T_Y's Build Log

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EddieJ
Posts: 50
Joined: Sun Apr 08, 2018 2:11 pm

Re: T_Y's Build Log

Post by EddieJ » Tue Jun 05, 2018 10:05 pm

Going to be a bot with style! Looking great so far :D
Bots:
DisinfectANT (Antweight), Cilit BANG (WIP Antweight)

T_Y
Posts: 56
Joined: Thu Mar 15, 2018 12:51 am
Location: York

Re: T_Y's Build Log

Post by T_Y » Tue Jun 05, 2018 11:11 pm

Thanks everyone! As I said earlier, I do want to re-cut the panels at some point, but for now the shell will suffice.

@paulmchurd
I picked up a Monoprice Maker Select Plus on Amazon for £290, it's amazing so far. I think it's just a rebrand of the Wanhao that you've got?

I have not had the chance to pop down to the hackspace yet. I might find time to go to one of their open nights in the next few weeks.

@MichaelG92
Good luck with exams!
Thomas
Hello, World! - Antweight front hinged flipper (retired)
Percussive Maintenance - Antweight 'axe'bot
Have You Tried Turning It Off and On Again? - Antweight 4-bar lifter
Blue Screen of Death (BSoD) - Antweight front hinged flipper (designing)

T_Y
Posts: 56
Joined: Thu Mar 15, 2018 12:51 am
Location: York

Re: T_Y's Build Log

Post by T_Y » Wed Jun 06, 2018 6:30 pm

Quick update, I've been doing some wiring and soldering today. The weapon ESC arrived, so now I have everything except some more motor mounts.

Looks like I was right, the current shell is too small, so it's back to the Sketchup model to get some extra space inside.
Thomas
Hello, World! - Antweight front hinged flipper (retired)
Percussive Maintenance - Antweight 'axe'bot
Have You Tried Turning It Off and On Again? - Antweight 4-bar lifter
Blue Screen of Death (BSoD) - Antweight front hinged flipper (designing)

Geoffreybath
Posts: 20
Joined: Sun Oct 01, 2017 1:51 pm

Re: T_Y's Build Log

Post by Geoffreybath » Wed Jun 06, 2018 7:50 pm

Very nice. :D

Paulmchurd
Posts: 191
Joined: Sun Dec 10, 2017 4:39 pm

Re: T_Y's Build Log

Post by Paulmchurd » Wed Jun 06, 2018 8:32 pm

T_Y wrote:
Wed Jun 06, 2018 6:30 pm
Quick update, I've been doing some wiring and soldering today. The weapon ESC arrived, so now I have everything except some more motor mounts.

Looks like I was right, the current shell is too small, so it's back to the Sketchup model to get some extra space inside.
I have lots of spare motor mounts. I live in Heworth if your local and want to come get some?

T_Y
Posts: 56
Joined: Thu Mar 15, 2018 12:51 am
Location: York

Re: T_Y's Build Log

Post by T_Y » Thu Jun 07, 2018 7:54 pm

@Paulmchurd
I'm a short cycle away, that would actually be quite handy, thanks. Want to discuss in PM?
Thomas
Hello, World! - Antweight front hinged flipper (retired)
Percussive Maintenance - Antweight 'axe'bot
Have You Tried Turning It Off and On Again? - Antweight 4-bar lifter
Blue Screen of Death (BSoD) - Antweight front hinged flipper (designing)

T_Y
Posts: 56
Joined: Thu Mar 15, 2018 12:51 am
Location: York

Re: T_Y's Build Log

Post by T_Y » Sat Jun 09, 2018 11:50 am

So for the past few days, every available surface in my room has looked like a robot vomited all over it, while I've been sorting out the wiring. I've cut a larger shell, gaining about 6mm height and 1.5cm in the tail, and I can juuuuuuust about fit everything in, aside from some wires that need shortening.

The long and short of it is that it's working (shoutout to Paulmchurd for the motor mounts)!

https://youtu.be/wMANM1Sqj-I

I still need to do some work on it, mainly trimming down the wires. I used a fair few Dupont and JST connectors so that I could hot-swap components if I needed to, but they take up a lot of room (hence the wires sticking out the back). I also need to shed a little bit of weight, which I can easily do by perforating the base panel, and add a back armour panel to protect the wires.

I was considering painting the armour, but I think I like the bare look of clear polycarb instead.
Thomas
Hello, World! - Antweight front hinged flipper (retired)
Percussive Maintenance - Antweight 'axe'bot
Have You Tried Turning It Off and On Again? - Antweight 4-bar lifter
Blue Screen of Death (BSoD) - Antweight front hinged flipper (designing)

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DieGracefullyRobotics
Posts: 152
Joined: Mon Apr 02, 2018 7:39 am

Re: T_Y's Build Log

Post by DieGracefullyRobotics » Sat Jun 09, 2018 12:00 pm

Paint can add a surprising amount of weight too, as I've learnt to my cost in the past!

