That looks amazing :D
They may not be the most effective weapons around but gotta love the retro nature of chainsaws.
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That looks amazing :D
They may not be the most effective weapons around but gotta love the retro nature of chainsaws.
Dude that's brutal!
Ah, now I now how I can complete a design of mine! Watch out plastic robots!
Chainsaws FTW!
I'm liking the look of this chainsaw Mike :)
You know... you could probably get away with using military/emergency rescue chainsaw chain, as that stuff is designed to hack through metal and ice... just some food for thought from your friendly neighborhood Arboriculturalist ;)
Spanky is wired up and running. Weight is just a hair over 22lbs as pictured, leaving almost 8lbs for weapon configurations. The spike wedges are 1lb 3.4oz and will be used primarily with the axe and hammer weapons. I'm intending to armor up the chainsaw and circular saw attachments as heavily as the weight budget allows me.
Here's a finished shot with the high visibility paint job-
http://nearchaos.net/WiredAndReady.jpg
How do you get such clean straight cuts on your metal?
It's all waterjet cut.
This is looking great! Nice to see some classic style weapons. Thing looks nasty, might actually be quite effective.
It would seem you have lots of experience with watercutting... generally, how is the quality of cut across thickish material (15mm alu, for example)? I'm a bit worried about the inaccuracy and taper of the cut edges. Do you think that's a reasonable worry?
It certainly can be an issue. Higher end waterjets (like the one Team Whyachi has) have taper compensation as part of the design. The ones that don't will have a pretty obvious taper even on thinner material. For this bot, once everything was cut we went over the mating surfaces and flattened them with a belt sander to get things squared up.
http://bigbluesaw.com/ is another waterjet resource, they've got two options, regular and low taper, which are exactly what they sound like. http://bigbluesaw.com/index.php?opti...&thickness=0.5 shows a rough price comparison with a sample part. Best thing to do generally is to get all of your same thickness parts cut at once so you only have to deal with one loading fee. http://bigbluesaw.com/saw/faqs/parts...t-cutting.html has a good comparison of low vs. regular taper.
That last link shows a significant taper for regular services. Surprisingly marked. Likely to be problematic in my case.
Well, that changes things, and likely not for the cheaper! Thanks for the response and links. May have just made a decision for me. :)
Looks really cool, what size are those wheels, and do you have any pictures of the internals, looks very compact!
It's got 8" wheels (http://www.robotmarketplace.com/products/NPC-PT318.html)
I'll take a few internal pictures tonight and post them. Not a ton to see as it's just three esc's, (weapon one is permanently installed) a power switch, rx, battery, and battery padding.
That looks great mike
Here's an internal shot, it's very tightly packed-
http://nearchaos.net/spankywired.jpg
First test video with a placeholder attachment to avoid damaging the floor:
https://www.youtube.com/watch?v=XNzqec3MfhU
That has to be one of the best overhead thwacky bots ever! Cool! It's going to be nuts with the chainsaw if it's anything like as twitchy as that. How will the heavier weapons affect the rapid swinging?
Insane
Still have to make the legs/feet for both configurations, but the weapons are coming along well-
http://nearchaos.net/SpankyActiveWeapons.jpg
Looks scary, where does the weapon motor go?
That . Is . Awesome
Weapon motor for the chainsaw will be positioned similarly to the circular saw motor, the shaft that's there is a placeholder until the motor/gearbox arrives.
Test spin of the chainsaw attachment:
http://www.youtube.com/watch?v=5Xy1e7Y-q2M
Real gearboxes should ship mid week, which means I may have it properly working by next weekend.
Finished up the last of the work on the active weapons today. The weight with the circular saw is 29lb 10.8oz and the weight with the chainsaw is 29lb 5.8oz. The axe attachment is done, and there's just a bit left to do on the hammer.
http://nearchaos.net/Spanky800wd.jpg
I've been working on designing a new Nyx for Motorama 2015. It might get done in time for Dragon Con, but I'm planning to take my time and do it right.
Lifter:
http://i.imgur.com/SGarvVi.jpg
Hammer:
http://i.imgur.com/u9iSDtt.jpg
Crusher:
http://i.imgur.com/ULQ5KMZ.jpg
The core concept is that the ~17lb base platform can have the weapon modules quickly swapped to adapt to the arena/opponent of the moment. My target is a changeover time of under 5 minutes between bot on the table and bot ready to fight again with fresh batteries.
Lifter runs a DeWut in low with an additional 9:1 reduction to a ~23" arm.
Hammer runs an a28-150 Ampflow with 18:1 reduction to a 14.5" arm mounted via a 60ft-lb torque limiting clutch.
Crusher runs dual Gimson GLA750-S's current limited to ~500lbf each. With the effective reduction due to the linkage I'm anticipating approximately 670lbf at the tip of the claw.
Excellent stuff mate. Love the CAD.
This is impressive. The interchangableness reminds me of The Master.
Axe attachment is pretty much ready to go- http://i.imgur.com/Nds6Yxm.jpg
Video from Clash of the Bots 2014 is up and has been sorted into convenient playlists for easy viewing:
150g:
https://www.youtube.com/playlist?lis...-wDafZ6iJYtWTc
1lb:
https://www.youtube.com/playlist?lis...QGsffdsuuGkq3p
3lb:
https://www.youtube.com/playlist?lis...9i91SddZbrRQOc
Super cool man. Clamp and lift?
The arm floats, so more in the clamp/crush end of things. The idea with the floating arm is that even if the opponent is awkwardly shaped it'll give a much better chance to keep all of my wheels on the ground for better drive/pushing.
I've got all my video from Dragon Con Robot Battles 2014 posted and sorted into handy playlists:
1lb:
https://www.youtube.com/playlist?lis...kRStOquhV_aKfy
3lb:
https://www.youtube.com/playlist?lis...0lxDhLEkB1JNTs
12lb:
https://www.youtube.com/playlist?lis...jOaJE6k-5rfPvU
30lb:
https://www.youtube.com/playlist?lis...9KSEUpvUufUCiU
Pretendobot Crusher Edition:
http://i.imgur.com/M6FmrU2.jpg
Very neat. How far from completion?
Figure there's a 50% chance it'll be done by Maker Faire Atlanta the weekend of October 4th.
https://www.youtube.com/watch?v=ytVYWncox_A
Test of the crusher attachment on Nyx. I'm not cranking it up to full force as I don't want to risk damaging the armor on Spanky. What this video does show is how the floating arm functions. The goal of the arm design was that it'd be able to deal with a range of chassis heights without lifting any of its own wheels off the ground in the process.
That is extremely cool.
Spent today working on the hammer. Running at <30A per half of the mag (55-60A max current) it was nearly able to punch through 1/8" 5052 alu. Initial functionality tests are going to be done at lower power just to make sure everything's tracking properly. Competition settings will be 65-70A limit per half, so in the neighborhood of 130-140A.
http://i.imgur.com/BnNKXkn.jpg