its such a low duty cycle they should be fine. Drive is the issue and there really isn't much space for a bigger pack, its so tight. I don't think its even remotely possible to fit a123 cells in it if I wanted to run franklin. I'm going to need to do some playing around to figure out what I can actually fit with some chassis mods to get a bigger pack in there, I'd like 1600mah but may need to settle for 1300mah unless I literally put the batteries in the lifter arm (which I believe I can do)

Other then more battery capacity on drive and turning up the lifter, it needs more position control at the bottom of the travel. Once I have a bit more of a plan and time (yay big robots) I'll probably be hitting you up for some assistance. The current vague plan is use an arduino to basically have a soft start (to pre load the gear train before dumping all the amps)as well at some kind of sensor (break beam, potentiometer or encoder) to slow the lifter at the bottom 1/4" or so of travel so I can slam it down and be close, then hold down so it'll creep down the rest of the way at a controlable speed. I think all of these need to be done so I can really turn it up to 11. I think improving the lifter will also make the drive battery capacity an even bigger issue as I'll be spending less time parked adjusting the lifter height.

29
Event Results / Re: Motorama Robot Conflict 2019
« on: March 03, 2019, 06:13:30 pm »
 Diceratops was supposed to be Dieceratops per Matt

30
Progress Reports / Re: Canadian Carnage Robotics
« on: February 23, 2019, 06:30:38 pm »
Motorama 2019 has now come and gone, and all I can say is what an event it was. This year I brought the little 150g IntensiTi without touching it since the Canadina Nationals in September, and the all new 30lb sportsman, Llama Sheen. Llama is my biggest, most expensive, most complex build to date, yet was the least prepared I'd ever been going to the event. By the time it was through safety I figure I had about 8 hours of work done to it, and that was only electrical. I managed to get all the mechanical work done before packing up and making the 10 hour drive.

IntensiTi was basically on the back burner and ended up going 0-1, getting to the arena 10 seconds late for its second fight making it a forced forfeit. I never had the time to make some needed tweaks so in its first fight its only issues quickly surfaced. It will be getting the needed love in the future but it may not be until later this year if I go to the SCRC Canadian Nationals again this year.

Getting Llama Sheen through safety working correctly was a huge relief. Going in to the first fight with no practice and never lifting anything I had pretty low expectations. It ended up working really good. With the lifter current limited to 30a (so about 1000w) if had no issues lifting 30lb which was a relief. It can easily be cranked up to double that but don't know what the shock of using basically on/off switches to go up and down. You'll notice in the first and last fights the drive dies at the end of the fight. I planned on using an 850mah pack for drive and it wasn't enough in the first fight. I got a 1000mah into it and it wasn't enough in the last fight. Made it long enough to not get counted out, but give the opponent some free shots. This is one of the areas I'll be revisiting for next event. On top of having 9 fights, I was meant to also fight Beeeees before Aeriform but he had to forfeit after having a few issues in the previous fight and couldn't fix it in 20 minutes which was all we had.

vs Buzzkill
https://youtu.be/WQmemobk_1w?t=10806

vs Conduit
https://youtu.be/WQmemobk_1w?t=22592

vs Major Axe E Dent
https://youtu.be/WQmemobk_1w?t=27672

vs True Grit
https://youtu.be/pWpzgCwqjzk?t=6438

vs Wedding Gift
https://youtu.be/pWpzgCwqjzk?t=11354

vs Buzzkill
https://youtu.be/pWpzgCwqjzk?t=17297

vs Flip Special
https://youtu.be/pWpzgCwqjzk?t=19922

vs Ralph
https://youtu.be/pWpzgCwqjzk?t=21978

vs Aeriform
https://youtu.be/pWpzgCwqjzk?t=28464

Overall I had a blast and had some excellent fights. You'll definitely see more from Llama Sheen moving forward.



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