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Team RCC featherweights
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Nick
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Joined: 16 Jun 2004
Posts: 11799
Location: Sydney, NSW


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Looks good as new. Which bits are the bent Hardox?
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Australian 2015 Featherweight champion
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Post Mon Sep 18, 2017 8:12 am 
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maddox



Joined: 21 Dec 2006
Posts: 779
Location: Belgium


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The 2 blue front corners. Those got cut to ribbons by Caliope, and after that smeared out by daredevil.

One of the results of the massive hits was the "breaking" of the sealing between the hardmounted buffertank and main bottle.
The other annoying bit was the destruction of the flipperarm, acting as a crumple zone.

With the addition of the extra layer of HDPE and hardox, the flipperarm-box section has some sideways protection.

The buffertank is now even more hardmounted, and even acting as a stressed member of the frame. Unless the spine gets bend, the stresses on the connections should be in the limits of the sealant.

Post Mon Sep 18, 2017 8:40 am 
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maddox



Joined: 21 Dec 2006
Posts: 779
Location: Belgium


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Leo and me worked on Nebelwerfer last weekend, and it works.

Main difference with the previous versions is the size and weight of the disk. Smaller and a tad lighter.


Stats.

5Kg

Drive, Ranglebox Neptune mated to HK 2836 motors. Controllers, SimonK reflashed Afro 30A.
Weapon. TP3650 motor, 210mm diameter 1 kg hardox 500 disk. 2 stage gearing. First stage bevel gear 2.5-1, second stage timing belt with smooth pulley on the disk, 2-1 gearratio. Startup amps with tight belt, 85. Running amps 25A. Hobbyking SS190-200 ESC

Battery, Zippy Compact 3S 2700mAh

Frame, 60x10mm aluminium and 5mm HDPE
Armor, up to 30mm HDPE.



http://forum.roboteers.org/index.php?attachment/597-img-1486-jpg/

Post Mon Oct 02, 2017 4:35 pm 
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maddox



Joined: 21 Dec 2006
Posts: 779
Location: Belgium


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Last event :"FACTS" in Ghent wasn't good to Team RCC. Hannibalito wasn't happy, and did show it. First solid ali that did the job for 10 years Sheared off and new bolts lost their heads. After that de ESC went into safe mode, leaving us limping around as a dead, rheumatic snail. To finalise in a fight were weapon and drive failed in a distinct unspectacular way.

Perun, the one that always runs, lost the fuse, mechanicaly. And the fight after that, the link. To end up with 2 motor that replaced magnets with shards.

Kashei Besmertnye, the weapon stays a sore point. Needs a full rebuild.

Nebelwerfer 4 . A monster is born. 4mm grade 5 ti deforms undet the blows of the disk, the brushless drives are light, controlable and utterly powerfull. The disposable "ablative " hdpe armor took the worst blows. Untill the weaponmotor separated from the gearbox.
Some tweaking and 1 kg of improvements will show the true might of this Awakened One

Post Sat Oct 28, 2017 7:46 am 
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maddox



Joined: 21 Dec 2006
Posts: 779
Location: Belgium


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The day before FACTS, and at FACTS a German filmcrew had fun here and at the event.

The result...

https://macher.hornbach.de/die-projekte/heavy-metal-kampf-der-roboter/

Post Fri Nov 24, 2017 3:37 pm 
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Nick
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Joined: 16 Jun 2004
Posts: 11799
Location: Sydney, NSW


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Excellent video - I dodn't need Google translate to get the message Smile
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Australian 2015 Featherweight champion
UK 2016 Gladiator champion

Post Fri Nov 24, 2017 6:08 pm 
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maddox



Joined: 21 Dec 2006
Posts: 779
Location: Belgium


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We had anothern event. Utrecht was a repeat of FACTS.
Hannibalito 3 kept on being obnoxious, this time frying drives by the bucketload.
Probably sulking because Hannibalito 5 was trying to take the limelight.

Hannibalito5 , in sympathy and/or respect for the elder brother, fried the drive too....

Kashei, the weapon got some improvements, tested it to an inch of its life at home, seemed ok. First fight at the event, a gear that never failed, came lose... That is welded now. Next point of failure please.

Perun, charge battery, replace shredded wheels, ready. Untill the ESC failed mechanicaly.

Nebelwerfer 4... The show is on. This small monster is feared now in the Dutch/Belgian/German 6 kg class.

https://www.youtube.com/watch?v=B53A6DMY5RE&t=1s

And that's what prompted a small rebuild.
The aluminium/titanium sandwich frame is replaced with a full welded titanium frame. The disk went from 800 grams of destruction to more than 1 kg.

And we went to far in the idea of an undercutter. Went undergroundcutter.
https://www.youtube.com/watch?v=Nwj4igUeP2M

Post Sun Dec 24, 2017 3:27 am 
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Nick
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Joined: 16 Jun 2004
Posts: 11799
Location: Sydney, NSW


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What's wrong with the 'underground cutter'? The video looks fine to me although I am very biased towards undercutters.
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Post Sun Dec 24, 2017 8:28 am 
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maddox



Joined: 21 Dec 2006
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Location: Belgium


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The road didn't like the strikes. If that disks gets dug in the arena floor, it's pinball machine time.

Post Sun Dec 24, 2017 8:49 am 
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Nick
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Joined: 16 Jun 2004
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Location: Sydney, NSW


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Chewing up the floor won't make friends with the event organiser! What I find useful on Scissorhands is to have a range of spacers to fit on the front pivot point. which raises and lowers the blade. that is really effective in avoiding other horizontal weapons or attacking weak spots. It looks like you have enough ground clearance at the back to do the same thing
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Australian 2015 Featherweight champion
UK 2016 Gladiator champion

Post Sun Dec 24, 2017 9:21 am 
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maddox



Joined: 21 Dec 2006
Posts: 779
Location: Belgium


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Added 5 mm of armor on front to do so. Is enough to raise the disk to 3mm above the floor when braking.

Post Sun Dec 24, 2017 2:15 pm 
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maddox



Joined: 21 Dec 2006
Posts: 779
Location: Belgium


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Hannibalito 5 on Brushless.

https://www.youtube.com/watch?v=CMgJfWNSzPk

Post Sun Dec 24, 2017 8:26 pm 
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maddox



Joined: 21 Dec 2006
Posts: 779
Location: Belgium


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We ran in a power issue.
The Mod 0.75 Z9 pinions press fitted and Loctite 638 won't hold.

The gears are too small to be welded to shafts (I admit defeat here).
Anybody an idea ?

Post Thu Dec 28, 2017 6:10 pm 
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Knightrous
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Joined: 15 Jun 2004
Posts: 8492
Location: NSW


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I've peened the shaft with a pin punch, added loctite and then pressed the pinion on for a couple of difficult pinions that kept coming loose. Anything more stubborn then that either got brazed with silver solder or TIG'd.
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Post Fri Dec 29, 2017 12:22 am 
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Nick
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Joined: 16 Jun 2004
Posts: 11799
Location: Sydney, NSW


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My favourite solution for this sort of problem: buy some pinion wire and make your own pinion. Make it as long as possible and ream the bore under size. Also leave the teeth on the back of the pinion so the bore expands less as the pinion is pressed on the shaft.
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Australian 2015 Featherweight champion
UK 2016 Gladiator champion

Post Fri Dec 29, 2017 6:47 am 
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