Ant Attempt 2 - 'Tough Justice'

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Rocketeer13
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Ant Attempt 2 - 'Tough Justice'

Post by Rocketeer13 » Mon May 14, 2018 12:42 pm

Hello again everyone!

So sadly I ultimately gave up on my first attempt to build a bot, Kosmos, mostly due to servo and design issues. I'll definitely return to the concept at some point! So, while working around revision, I've been planning my next build, and trying to work around all the issues I had before. This mostly means being motor driven, and screwed together, rather than hot glued - both servos and glue caused me no end of frustration!

The result is, in essence, Foxic 1, (4 bar lifter and 4 wheel drive) though I was unaware of that bot when I first came up with the design! I'll be reusing my Hobbyking T6A Tx and Rx, 4.8V 120mAh Nimh battery pack, and my Kingmax servo, as well as purchasing a Dasmikro (I don't think a nanotwo will be compatible with my Tx), and 4 N20 gearmotors. Then I'll vary the thickness of the polycarb based on what weight I've got left.

Here's a preliminary paint sketch of the bot design and weapon system, based on my plans so far. Once I have the components, I'll make a more detailed plan, with measurements etc, to get it as compact as possible, but I thought I'd post my initial ideas here first to get some thoughts/advice/feedback. I'm hoping to start properly in July, once I'm free from College, and try and be finished by AWS 56, whenever that gets scheduled for.
Tough Justice Blank.png
Tough Justice - yes, that name was partially inspired by a Scrapheap Challenge team!
Tough Justice Blank.png (12.94 KiB) Viewed 813 times
Robots:
Kosmos - Front hinged flipper (Temporarily Shelved)
Tough Justice - Four Bar Lifter (Under Construction)

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DieGracefullyRobotics
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Re: Ant Attempt 2 - 'Tough Justice'

Post by DieGracefullyRobotics » Mon May 14, 2018 1:13 pm

Woof Justice, per chance? Ha.

AWS56 is already scheduled for October 13th to give you the exact time to work to.

Good luck with it.
Dave
Die Gracefully Robotics - Barely Even a Proper Team.

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Rocketeer13
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Re: Ant Attempt 2 - 'Tough Justice'

Post by Rocketeer13 » Mon May 14, 2018 9:20 pm

DieGracefullyRobotics wrote:
Mon May 14, 2018 1:13 pm
Woof Justice, per chance? Ha.
AWS56 is already scheduled for October 13th to give you the exact time to work to.
Good luck with it.
Thanks Dave! Haha! Correct! I do miss that show.
Ah, thanks for that. I aim to be done well before then! I've just ordered my Dasmikro. Hopefully any overheating problems from the previous batch have been solved now. I'll post another update once I've got the parts and assembled a CAD or cardboard model. Then it'll be a bit easier to see what's what. Hopefully, I'll see you in October!
Robots:
Kosmos - Front hinged flipper (Temporarily Shelved)
Tough Justice - Four Bar Lifter (Under Construction)

Zanbots
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Re: Ant Attempt 2 - 'Tough Justice'

Post by Zanbots » Wed May 16, 2018 9:08 am

Awesome. My robot 24601. Is a 4 bar lifter.
I went 2wd as my bad choice of components didn't size up well.

I belive the standard rx from hobbyking is a bit big. The 4CH FS2A from banggood is cheap lightweight and tiny. 24601 has way more space inside now. It works with AFHDS. I believe that's hobbyking stuff too.
Jeremy Hall
Ants; 24601
Oh, Baby!
B-Bot

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Rocketeer13
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Re: Ant Attempt 2 - 'Tough Justice'

Post by Rocketeer13 » Fri Jun 08, 2018 8:48 am

Zanbots wrote:
Wed May 16, 2018 9:08 am
Awesome. My robot 24601. Is a 4 bar lifter.
I went 2wd as my bad choice of components didn't size up well.

I belive the standard rx from hobbyking is a bit big. The 4CH FS2A from banggood is cheap lightweight and tiny. 24601 has way more space inside now. It works with AFHDS. I believe that's hobbyking stuff too.
24601, huh? Since my bot is getting a bit of a police theme, perhaps I should rename it Javert for a fight? We could have a friendly grudge match!

