Antescher Assault Systems build diary

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Derek Dudge
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Re: Antescher Assault Systems build diary

Post by Derek Dudge » Sun Jul 01, 2018 12:03 pm

Suspicious Humous won best robot name of the day for me 😂 I liked the spikes. At one point it looked as you had a spike jabbed in underneath an enemy flipper. Pretty cool.
My robots:

Third Law (antweight) - push/ram bot
Manticore (antweight) - hammer bot

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MarkR
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Re: Antescher Assault Systems build diary

Post by MarkR » Sun Jul 01, 2018 2:16 pm

We should organise a secret ballot where each team gets a vote on "best robot name", and can vote for as many as they want (but not their own).

Yes, Suspicious Houmous is a good one.

Worst combined robot names goes to Flippant and Flip Pant for being too similar.
Robot: Betsie - RaspberryPi controlled flipper bot with gyro stablisation - too clever for her own good?

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voorsk
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Re: Antescher Assault Systems build diary

Post by voorsk » Sun Jul 01, 2018 4:23 pm

Derek Dudge wrote:
Sun Jul 01, 2018 12:03 pm
At one point it looked as you had a spike jabbed in underneath an enemy flipper.
yeah, that was exactly what I'd hoped to do. :D i like to think that if the lifters could've lifted, I'd have lifted him up at that point, and gracefully dropped him over the edge of the pit like a pro. :roll:

ah well, there will be a next time. can't wait to lose again!

i like the name competition idea, although i think a best looking robot would be good too. my son liked diotant the best, and i liked bramble. as for names.. "I’m Going To Hit Your Face, With My Face" made me laugh, so I'd vote for that. :)

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MarkR
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Re: Antescher Assault Systems build diary

Post by MarkR » Sun Jul 01, 2018 5:23 pm

Did it have "This is hardox" written on its front scoop? At least in one fight against a brutal spinner?
Robot: Betsie - RaspberryPi controlled flipper bot with gyro stablisation - too clever for her own good?

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voorsk
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Re: Antescher Assault Systems build diary

Post by voorsk » Sun Jul 01, 2018 5:55 pm

yep, although something made me think it may have been a bit of a fib. :p

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voorsk
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Re: Antescher Assault Systems build diary

Post by voorsk » Tue Jul 03, 2018 7:39 am

last night, the araldite on the lifter motor hardened, so i thought I'd see what it could do. :D

unfortunately, it was not to be. something has gone a bit wrong..

https://youtu.be/QdWEqtVWWpA

it seems like the motors are randomly pulsing back and forth. the erratic circular motion might be due to one of the motors having a faster reaction time than the other - it's hard to say. maybe it'd just go back and forth if they were identical.

this time i stripped it down to just the battery, esc, and motors, with the bind plug in and the tx off. it's pretty weird - it was working at AWS 55 after the fights. i guess it's either the ESC or one of the motors causing some weird feedback effect. maybe a metallic fragment has got in somewhere

I've ordered two dasmikros, just in case.

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voorsk
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Re: Antescher Assault Systems build diary

Post by voorsk » Thu Jul 05, 2018 11:31 am

Last night, I finally got around to testing Suspicious Houmous's lifters in their glued state, and, as is usual in my roboteering journey, things didn’t go to plan. :P

As I couldn’t use the NanoTwo’s RX (need to get some compressed air to try and clean it), I attached a servo tester to the Vex 29, using a bucophedon as a BEC. My phone weighs 143g, so I plonked it across the lifters and slowly raised them..

The bot tipped itself forwards.

Nadgers! Probably not an issue in combat, with the wheels driving the bot forward, against an opponent with a less dense weight distribution, and not trying to actually lift them. Next, I tried holding the bot down..

The internals flexed and the gears juddered about without lifting.

Nadgers! I knew I should’ve given the lifters proper mounts, but I was worried about weight. At least the araldite held.

So.. um.. fail. :-? It got me wondering if my idea was rubbish, so I looked up what kinds of lifters were in Robot Wars. Surprisingly few like mine, it turns out. Closest is a US competitor called Probophobia, which is so similar that I’d almost question whether I copied it or not. Except I’ve never seen US robot wars, so I don’t think I did. I’ll interrogate myself further, later. :P

A redesign is certainly in order.. it might wind up looking totally different, as having the lifters go 360 degrees seems a little pointless on an invertible bot. Is it okay to use the same robot name, even if the robot changes a lot? It’ll still be a lifter!

