GeorgeR's robots

All things antweight

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Phil_8
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Location: Hemel Hempstead

Re: GeorgeR's robots

Post by Phil_8 » Fri Jan 12, 2018 2:41 pm

This is awesome!

Pretty much what I am wanting to build

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Shakey
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Re: GeorgeR's robots

Post by Shakey » Fri Jan 12, 2018 11:26 pm

That is one nicely built shiny machine!
Nuts And Bots - For all your components and ready built antweights!

Alex Shakespeare - Team Shakey / Nuts And Bots / Team Nuts:
AWS 44, 45, 49, 51 & 55 Winner - Far too many robots!

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GeorgeR
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Location: Bath, Somerset

Re: GeorgeR's robots

Post by GeorgeR » Sat Jan 13, 2018 10:11 am

Well, I got it wired up, and it worked!.... but then the dasmikro decided to fall apart (one of the signal pads just fell off the pcb), so now I'm in a desperate rush to get a new drive esc. Damn cheap junk.
Team Zero
Zero - rambot - - Axiom - axebot - - Valkyrie - drum spinner
Vampire - horizontal spinner - - Orion - horizontal spinner walker

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MarkR
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Re: GeorgeR's robots

Post by MarkR » Sat Jan 13, 2018 10:16 am

Does the Dasmikro have pin-through-hole or surface pads for the connections?

I'm guessing looking at the pictures that it's surface pads, it's easy to mechanically stress them (e.g. pull on the soldered wire), then the track comes off the pcb. Is that what happened?

I'm guessing appropriate application of heatshrink might be a good solution. What do you think?

(NB: My dasmikro is on its way from China, I hope it gets shipped out before the Chinese new year)
Robot: Betsie - RaspberryPi controlled flipper bot with gyro stablisation - too clever for her own good?

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GeorgeR
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Re: GeorgeR's robots

Post by GeorgeR » Sat Jan 13, 2018 11:08 am

It has surface pads, and the pad came off, (just the pad, it didn't bring any of the rest of the trace with it). I do wonder if maybe one of the wires got knocked in my parts box, I soldered it up for initial testing last month and didn't notice anything dodgy, and the rest of the pads seem ok.
Probably a good idea to go careful when soldering and heat shrink ASAP to provide some protection.
Team Zero
Zero - rambot - - Axiom - axebot - - Valkyrie - drum spinner
Vampire - horizontal spinner - - Orion - horizontal spinner walker

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GeorgeR
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Re: GeorgeR's robots

Post by GeorgeR » Tue Jan 23, 2018 1:01 am

Well, those NanoTwos turned up at the right time, and esc panic was short lived (cheers Shakey and Rory).
Got it all wired up and bodged a cereal box lid so I could get some spinner fine tuning in...

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...and initial results are very promising, the weapon is only very slightly unbalanced, it's fine at low speeds, gets a bit buzzy in the mid power range, but then smooths out high up. This is something of a miracle given it's handmade and I was basically balancing by eye, Yay!

Other good news is that gyro issues are effectively non-existent even at full throttle, so I'll probably use it fully cranked up at all times. I was a little disappointed that it couldn't gyro self-right, but i'm sure better maneuverability will be more useful is most situations.
The only downside is that even with the card top it's 149g, so I've got some weight to cut to get it to 150g with the planned polycarb top.
Team Zero
Zero - rambot - - Axiom - axebot - - Valkyrie - drum spinner
Vampire - horizontal spinner - - Orion - horizontal spinner walker

AntRoboteer
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Re: GeorgeR's robots

Post by AntRoboteer » Tue Jan 23, 2018 9:31 am

Looks absolutely stunning. Love all of your machines. :D

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GeorgeR
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Re: GeorgeR's robots

Post by GeorgeR » Wed Jan 31, 2018 12:01 am

It's finally done! Introducing Valkyrie...

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Specs
83x96x25mm, 150g
NanoTwo with 30:1 500rpm motors for drive, 2x RacerStar BR1106 motors driven by 2x Emax Bullet 6A esc's for the weapon.
Construction the same as Vampire, 1.5mm carbon fibre, 1.6mm aluminium angle, and 0.75mm polycarbonate for the chassis and armour.
7075T6 aluminium weapon with M3 high tensile bolts for the teeth, 25g, 23mm rotational diameter, 32,000rpm!

After a fair bit of work it's on weight and the weapon is balanced. Much to my surprise it's really nice to drive with no gyro issues, and while the weapon is on the tame end for an antweight spinner, I've got pretty high hopes of this being competitive. Bring on Ant Freeze!
Team Zero
Zero - rambot - - Axiom - axebot - - Valkyrie - drum spinner
Vampire - horizontal spinner - - Orion - horizontal spinner walker

Derek Dudge
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Re: GeorgeR's robots

Post by Derek Dudge » Wed Jan 31, 2018 1:44 am

I just know I'm gonna finish my bot in time for Ant Freeze then I'm gonna draw one of your spinners in first round of matches then be collecting him with a dustpan and brush afterwards. Heh.

