Cicatrix Build Diary

[RogueTwoRobots]

Re: Cicatrix Build Diary

I had that thread in mind when making my last post, but even though I replied in it, I couldn't remember where to find it (not that I looked much).
That solution seems pretty robust. Alternatives would probably involve some sort of machined custom hub that was drilled and pinned through the shaft, with the wheel then being fixed to the hub.

[ewan]

Re: Cicatrix Build Diary

Hi Tony, I've got some 12mm bore hubs that might be just what you need, they won't be going on the website for a couple more weeks but I'll add two to your order free of charge for dispatch tomorrow.

[RogueTwoRobots]

Re: Cicatrix Build Diary

Seeing as I'll be meeting him at the weekend and could pick stuff up, feel free to add an 18V GLA-S 100mm stroke actuator to his order free of charge too Ewan

[Ellis]

Re: Cicatrix Build Diary

Hey whilst you're at it Ewan I'm looking to get my hands on two actuators of that kind too so if by any chance you happened to throw those into the deal also free of charge that would be really really good.

Thanks Ewan you're the best!

[ewan]

Re: Cicatrix Build Diary

Nice try guys!

[Anttazz]

Re: Cicatrix Build Diary

You're a gentleman Ewan, thats awesome Any chance you could post/PM, if you're keeping them under wraps, me some dimensions of them so I can get some appropriate wheels ordered ready for my build week in a few weeks time?

[Anttazz]

Re: Cicatrix Build Diary

Spend the day working out a plan for 2 weeks time. Hoping to attend Barnsley with some Feathers and also have an event in March with Scot-Bots so i've a week plus the odd day to get them going for those.

Only a small amount of work needed for Rover and Jr.

Rover: Not really too suitable for the Scot-Bot events with the bang-bang speed control style the way it is and the batteries were from a drill so didn't last too long. After about 90s-2mins it would go into a death spin and be totally uncontrollable. So i've a set of ESC's, either 85A BotBitz ones or an XXL to put in there and change the batteries from 16.8v and roughly 100mAh to 14.4v 3700mAh.

Eric Jr: Have changed from 3700mAh 14.4v to 3700mAh 12v, pretty much because I have a lot of 12v batteries and not a lot of 14.4v and Rover needed a bit more speed to make it interesting. Also easier for Rover to drive around for longer more safely. Also needs some sort of electrical gremlin sorting out whereby each contact with anything makes the robot die, but there is still power and the robot works when the link is removed and replaced. I'm just going to tighten each connection and hope that helps. Any other suggestions?

Cicatrix: WIll maybe get the lifters set up that I have...maybe.

And then to Eric Jr2 which gets a post of its own....

[Anttazz]

Re: Cicatrix Build Diary

Eric Jr2:

Drive: 2 x 24v Gimson GR02's
ESC: XXL or BotBitz 85A (will test both, depending on my judgement of their performance)
Battery: 24v 3700mAh NiMH
Weapon: FP Pneumatic flipper
Radio: Spektrum DX5e with either Spektrum or Orange rx

Have ordered a load of parts that'll hopefully be here for a build day. Will debut at Barnsley if all goes well.

So far:

[Revsmin]

Re: Cicatrix Build Diary

Nice that you got hold of old Rip Evo, always was a good robot. Personally I would recommend the BotBitz ESCs over the XXL, they seem to be preferred by many people.
Can't wait to see how it turns out, Tony!

[Max]

Re: Cicatrix Build Diary

The problem could be the link itself ? I have used a tamiya connector as a link before and if the robot jolted it cut out.

[Anttazz]

Re: Cicatrix Build Diary

I run an XXL in Cicatrix and its so smooth compared to the BotBitz ESC's in the kits even though its not an official XXL. Albeit they're the 25A versions of the BotBitz but we'll see what happens. I've ordered a set of both anyway, as one will get used in Rover. Voltage wise I may be pushing the BotBitz ones a bit high at 24v nominal too.

[Anttazz]

Re: Cicatrix Build Diary

Good call Max, i'll give it a try tomorrow although I have a feeling I already tried that. Can't hurt to do so again

[PJ-27]

Re: Cicatrix Build Diary

The BotBitz are rated to 6S which when fully charged are 25.2V so should be fine. If they get hot consider some additional cooling.

[Anttazz]

Gadget Show Report

Not a bad event really, Cicatrix qualified for the top 18 and Usain Bot missed qualifying by 1 point. Always good to catch up with the robot crew as time/money don't let us attend too often. Cicatrix will still be competing at Scot-Bots event and events that I don't have anything else ready for but really its a solid machine, no repairs made all weekend, but really want to compete with robots with a weapon in future.

Slight bit of damage on the front of Cicatrix' scoop from Binky:





Hopefully i'll have Eric Jr2 running for Edinburgh and get a chance to run it properly, not even too sure if I want a FP flipper as it'll only come out on special occasions but will try it at Edinburgh and go from there. Will get a bottle for it over the next few weeks and make sure I can fit the shell on then it'll be a matter of waiting for June for a test.

[ady]

What armour is that scoop?