The next event I'm going to is BotFest at the end of the month, and I've got two bots registered that don't currently exist (Suspicious Houmous has now been dismantled). I'd better crack on! :o

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voorsk
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Re: Antescher Assault Systems build diary

Post by voorsk » Mon Jul 09, 2018 8:40 am

oh, man.. the AWS 55 video is up on youtube (https://youtu.be/CYe_PA5pmVA), and my fights were worse than I remember. :o

First one is at 12m3s, and you can see me getting stuck on the spikes almost immediately (looks like it might've saved me from instant death, tho) as I got mixed up. Then I got the spikes up and thought they might be able to snag the mini pig trail, but obviously got pushed into the pit for that, because that's what I'm meant to fall for. :P

Second fight is at 1h10m9s, which I had thought didn't go too badly, but it looks like it did. Wheelspinning all over the place, getting mixed up when flipped, then feeding myself into the flipper. No wonder I lost traction - I was in a bot! *insert houmous-eating joke here*

At the moment I'm pondering the next robots. Axe placement on Fermented Melon is tricky, but I'll get there. I want to make a 4wd rambot out of hollowed/layered HDPE (Sprouting Potato), and I think the next iteration for Suspicious Houmous might be a wedge-ish shaped lifter using the big orange wheels that I mentioned earlier on in my posts. It may wind up looking a lot like Tik-Tok, but that's no bad thing - that robot was ace!

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voorsk
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Re: Antescher Assault Systems build diary

Post by voorsk » Tue Jul 17, 2018 3:00 pm

RIGHT! That's IT! I'm gonna buy a ruddy 3D printer, and be done with my inept fabrication skills getting in the way of my imagination. :P

I've got until the end of the month to sell up stuff from my previous hobby splurges (lots of retro MTB stuff, and a modded Commodore Amiga A600), and to convince the wife (who's already fed up of me sitting on the sofa whittling plastic).

No probs! :roll:

So, I'm thinking that a Wanhao i3 Mini seems to be the best bet. Cheap, small, and a known brand.
(edit: ignore that - it can't do ABS fanx to an unheated bed. An Ender 2 or 3 might be better.. still looking and learning)

I used to be good with 3DS Max, and Imagine 2.0 on the Amiga before that, so hopefully I can design something meaningful with Sketchup or summat (altho it seems awful from a momentary dabble). Should be.. interesting! :)

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voorsk
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Re: Antescher Assault Systems build diary

Post by voorsk » Tue Jul 24, 2018 1:56 pm

gawd - not long to go before Sunday and the Botfest! I entered (the now dismantled) Suspicious Houmous and the unbuilt Sprouting Potato.

Sprouting Potato was supposed to be easy.. a 4wd pusher/rambot. Initially I designed it to use two motors linked to the wheels using gears to get 4wd, but changed my mind after realising the mechanism weighed as much as the extra motors. 4 motors should be even easier!

Image

oh, why can't I just keep things simple? Instead of making a roomy brick on wheels, I made it the minimum height, and as short as I thought I could get it. Too short, it turned out. I forgot to take into account the switch and the battery wires - the same mistake I'd made with Suspicious Houmous! :roll: It was close, though!

So, new plan thought up, using proper mounts on a big base plate. I reckon I can finish it tonight, as the new plan is simpler.

As for Suspicious Houmous.. I have no idea! It'd be tempting to reassemble it with a couple of minor modifications to improve the lifter, but the NanoTwo is apparently toast (I suspect it's the RX), and a DasMikro won't fit in it. :-? Maybe I'll try removing the RX module, and see if I can get it going with a different one. Luckily, I already have a spare!

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voorsk
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Re: Antescher Assault Systems build diary

Post by voorsk » Wed Jul 25, 2018 10:28 am

erm.. that new plan for Sprouting Potato i mentioned.. well, i made it at work, without the original to look at..

the space for components was identical! :o even the base plate was the exact same size. i thought I'd left loads of room, too. d'oh!

with a bit of rearranging, changing wire lengths, and removing the switch, i got it all to fit. having the same base turned out to be handy, as I could reuse it. :) behold:

Image

i still need to add side panels and some screws on the front, but it's pretty much done. it's only 119g at the moment, too.

it was quite liberating to have less panels to worry about! :) i left the back exposed because i thought it'd save weight (originally, only the middle was covered, to keep everything in), but i don't think it needs to.

edit:
I feel like I reply too much (altho this is supposed to be a diary..), so I thought I'd just tack a small update onto this post.

Sprouting Potato is done!

