Kosmos Build Diary

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AntRoboteer
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Re: Kosmos Build Diary

Postby AntRoboteer » Sun Oct 08, 2017 12:50 pm

Futaba connectors are black 3 pronged connectors which are identical to your servo connectors in every way except one: there's a piece of plastic on top of the connector which acts as a key so that you cannot plug in the battery the wrong way. Of course, this only helps if you are plugging into Futaba style connectors. If the connectors you are plugging into are Hitec/JR then these sockets do not tend to have clearance for the ridge and the connector will not fit.

However, the Futaba ridge is very useful to prevent damaging the batteries and hence I would recommend going for the Futaba connector versions of the batteries but removing the receiver case to allow the Futaba ridge to fit.

Hitec/JR connectors are indeed identical to your servo connectors in every way and will fit in sockets designed for Futaba but note that you will be missing the key which prevents the battery being entered the wrong way.

JST is a two pin connector and hence you can plug it in the wrong way more easily. It can technically fit into connectors designed for both Hitec/JR and Futaba. However, I'm not sure I would recommend going for JST right now because if you plug the battery into the receiver the wrong way, the receiver is going to be dead immediately in most cases.

Overall, my recommendation is to go for the Futaba variant and take the case off of the receiver to fit the ridge.

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Rhys
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Re: Kosmos Build Diary

Postby Rhys » Sun Oct 08, 2017 6:44 pm

A flipper called Kosmos? Well this is awkward... :P
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Rocketeer13
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Re: Kosmos Build Diary

Postby Rocketeer13 » Sun Oct 08, 2017 8:18 pm

Rhys wrote:A flipper called Kosmos? Well this is awkward... :P

:lol: Luckily it's a different spelling? As I said, mine's named after the rocket, rather than 'the cosmos' so I think we can get away with it! :P

AntRoboteer wrote:Overall, my recommendation is to go for the Futaba variant and take the case off of the receiver to fit the ridge.

Thanks! I just wanted to check to make sure I got exactly what I needed! I'll order that. Look forward for another update soon, once it arrives!! :)
Robots:
Kosmos - Front hinged flipper
There's more to come, believe me!

'There's no point being grown up if you can't be childish sometimes!' - The Doctor

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Rhys
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Re: Kosmos Build Diary

Postby Rhys » Mon Oct 09, 2017 10:17 pm

To be fair, I think the chances of me making it to an event any time in the next decade are slim... But if I do, we could always have a grudge match for the naming rights. :wink:
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Rocketeer13
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Re: Kosmos Build Diary

Postby Rocketeer13 » Sat Oct 21, 2017 2:52 pm

Rhys wrote:To be fair, I think the chances of me making it to an event any time in the next decade are slim... But if I do, we could always have a grudge match for the naming rights. :wink:


Challenge accepted! 8)
Robots:
Kosmos - Front hinged flipper
There's more to come, believe me!

'There's no point being grown up if you can't be childish sometimes!' - The Doctor

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Rocketeer13
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Location: Devon

Re: Kosmos Build Diary

Postby Rocketeer13 » Sat Oct 21, 2017 3:18 pm

I think another update was due a week ago, but I keep telling myself that 'I'll just do a bit more before I post!' so it's just got delayed! :lol:

Anyway, on the bodywork side of things, it's largely finished, with the only modifications needed being a polycarb support for my weapon servo, which I'm ordering soon. The fins on the lid will be added only if I have enough weight, and I haven't attached the front panel yet to allow me access to set up the weapon, and drill holes in the chassis if necessary. But I'm very pleased with how it looks, and how sturdy it is!

On the electronics side of things, I've now got both the rechargeable battery, and the charger. I've also pinpointed my electronics issue as being a faulty reciever, so hobbyking should be sending me a new one within the week. When I get paid again, on Tuesday, I'll order the weapon servo, and hopefully everything should start coming together! :D

It currently weighs around 134 grams, so I may just get away without having to do any weight saving, but I'm certainly not far off finishing! I'm not sure yet as to whether I'll be able to make the next AWS, as it depends very much on if my dad can take me - unfortunately, public transport from Devon to Southampton is more tricky than it should be - and the next Ant Freeze may be difficult too. Hopefully Greenwich will become a regular venue though, as that's a little more simple!
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Robots:
Kosmos - Front hinged flipper
There's more to come, believe me!

'There's no point being grown up if you can't be childish sometimes!' - The Doctor

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Rocketeer13
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Re: Kosmos Build Diary

Postby Rocketeer13 » Sat Oct 21, 2017 3:19 pm

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i
Robots:
Kosmos - Front hinged flipper
There's more to come, believe me!

'There's no point being grown up if you can't be childish sometimes!' - The Doctor

AntRoboteer
Posts: 372
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Re: Kosmos Build Diary

Postby AntRoboteer » Sat Oct 21, 2017 3:43 pm

Wow, that looks really nice. Hope you're able to come to the AWS; I'd love to see it running. :D

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Rocketeer13
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Re: Kosmos Build Diary

Postby Rocketeer13 » Sun Nov 12, 2017 4:43 pm

So sadly I wasn't able to make the AWS, which is a shame, as I could well have been ready!
Anyway, here's what I've been up to:
Firstly, my receiver woes are over, as the replacement came, and worked beautifully! I now have my weapon servo, linked below, and I've fitted it in the robot, using a paperclip as the arm. I'm pleased with the weapon's power, as I can also self right, but I'm not sure how sturdy that paperclip will be - I guess I'll just have to try it out a bit more!
https://www.componentshop.co.uk/13g-met ... -6-0v.html

So, as a result, the front panel has been attached, and I've added a switch to the battery, meaning it now complies with all the rules. The charging time on this seems to be about an hour, according to the web. I did also attempt to speed mod the servos, but the micro screwdriver I've got couldn't find a purchase on some of the screws. On top of that, the smallest of my dad's watch making screwdrivers is missing, so I can't even use that. But they do seem to be fairly nippy anyway, and probably fast enough for combat, but slow enough for me to get to grips with the controls. I'll edit together a video when I get the time to demonstrate.