It looks fantastic though, well done. Can't wait to see it do battle.
Dave
Die Gracefully Robotics - Barely Even a Proper Team.

Derek Dudge
Posts: 112
Joined: Thu Dec 07, 2017 9:32 pm

Re: T_Y's Build Log

Post by Derek Dudge » Sat Jun 09, 2018 2:11 pm

Ohhh I really hope Manticore draws Percussive Maintenance at AWS. Two 150g hammers trying to bash each other sounds hilarious to me.

Looks good!
My robots:

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

T_Y
Posts: 56
Joined: Thu Mar 15, 2018 12:51 am
Location: York

Re: T_Y's Build Log

Post by T_Y » Sat Jun 09, 2018 2:36 pm

@DieGracefullyRobotics
Oh yeah, it didn't occur to me that there would be a weight issue with paint.

@Derek Dudge
War of the axebots!
Thomas
Hello, World! - Antweight front hinged flipper (retired)
Percussive Maintenance - Antweight 'axe'bot
Have You Tried Turning It Off and On Again? - Antweight 4-bar lifter
Blue Screen of Death (BSoD) - Antweight front hinged flipper (designing)

AntRoboteer
Posts: 437
Joined: Mon Mar 03, 2014 7:01 pm

Re: T_Y's Build Log

Post by AntRoboteer » Sun Jun 10, 2018 5:21 pm

That looks really amazing; looking forward to seeing it! :D

T_Y
Posts: 56
Joined: Thu Mar 15, 2018 12:51 am
Location: York

Re: T_Y's Build Log

Post by T_Y » Mon Jun 11, 2018 5:41 pm

I've spent some time trying to slim down Percussive Maintenance to get it into the weight allowance. A tail armour panel was added to keep the wires in and the wiring has been tidied up somewhat so it fits inside the shell completely. It's a very tight fit though. I trimmed down some screws and perforated the base in an attempt to shed some weight, but I'm still a little bit over. It then occurred to me to swap out the 260mah battery for a 180mah battery instead which will sort out the weight problem. The 260mah battery is overkill, it only needs to last 3 minutes. The 180mah batteries are also a bit smaller, so it shouldn't be as tight inside. So there's some smaller batteries on the way.

I really like the look of Percussive Maintenance, so I decided to redesign Hello, World! to use a similar shaped shell, but reversed so the long end is the front, and widen the flat section in the middle to give a better flipping surface. The servo that I've got doesn't appear to have a great amount of actuation arc on its arm, so I've also redesigned the flipper system to a) use push rods for pivot points b) use a gear motor connected by interlocked 3D printed arms to get a better range of motion out of the flipper.

Image

Image

Currently printing off a prototype hinge system to see what needs adjusting to make the movement smooth.

I've also been looking for alternate speed controllers - running three quite bulky ESCs in one bot is quite limiting for internal space and weight. The RobotShop website lists some cheap speed controllers, even some dual channel ones. I'm a bit confused by the wiring needed for these ones though. (I believe they're designed for use with things like Raspberry Pis and Arduinos). Take this dual ESC for example. The AOuts and BOuts are for the motors, the VMotor is for input power direct from battery, but what about connections to the receiver?
Thomas
Hello, World! - Antweight front hinged flipper (retired)
Percussive Maintenance - Antweight 'axe'bot
Have You Tried Turning It Off and On Again? - Antweight 4-bar lifter
Blue Screen of Death (BSoD) - Antweight front hinged flipper (designing)

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peterwaller
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Location: Aylesbury Bucks
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Re: T_Y's Build Log

Post by peterwaller » Mon Jun 11, 2018 6:17 pm

You need to be careful most of those are just motor driver boards that will not work with the signals generated by a standard receiver.

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Shakey
Posts: 1047
Joined: Sat Mar 13, 2010 8:38 pm
Location: Reading

Re: T_Y's Build Log

Post by Shakey » Mon Jun 11, 2018 6:29 pm

Those driver boards don't have connections for the receiver. The reason those are 'cheap' is because they are simply a single component of a typical ESC, vitally missing is the micro controller which translated the receivers signals into signals that can be used to control those driver boards.
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!

T_Y
Posts: 56
Joined: Thu Mar 15, 2018 12:51 am
Location: York

Re: T_Y's Build Log

Post by T_Y » Mon Jun 11, 2018 6:48 pm

Ah okay, that explains the low cost.
Thomas
Hello, World! - Antweight front hinged flipper (retired)
Percussive Maintenance - Antweight 'axe'bot
Have You Tried Turning It Off and On Again? - Antweight 4-bar lifter
Blue Screen of Death (BSoD) - Antweight front hinged flipper (designing)

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