I wonder how well I'd fare getting hit by Valkyrie. Even if we don't get matched up, and if there's time once the competition is over, I might let you have a go, for science etc. It's hard to predict what kind of damage would occur having not fought with my robot before. I'm curious if it would just pull my front armour piece clean off.

Oh, and its gorgeous by the way. I showed my housemate (who is also a big fan of the robot shows) pictures of your ants to show what some folks on this forum are building. His response was - whoa.
My robots:

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

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GeorgeR
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Re: GeorgeR's robots

Post by GeorgeR » Wed Jan 31, 2018 1:27 pm

Cheers, but I wouldn't be so worried about my spinners when Shakey's bringing the likes of "Don't Hug Me I'm Scared", I was pretty unlucky drawing that beast in my first ever robot fight at last years ant freeze.

While I'm not really sure how powerful Valkyrie will be, and I've only seen Third Law in pics, I reckon you'd stand up pretty well. My guess is that I'd take some nibbles out of the polycarb, and maybe take the head off a bolt, but Third Law looks solid enough that any larger hits would flip or throw you rather than cause major damage. Either way I'm certainly up for "testing" if you are!
Team Zero
Zero - rambot - - Axiom - axebot - - Valkyrie - drum spinner
Vampire - horizontal spinner - - Orion - horizontal spinner walker

Kaazmin
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Re: GeorgeR's robots

Post by Kaazmin » Wed Jan 31, 2018 2:06 pm

ill be bringing some more cans if u wanna test in the arena ^-^ I have a new motor mount on error so hopefully ill be able to move past 30% power without knocking out my own spinner :P

voorsk
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Re: GeorgeR's robots

Post by voorsk » Thu Feb 01, 2018 11:03 am

That's stylish! Makes all the printer bots look.. well.. plasticky! :roll:

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GeorgeR
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Location: Bath, Somerset

Re: GeorgeR's robots

Post by GeorgeR » Mon Feb 05, 2018 9:38 pm

Well, Ant Freeze was both great fun and rather successful.

Valkyrie exceeded all expectations, it proved great to drive, and the weapon was surprisingly powerful. Winning its group, and picking up 6 victories on its way to 4th place overall was far more than I hoped for. Not that it was all smooth sailing, after about the third fight it became apparent that the weapon wasn't spinning as smoothly as it should be, and despite my best efforts on the day it deteriorated until it finally seized up just in time for its final fight (against Drumbldore!)

Zero proved decent once again, picking up three wins, but sadly didn't get to face any more spinners. Vampire continued its abysmal form, with 2 straight losses meaning it now has only one win in three events. At least it did take out Bad Idea in the horizontal spinner battle.

Now I better get back to finding out what went wrong with valkyries weapon so it doesn't happen again!
Team Zero
Zero - rambot - - Axiom - axebot - - Valkyrie - drum spinner
Vampire - horizontal spinner - - Orion - horizontal spinner walker

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GeorgeR
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Location: Bath, Somerset

Re: GeorgeR's robots

Post by GeorgeR » Fri Feb 09, 2018 12:11 am

Autopsy complete...

Image

Turns out the issues I had with Valkyries weapon were due to the motor bells detaching from the shaft and hitting the stator.
It appears there are a few reasons for this;
1) these motors are apparently known for being weak here (now you tell me!)
2) the weapon wasn't fully balanced (vibration!)
3) the ends of the weapon aren't perfectly square (more vibration!)

Issues 2 and 3 should be sorted by spending more time getting the weapon right, I was aware of both but as it seemed to be working ok prior to ant freeze i didn't bother fixing it, guess i shouldn't have been so lazy. For the motors i'll see what i can do to toughen them up, I think some loctite 638 should do it.
It's worked so well when it was working I really have to get it going again before next time!
Team Zero
Zero - rambot - - Axiom - axebot - - Valkyrie - drum spinner
Vampire - horizontal spinner - - Orion - horizontal spinner walker

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GeorgeR
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Location: Bath, Somerset

Re: GeorgeR's robots

Post by GeorgeR » Wed Mar 21, 2018 1:52 am

AWS 54 seemed to be the event where I finally picked up some damage on my bots, but despite having a fair bit of repair work to do it was good fun and pretty successful overall.

Zero continued it's solid record with another 4 wins, including a particularly bruising encounter with Don't Hug Me that gave the front scoop a bit of a battering...

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Following some work reprofiling the weapon Vampire picked up a couple of wins, which was good, but then decided to attack itself in the spinner rumble leaving it open to some gouges in the side...
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I had high hopes for Valkyrie, and it performed excellently in it's first fight. Unfortunately the second fight was against Combatant, and despite getting the victory it took a lot of big hits to the weapon and it's supports, meaning I had to finish the tournament with an improvised acetate wedge rather than the drum.

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Sorry for the rather picture heavy post, but everybody likes damage right?
Team Zero
Zero - rambot - - Axiom - axebot - - Valkyrie - drum spinner
Vampire - horizontal spinner - - Orion - horizontal spinner walker

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