It currently weighs in at 144 grams, and I have a few things left I can do. Firstly, I need to get a programming cable for the transmitter, as at the moment the flipper only moves 90° by twisting a knob. Easily fixed, but needs to be done. Second might be the fins from the original design, that would definitely help protect the switch from being knocked in a fight. I also have the option of shortening the servo cables to take up less weight and space, but it's really whether or not I can be bothered to do that! Lastly is getting some double sided tape to attach the acetate. However, the main body of the robot is already 4 inches by 4 inches, so doing this would mean that the acetate actually pokes out beyond that, something I hadn't foreseen! How much of an issue is this? Any suggestions?

But thanks again for all the help and encouragement. My younger brother is having a go at it too, now, so I'll upload some photos of his project at some point! But making this has been great fun - I think I might be hooked on the hobby! :D
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Robots:
Kosmos - Front hinged flipper
There's more to come, believe me!

'There's no point being grown up if you can't be childish sometimes!' - The Doctor

Geoffreybath
Posts: 15
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Re: Kosmos Build Diary

Postby Geoffreybath » Tue Nov 14, 2017 7:50 pm

Looks good for your first time build. Any ideas for next robot project :D

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BeligerAnt
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Re: Kosmos Build Diary

Postby BeligerAnt » Tue Nov 14, 2017 8:38 pm

The robot only needs to fit in a 4 inch cube, it isn't limited to a 4 x 4 base. By fitting the robot diagonally in the cube it can be a lot longer than 4", but any acetate does need to fit in the cube. Bits poking out are not allowed! :)
Gary, Team BeligerAnt

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Rocketeer13
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Re: Kosmos Build Diary

Postby Rocketeer13 » Thu Nov 16, 2017 10:41 am

BeligerAnt wrote:The robot only needs to fit in a 4 inch cube, it isn't limited to a 4 x 4 base. By fitting the robot diagonally in the cube it can be a lot longer than 4", but any acetate does need to fit in the cube. Bits poking out are not allowed! :)

Got it. Well, those are the rules! I've completely disassembled the front, trimmed it down, and fitted it back again. It's a bit steeper, so it's not ideal, but it works!

As for future projects? I have several ideas. There will probably be a rebuilt version of Kosmos first, as now it's all together, I can see some room to make it smaller, and refine the design. There may also be a Mute style rebuild at some point. Currently though, my favorite of my new designs is a grabber bot that I think is fairly original. It may also have an interchangeable flipper arm too! 'Starbug' is the top name at the moment, if it's not already taken (looks like there's a nanoweight called Star Bug on antlog), obviously named after a particular sci-fi ship, but also kind of appropriate, as I thought the grabbing arms look a lot like antenna. It's still in the design phase, but I'd be interested to hear your thoughts!
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Robots:
Kosmos - Front hinged flipper
There's more to come, believe me!

'There's no point being grown up if you can't be childish sometimes!' - The Doctor

Occashokka
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Re: Kosmos Build Diary

Postby Occashokka » Sat Nov 18, 2017 12:36 pm

it looks really cool with the front end maybe make your hooks with thin nails or similar just set to point backwards a little for a 'bite' , i like the name starbug provided its not used too much do you know whos it is?
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Has a 3d printer now yay
-£4.82+VAT (intact)
-cool modulated printed thingy
-not yet built nasty mean spinnt thingy

I'm gonna build something huge and stupid, try and stop me :P

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Rocketeer13
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Re: Kosmos Build Diary

Postby Rocketeer13 » Sat Nov 18, 2017 5:09 pm

Occashokka wrote:it looks really cool with the front end maybe make your hooks with thin nails or similar just set to point backwards a little for a 'bite' , i like the name starbug provided its not used too much do you know whos it is?

Thanks! :) Good idea! It looks like the nano Star Bug (as well as Red Dwarf) belong to team RobotMad, builder of the smart ants, and are not currently active, so I think the name is free. Nails are a brilliant idea for the hooks: It might be possible to use them as the arms, as they'd be far sturdier than thin polycarb. I'll set up a separate build diary for my ants once I start, so all my projects are in the same place.

As for Kosmos, it needs a quick charge and a test, then it'll be finished! I'll upload a test video soon! :D
Robots:
Kosmos - Front hinged flipper
There's more to come, believe me!

'There's no point being grown up if you can't be childish sometimes!' - The Doctor

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Lincoln
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Location: Olney, Milton keynes

Re: Kosmos Build Diary

Postby Lincoln » Sat Nov 18, 2017 5:57 pm

i'd prefer if you avoid using the name starbug as i have plans for a new nano that may use the name.
the name actually came from the first nano being red dwarf for obvious reasons (it was red and slow and seemed size appropriate)
so its twin nano was named star bug.
sorry to be a bit of a kill joy but im sure you can come up with a new name. (says the guy who's robots are just numbered most the time)
Team RobotMad, home of the Smart robots, and very mean pots :)
Chris and Lincoln Barnes


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