Image

Just needs a bit of decorating! :D oh, and the screws on the front need to be fixed properly, somehow - they're a little loose. I think I'll put them through some HDPE on the inside of the polycarb, which will also act like a bumper.

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voorsk
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Re: Antescher Assault Systems build diary

Post by voorsk » Fri Jul 27, 2018 3:51 pm

.. and now for Suspicious Houmous!

The bot still exists, in bits, but those bits are too flimsy for lifting purposes. The lifting mechanism was interesting to make, but also not quite up to lifting accurately, and the axle used up so much room!

So, new plan:
  • Same rough dimensions.
  • Gonna use the same lifting spikes, as I don't think I have time to make new ones.
  • Wheels as far forward as they'll go, for Big Nipper-style driving! :D
  • 1.5mm polycarb top and bottom (bent for the front and back - worked well for Potato).
  • Probably no side armour (depends how the weight goes).
  • Out go the axle and gears!
  • In goes another motor; one for each arm (hopefully the brace will keep them aligned).
  • Remove the araldited gear from one of the motors, as I've only got two. :-?
  • DasMikro ESC instead of the crazed NanoTwo.
Two nights to do it in. I've got all the parts. What could possibly go wrong? :roll:

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voorsk
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Re: Antescher Assault Systems build diary

Post by voorsk » Mon Jul 30, 2018 11:06 am

So, I got nothing at all done on Friday night. It's the only day of the week where there's anything on telly, so it's the day I always spend vegging on the sofa with the wife, the cat, and a few cans of Guinness. :D

So that left two mornings and an evening. I created the shell between 9am and 11am, most of the soldering between 22:30 and 02:00, more soldering and tweaks between 10am and 12am on the Sunday, and out the door at 1pm!

Image

The power switch caused the most bother, ruining my plan for the bot to be 16mm high, and meaning I had to use 20mm standoffs to make everything fit. It didn't leave much for ground clearance, and it barely worked when driven the way it was supposed to (pictured), so I had to reverse the controls and drive it upside-down, even though it actually looks the right way up, as the motors are fixed to the roof. :P

It worked better than at AWS 55, losing two, but winning one! well.. one battle was best of three, so it technically lost 5 and won 2. Still some room for improvement, but it was much more fun! Sprouting Potato lost all 3 of its fights. It didn't do too well at pushing, but mostly it was just bad driving. :roll:

Right, I'll stop for a bit, now. I've been neglecting my Steam backlog!

edit: well, okay - one last update! I just bought a Creality Ender-3 3D printer. :D

Now to break it to the wife...

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voorsk
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Re: Antescher Assault Systems build diary

Post by voorsk » Thu Aug 16, 2018 4:17 pm

Hey, the wife didn't kill me! :D

I haven't had much time to mess with the printer, what with taking a break from footling, and having a minor holiday and stuff, but I have had time to print a PLA test cube on BuildTak, and then two cubes yesterday on borosilicate glass. The first attempt worked really well, despite the bed being slightly bowed, but the attempts on glass were not so good.

First I just tried it without changing anything except the bed level. Weirdly, it seemed like it was even more bowed, but I persevered and started it going.. the first layer was a bit wonky, but it seemed to settle down a bit, so I went off to do my sons shower. When I returned, it was noodle time! It looked like the cube had moved, and the last quarter of the cube was a mess of filament (nice to see the structure inside the cube, tho)

For the second attempt on glass, I turned up the bed heat from 60 to 65 degrees and added some pritt stick glue to the area where it prints. I did it a bit too small, and the outer ring detached immediately, but the cube itself stayed put. Cool! Time to go play Valkyria Chronicles for a bit...

45 mins later, and the cube had completed! Well.. nearly. One corner had warped up by about 3mm. I thought PLA was supposed to be easy? :P

It seems that the warping was probably the extra temperature stopping it from cooling, and the pritt stick was probably enough on its own. There is still an issue with the bed level, though. After doing some more interweb searches, I plonked a steel rule on it, and checked the flatness of the bed. It didn't seem particularly bowed at all, yet the extruder distance was definitely gappier in the center. :-? Tonight I'm gonna check the frame is tight, as apparently there are some nuts on the bottom that are loosened for transit.

edit: Frame tightened (not much improvement), bed temp reduced back to 60 degrees, more pritt stick applied, and the prints are sticking so well that I slightly gouged the first print while trying to get it off of the bed. :P . Behold the first non-box print:

Image
https://www.thingiverse.com/thing:250350 (another EVE Online thing)

Obviously needs a bit of tidying. :) It was pretty stringy, so I need to fine tune retraction a little bit. Looking good to me, tho!

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