Thanks for that! If I'm pushing the weight limit at all I might look into it, but I've removed the case from my Rx so I think I'll be fine for now.
Robots:
Kosmos - Front hinged flipper (Temporarily Shelved)
Tough Justice - Four Bar Lifter (Under Construction)

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Rocketeer13
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Re: Ant Attempt 2 - 'Tough Justice'

Post by Rocketeer13 » Fri Jun 08, 2018 9:06 am

Hello again!
Since the last update, I've had most of my components delivered, and the CAD (Cardboard Aided Design) process is well underway. Once I get a bit further, I'll post a few more updates.
I wanted to double check the wiring on my Dasmikro. It all looks fine (I think) but I'm a little unsure on which resistors to use (if any). They all seem to have the same markings, but the original Dasmikro thread memtioned different ones for different braking levels. Bear in mind that this is a 4WD design so the motors will be connected in parallel. Also, there's only 4 connection points where the rx wires go, so am I right in saying I only need to keep the white wire on one of those cables? Thanks in advance!
IMG_20180608_091704446_3.jpg
IMG_20180608_091704446_3.jpg (188.22 KiB) Viewed 586 times
Robots:
Kosmos - Front hinged flipper (Temporarily Shelved)
Tough Justice - Four Bar Lifter (Under Construction)

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BeligerAnt
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Re: Ant Attempt 2 - 'Tough Justice'

Post by BeligerAnt » Fri Jun 08, 2018 7:22 pm

It looks like you have all the bits in the right places and yes, you do only need to connect the white (signal) wire on one of the servo leads.
Make sure you plug the servo leads into the receiver the right way round. Usually the black (0V) wires go towards the edge of the board and the white (signal) wire towards the circuit.

Those "resistors" look like capacitors to me. Like these: http://uk.farnell.com/avx/aa105c104k4r/ ... dp/2057124
Small wire-ended resistors are are almost always stripey, those look plain and too short & fat for resistors.
If they are capacitors they probably want to go right across the motor terminals to help suppress any electrical noise generated by the motor brushes.
If they actually are resistors, don't connect them across the motors!
Gary, Team BeligerAnt

Ant Ipodean
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Re: Ant Attempt 2 - 'Tough Justice'

Post by Ant Ipodean » Sat Jun 09, 2018 5:40 am

Yes, those are capacitors that come with the DasMikro, in the picture.
The N20 motors don't really seem to need them.
You will have to acquire the resistors separately if you want to use them for braking.

Mike.

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Rocketeer13
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Re: Ant Attempt 2 - 'Tough Justice'

Post by Rocketeer13 » Sat Jun 09, 2018 11:21 am

BeligerAnt wrote:
Fri Jun 08, 2018 7:22 pm
Those "resistors" look like capacitors to me.
If they are capacitors they probably want to go right across the motor terminals to help suppress any electrical noise generated by the motor brushes.
If they actually are resistors, don't connect them across the motors!
Ant Ipodean wrote:
Sat Jun 09, 2018 5:40 am
Yes, those are capacitors that come with the DasMikro, in the picture.
The N20 motors don't really seem to need them.
You will have to acquire the resistors separately if you want to use them for braking.
Ah! I get it now! Brilliant. Thank you, both. That makes everything a lot clearer. Sounds like I'll just have to experiment a little with the capacitors, and perhaps some resistors, then.
Robots:
Kosmos - Front hinged flipper (Temporarily Shelved)
Tough Justice - Four Bar Lifter (Under Construction)

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Rocketeer13
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Re: Ant Attempt 2 - 'Tough Justice'

Post by Rocketeer13 » Sun Jun 10, 2018 3:27 pm

So I started on my Dasmikro today, and had a few issues. The power didn't seem to be getting through to the rx, despite all of the wires seeming to be in the right place, and not touching one another. Nevertheless I tried to unsolder one wire that looked like it could be touching, and the whole pad came away from the board, still attached to the cable (see bottom left of image). Has this happened to anyone else? Can it be fixed? Please help! :-?

