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Messages - MikeNCR
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341
« on: January 21, 2012, 02:05:38 PM »
Looking fantastic so far. Does the weaponry not move a little bit quickly, with that low of a ratio?
The weapon ratio gives 400rpm and 570lb-in of torque at 24v, so it should be fast and powerful (able to lift twice the weight limit at the end of the long flipper arm)
342
« on: January 19, 2012, 10:46:46 PM »
Hm. So a wedged VS wouldn't work? Bleh. I have other designs in my head anyway.
The general concept's fine, I think more the point was that you should look at the proportions/quirks of that style of bot to see what design issues pop up.
343
« on: January 19, 2012, 10:14:44 PM »
You missed the part where I mentioned that that was with the rest of the electronics placed on top.
344
« on: January 19, 2012, 09:40:24 PM »
Here's what I got done today- 
345
« on: January 19, 2012, 10:31:49 AM »
yep, they're the outer axle supports. I'm taking a ton of pictures, so there will be more to come, along with a Servo Magazine article and a detailed instructable. I'm thinking I may even post the cad files for the chassis as part of it.
346
« on: January 18, 2012, 05:41:18 PM »
347
« on: January 17, 2012, 01:30:01 PM »
If you've got access to a drill and hand taps you can get the same effect with square stock or L brackets that are thick enough to hold the threads. (For aluminum, a good thickness is about 2x the diameter of the bolt)
348
« on: January 17, 2012, 12:21:22 PM »
Here's a few pics showing how I use it-   What I do is pic areas that I want to use as attachment points and use short lengths of it in those areas for mounting. Doing solid bars would be stronger, but much heavier and putting all of the screws in would take a long time. I normally use lengths between 2x2 and 4x5, with the most common being 2x3.
349
« on: January 17, 2012, 12:05:18 PM »
There's a ton of different approaches to that, and which will work best depends on what you've got access to and what you're comfortable doing. Quoted from my intro guide at http://nearchaos.net/guide.htmlChassis Construction
Chassis construction generally takes one of a few different routes. The first is an internal frame with armor attached to it, the second uses the frame members as armor, often with connected plates of material forming the structure, and the third is unibody construction, where the majority of the frame and armor are cut from a single piece of material.
Building a chassis using an internal frame with armor panels mounted to it tends to be the heaviest of the three options, though often will be the most durable and easiest to repair as the portions of the armor most likely to be damaged are easier to remove from the rest of the robot. These frames typically involve a welded frame with armor bolted to it.
Frame as armor construction is generally in the middle when looking at strength vs. weight. By reducing frame and armor into a single part, you can reduce the size of the machine and use relatively thick materials in areas likely to come into contact with weapons. Frames like this are more often than not bolted together.
Unibody construction will typically be the strongest per pound, however it is also the most complicated to manufacture, as all features will need to be added to a single piece of material. This often involves repositioning the work piece many times during the construction process. Care must be taken to avoid misalignment of holes as the work piece is moved. The good strength to weight ratio, the best of the three mentioned, is due to the reduced need for fasteners to hold the chassis together and the lack of areas only held on by hardware. There's tons of different factors to look at. As of late, I've been using flat sheets with hole patterns in them with Nutstrip attached to connect panels at right angles- http://kitbots.com/product.sc?productId=17&categoryId=1
350
« on: January 16, 2012, 04:26:45 PM »
I've noticed most roboteers take pictures of stuff next to a coke can. I think it's just to get an idea of the scale of it, because a can of soft drink is a very common thing for someone to have, and know what size it is. Exactly. Something you've held in your hand gives a much better sense of scale than stating dimensions.
351
« on: January 16, 2012, 04:16:39 PM »
352
« on: January 16, 2012, 12:42:05 PM »
That's fine by me Mike, just the next person who gets a bot to me saying they want to be in your team?
That'll work.
353
« on: January 16, 2012, 11:49:15 AM »
Way to screw him over.
MikeNCR, feel free to submit another bot or find another partner.
Well, how about this- Spot two is open to whoever claims it/sends a bot first.
354
« on: January 15, 2012, 04:44:17 PM »
355
« on: January 14, 2012, 08:16:11 PM »
So technically it is still unrealistic....
Yep, it's only considered realistic by a lot of people/tourneys because it's simulating something that can and has been done repeatedly in robot combat.
356
« on: January 14, 2012, 08:08:37 PM »
As requested:  There may be other ways, but that's the setup I use.
358
« on: January 14, 2012, 12:48:33 AM »
Decided to finish up the spare wedge tonight- 
359
« on: January 13, 2012, 12:11:19 PM »
Looks nice, though you'll probably want to trim the sides a bit so the teeth are more exposed for the final version.
360
« on: January 13, 2012, 09:03:49 AM »
it'll have to wait till tonight, since I don't have RA2 on my work computer.
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