RogueTwo Robots

[Dan-27]

Looks really good so far Jamie. Have you got any limit switches on it?

[RogueTwoRobots]

are you using a speed controller for the axe? if so, how are you applying full power instantly?

Yeah I'm using a Victor 883 on the weapon at the moment (will be changing to a TZ-85 when I move across to them). Just controlling it by throwing the transmitter stick to the left or right as quickly as my fingers will allow, so not completely instantaneous, but the difference is negligible. However in the 10 years I've had the transmitter, I've never once used its trainer switch (which is a spring return switch) so I'm planning on rewiring that onto the channel pot so that I can flick the switch to get instantaneous power yet still retain proportional control for retract and demos.

Cheers Dan, no limit switches fitted on it (they'd probably get destroyed) but I've found that just judging it by eye seems to be sufficient. Because the joystick and switch both spring back to the centre/off position, it's easily enough to let go when it's either hit something or reached its travel. Will be adding some rubber absorption/protection to the chassis at the travel limits though.

[sam_smith]

Hi Jamie, I like your new weapon videos.
Have you tried experimenting with a larger gear-ratio for the axe? I'm guessing the sprocket on the motor shaft already has the fewest teeth possible?

[RogueTwoRobots]

Cheers Sam, haven't played around with different sized axe sprockets yet. It did cross my mind when I first converted to the scooter motor but at the moment I'm happy with how it's running so will leave it for now. And yeah, the motor's currently got a 9-tooth sprocket on it which is the lowest I could go before running out of boss material!

Update

The battle for weight loss has been won! After drilling 140-odd holes, I managed to get Onyx down to 13.6kg:



The only problem is that my scales are only to one decimal place, so it could be anywhere between 13.61kg or 13.69kg. I thought about drilling more holes to be sure but then I realised that:

- I'll lose a bit of weight when I swap from Victors to TZ85s (might even put the XL from Carcinus back into Onyx as it'll be lighter)
- I can ditch the RX battery, mount and switch and use the BEC on the XL or TZ85 controlling the weapon
- I estimate the tether to weigh around 50-100g, and tethers aren't included in the weight (will actually weigh it to be sure)

So the combination of those three things should put it safely underweight; I'm also hoping there will be enough spare to afford some protection to the currently-quite-exposed scooter motor, but we'll see.

Also, it you ever wondered what 375g of HDPE swarf looks like, here you go:

[Gaseraki]

Great stuff. Love the desk covered in swarf. Think mine may look similar soon.
If your scales are rounding to the nerest tenth of a KG then wont it be between 13.55 - 13.64?

[RogueTwoRobots]

That's a good point actually, never thought of them rounding like that. Won't really know for sure until I get them on a more precise set of scales. The only event where that will be strongly enforced will be the Robo Challenge champs, but I'm hopeful of getting along to at least one RW/RL event before then so I might be able to check it out on their CO2 scales (if they go to two decimal points...)

[Porker]

When you fit the tether, please could you show me, so that I understand what exactly they are?

[RogueTwoRobots]

Yeah can do. It's already fitted but I will be taking it off and weighing it so will get some pictures when I reassemble it.

[Porker]

OK, thanks.

[adz600]

Don't use there co2 scales just guess will be more accurate 300gram difference on no toy from RL- Robochallange scales
that was alot

[RogueTwoRobots]

Update

Been doing a little work to Flatulence over the past couple of days. It's been sitting for about a year needing its armour completed and I've been putting it off for ages because I expected it to be fiddly and annoying to do.

I was right, but got it done eventually. It's quite thin, at 2mm, but seems reasonably strong. The bottom half is 4mm HDPE which will stand up to the spinners a bit better, but I'm fully expecting all of it to take a beating. At least it completes the look a bit more. Ignore the multiple fail-holes where the armour layers meet:







Currently weighs 1083g so got just under 500g for....stuff. The only thing I want to do is replace the ali flipper plate with a steel one with triangle wedges at the front to finish the shape off and offer some protection. Will also need to stick something on the top of the flipper plate to help it self-right as it only rolls halfway over before getting stuck.

I'll never expect this to be a serious contender as I started building it two years ago and since then, despite not even having an event yet, beetleweights have already stepped up a level. But if nothing else, it's good fun to play with

http://www.youtube.com/watch?v=bYRiReRymms

[harry hills]

Love it
what voltage you running the servo off?

[RogueTwoRobots]

Cheers Harry. The servo's just plugged into the receiver, which is getting a 6V, 5A feed from the BEC. Was originally using the BEC in one of the Botbitz ESCs but it was underpowered, especially since it's a beast of a servo. All good now though

[SamO]

Are you going to finish the BW Drumroll?

[RogueTwoRobots]

Probably at some point down the line, yeah. Not with that chassis though, would make a new one out of some thicker/more rigid material, and need to get a smaller diameter brushless as I planned to have the current one pressed into the drum tube, but I couldn't get a tube with a suitable ID so just plan to revert to a pulley transmission.