This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.
Messages - MikeNCR
Pages: 1 ... 15 16 17 18 19 20 21 [22] 23 24 25 26 27 28 29 ... 58
421
« on: October 24, 2011, 02:34:56 PM »
Tempting, but way too much liability to get sued if I tried that, plus it'd have to be well over $250 when labor costs are accounted for. I also wouldn't have an infinite supply of free pallets and plywood. (I got the ones for the arena from the shipping department at work from the scrap pile)
422
« on: October 24, 2011, 11:28:13 AM »
Nice arena. Part of me was expecting a giant NCR logo in the middle though :P
Arena is mechanically complete, still planning to add some paint but it's otherwise done.
423
« on: October 23, 2011, 06:45:33 PM »
Arena is mechanically complete, still planning to add some paint but it's otherwise done. 4' x 4' combat area 2x 1' pushouts 1/8" thick steel walls Side mounted casters and pallet base for easy transport Cost: <$150 
424
« on: October 21, 2011, 11:23:57 PM »
While going that route is cheaper, it may not be the best option.
There's a lot of stuff you have to learn when building a robot and a lot of skills that need to be built. You're ignoring most of what makes the kits worth the money. They're a reliable, tested, and stable platform to build on in classes that get run at the majority of events.
Both routes have pros and cons. If you go the kit route, you don't need as much mechanical skill, and you're paying extra for reliability. If you go the complete DIY route you might save money on the initial build if you get it right the first time, which doesn't always happen, and there's the distinct potential that you've messed something vital up in the design and will either need to redesign part of the robot before it's even ready to run or rebuild it after the weak spot gets found in the arena and the internals get bounced off the wall.
With either option, you need to be willing to spend an event or three figuring things out, as something will go wrong and learning from the problem is what makes for better bots.
The choice between kit and DIY comes down to these two questions:
Do you want something that's fairly reliable and easy to put together so you can get something working into the arena?
Do you want to build something from scratch, even if it takes a few tries before it's really working "right"?
425
« on: October 21, 2011, 06:53:01 PM »
426
« on: October 21, 2011, 06:33:39 PM »
A bit more arena work done today. Planning to get all the sides screwed down tomorrow. 
427
« on: October 20, 2011, 09:36:56 PM »
Kobalos got a bit of a ballast/armor upgrade. Two layers of 1/8" steel, inner layer is bolted to the chassis, outer is goop'd to the inner layer. Weight is 453g. 
428
« on: October 19, 2011, 07:11:33 PM »
Did a bit on the arena today, still need to get another section of L bracket and get all of them mounted. Planning two 1' pushouts on the sides with the close edges. 
429
« on: October 18, 2011, 06:26:35 PM »
I'm building a practice arena out of an old pallet and some scrap materials soon so my gf and I can practice(MCM is her bot) and so some local friends that want to learn how to make robots have a place to get used to driving them, so videos should get out eventually.
430
« on: October 18, 2011, 04:25:43 PM »
Motor City Massacre has a fully functional grabbing/lifting arm now- 
431
« on: September 29, 2011, 11:33:17 PM »
It's tough to get a scale of things from a cad image. Here's a printout of the 30 next to Apollyon- 
432
« on: September 26, 2011, 02:58:53 PM »
Edit: Wrong thread
433
« on: September 25, 2011, 11:39:52 PM »
A good portion of the difference is a geometry/physics issue brought about by the whole "no wedges" rule for the sportsman class.
434
« on: September 24, 2011, 10:57:33 PM »
Holmes Hobbies is now an official sponsor of Near Chaos Robotics. Check out their stuff.
Some of you have seen the abuse the BR-XL's have held up to, but for those that haven't the only way I've killed any of them in my 12 or 30 was in this video-
If you look closely at around 26s in the video two little black boxes come out of the chassis. Those are the BR-XL's, which are then hit directly by Steel Shadow.
435
« on: September 21, 2011, 11:54:56 PM »
Omega Force has a lot of power for an open-arena bot.  Good job with your Dragon*con win.
Thanks. Omega Force is a neat bot. http://www.wa4dsy.com/robot/omegaforce2-robot has a bunch of info on how it works.
436
« on: September 15, 2011, 10:21:21 PM »
^WINNAR^
I love how you've set it up to accomodate different weapons for different opponents- From what I can see, there's a battering ram, a lifting scoop, a vertical spinner, and a lifting spike (reminds me of Invertabrat from Robot Wars Series 3, actually), am I correct?
1. Dual flipper(can either lift the front wedge up, or push it down, forcing the bar that extends over the back of the robot to act as a flipping arm/righting device. 2. Powered wedge plate, because some bots will be easier to deal with using a wedge. 3. Lifting/grinding disk. Dragon*Con limits spinning weapons to 20ft/s because of the open arena, this spins at almost exactly that speed and lets me have a continual grab and lift mechanism. (in theory, anyway) 4. Powered ramming spike, the hope being to impale the opponent then use the hole as a lift point.
437
« on: September 15, 2011, 09:58:24 PM »
I've put a lot of time into the design for Nyx in the last week or so. Here's the latest chassis setup with 4 of the possible attachments shown- 
438
« on: September 13, 2011, 04:12:29 PM »
Wheels in a way act like an additional stage of gearing
For example, a 3" wheel will roll 9.42" per revolution, as the circumference is pi*diameter, in addition the wheel functions as a 1.5" lever arm(radius of the circle)
Say you've got a 1000rpm gearbox with 90in-lbs of torque attached to this wheel, that means in 1 second the robot will travel 157 inches, or 13.08 ft. In addition the force the motor can exert at the wheel will be 60lbs, as the effective lever arm results in a reduction of force (90 / 1.5 = 60)
Perhaps you want to go faster, so you shove a 6" wheel on, this will result in a top speed of 26.16ft/second but due to the greater lever arm, you'll only have 30lbs of force on the ground. For every doubling of diameter, you double speed and halve the force, meaning you may get to a higher top speed, but you'll take a lot longer to get there.
440
« on: September 10, 2011, 04:24:38 PM »
For the serious bot, what are you planning for radio gear/drive/batteries/speed control etc...?
Pages: 1 ... 15 16 17 18 19 20 21 [22] 23 24 25 26 27 28 29 ... 58
|
Show Posts