Oliver
IMG_20180610_161758213.jpg
IMG_20180610_161758213.jpg (126.51 KiB) Viewed 445 times
Robots:
Kosmos - Front hinged flipper (Temporarily Shelved)
Tough Justice - Four Bar Lifter (Under Construction)

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GeorgeR
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Re: Ant Attempt 2 - 'Tough Justice'

Post by GeorgeR » Sun Jun 10, 2018 5:24 pm

I had this happen to one of mine, sadly its a case of low price = low quality. While I did get mine working again this convinced me that the dasmikro was nowhere near robust enough for combat, and I chucked the repaired one and gave away my unused one. I would recommend looking at other esc options. (the NanoTwo is fantastic)

If you do want to have a go at repairing it the way to get it working is to follow the traces on the board to find out what that pad was connected to, then solder the wire directly to the component pad. It is very fiddly, requires a very steady hand, and is not really worth trying unless you're confident in your soldering ability. For future reference I've seen other people cover the dasmikro in glue once they get it working to stop the pads falling off like this.
Team Zero
Zero - rambot - - Axiom - axebot - - Valkyrie - drum spinner
Vampire - horizontal spinner - - Orion - horizontal spinner walker (coming soon)

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Rocketeer13
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Re: Ant Attempt 2 - 'Tough Justice'

Post by Rocketeer13 » Sun Jun 10, 2018 5:52 pm

GeorgeR wrote:
Sun Jun 10, 2018 5:24 pm
I had this happen to one of mine, sadly its a case of low price = low quality. While I did get mine working again this convinced me that the dasmikro was nowhere near robust enough for combat, and I chucked the repaired one and gave away my unused one. I would recommend looking at other esc options. (the NanoTwo is fantastic)

If you do want to have a go at repairing it the way to get it working is to follow the traces on the board to find out what that pad was connected to, then solder the wire directly to the component pad. It is very fiddly, requires a very steady hand, and is not really worth trying unless you're confident in your soldering ability. For future reference I've seen other people cover the dasmikro in glue once they get it working to stop the pads falling off like this.
Thanks for the quick response! :) Sadly I don't think the NanoTwo is compatible with my Hobby king TX, as it doesn't run any form of DSM (That I'm aware of). And aside from some cheap eBay models, I'm not aware of much else on the market? I've been doing some research of my own, and that method does seem to be the most common solution. If that's the only way to save it, then it's got to be tried. Could anyone tell me where that loose wire has got to go? It doesn't seem immediately clear exactly where the traces lead?
Robots:
Kosmos - Front hinged flipper (Temporarily Shelved)
Tough Justice - Four Bar Lifter (Under Construction)

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peterwaller
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Re: Ant Attempt 2 - 'Tough Justice'

Post by peterwaller » Sun Jun 10, 2018 6:33 pm

If you look carefully at the pad that has come off you will see it has a small hole through it.
This was a plated through hole that connected to the other side of the board.
If you look at the picture below the red arrow shows the track on the other side where the connection goes.
This is the 5v out from the regulator which goes to the pin shown with the blue arrow which is where you should connect it.
Image
Hope this helps.

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GeorgeR
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Re: Ant Attempt 2 - 'Tough Justice'

Post by GeorgeR » Sun Jun 10, 2018 6:51 pm

Looks like you got lucky, that 5v regulator is a decent size to solder to so you should be able to get a reasonably robust connection. I lost one of the signal tabs and had to tack onto the tiny resistor next to those tabs, which was less than ideal.
Team Zero
Zero - rambot - - Axiom - axebot - - Valkyrie - drum spinner
Vampire - horizontal spinner - - Orion - horizontal spinner walker (coming soon)

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Rocketeer13
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Re: Ant Attempt 2 - 'Tough Justice'

Post by Rocketeer13 » Sun Jun 10, 2018 8:33 pm

peterwaller wrote:
Sun Jun 10, 2018 6:33 pm
If you look carefully at the pad that has come off you will see it has a small hole through it.
This was a plated through hole that connected to the other side of the board.
If you look at the picture below the red arrow shows the track on the other side where the connection goes.
This is the 5v out from the regulator which goes to the pin shown with the blue arrow which is where you should connect it.
Hope this helps.
Thank you so much! That really helps! While I was trying to sort this, I had the same problem with the pad next to it (the black wire), so I've since put spots of hot glue on all the other connections to try and give them a bit more strength. Can I reconnect the black wire elsewhere too? I'm guessing it's going to be in a similar place, but if it's possible to fix, I want to make sure I get it right.
Robots:
Kosmos - Front hinged flipper (Temporarily Shelved)
Tough Justice - Four Bar Lifter (Under Construction)

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