TinyTwo Speed Controllers

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Rapidrory
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Re: TinyTwo Speed Controllers

Postby Rapidrory » Wed Jun 03, 2015 1:15 pm

Having finished exams, I can now get back up to speed with building ESCs, so if people need any before the next AWS, now it the time to buy them!

I also just sent off a load of new boards for printing in china with lots of robot controller parts. The main ones that may be of interest to the antweight community are Servo control boards, Nanoweight ESCs, and a limited number of ant ESCs with built in Gyros.

The servo boards just make any standard ESC and motor setup into a servo by attaching the board between the RX and the ESC, and sticking a potentiometer on the motor output. More designed for heavier weight classes as you can often just get away with hacking normal servo boards for ants, but this gives the option of running big 12v setups that normal servo boards would cry about (I'm aiming to use one in Skutter for example)..

The nanoweight ESCs are just miniature versions of the ant ESCs; 10mm x 8mm and substantially thinner. Although the board is rated up to 12v (and 1.5A per channel), it doesn't have a BEC so is only really aimed at 1s lipos.

I threw a couple of ant ESCs with gyros in for print as well; these are the size of a Lemon and are designed to fit neatly alongside. Planning to set it up so they automatically calibrate on start up so they'll work regardless of how they're thrown in the chassis. No idea if they'll actually work as I haven't tried doing the firmware yet, but there's hope yet :L

These are all in fairly limited numbers (40, 20, and 10 of respectively) as they're more for niche applications than wide use... They will be on sale at some point in the next few months when I've got the boards back and firmware written. Prices will be worked out nearer the time.
Rory Mangles - Team Mangler

Robots: Too Many...

NanoTwo antweight speed controllers. (viewtopic.php?f=1&t=2128)

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EpicentrE
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Re: TinyTwo Speed Controllers

Postby EpicentrE » Wed Jun 03, 2015 1:22 pm

The idea of a board with a gyro makes me giddy with glee. I look forward to seeing how these turn out.

Did you ever get any further with the idea of having a board with a pre-attached Deltang RX (rather than the lemon), or was it too much of a pain?
Scott Fyfe-Jamieson, Captain of Epic Robotics. Champion of AWS38/41/42.
http://www.epicrobotics.co.uk

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Rapidrory
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Re: TinyTwo Speed Controllers

Postby Rapidrory » Wed Jun 03, 2015 1:28 pm

Such a small number of people use deltangs these days (you're pretty much the only person who runs deltangs and/or 3s these days :L) that I hadn't bothered, although I could see if I can get the voltage regulation on the Nanoweight ECS solid enough to run the RX off it. As I say, the boards are rated to 12v so'd be right up your street :L
Rory Mangles - Team Mangler

Robots: Too Many...

NanoTwo antweight speed controllers. (viewtopic.php?f=1&t=2128)

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EpicentrE
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Re: TinyTwo Speed Controllers

Postby EpicentrE » Wed Jun 03, 2015 1:39 pm

I'm generally trying to move away from 3s unless it is specifically needed (new spring flipper is using a 12v servo, for example, so that needs it). As for Deltangs, they're still around a couple of grams lighter than OrangeRXs, which makes them worth it in my book, even if the soldering is a nightmare. I wouldn't expect you to develop something very few people would use anyway, I was just curious :).
Scott Fyfe-Jamieson, Captain of Epic Robotics. Champion of AWS38/41/42.
http://www.epicrobotics.co.uk

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Rapidrory
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Re: TinyTwo Speed Controllers

Postby Rapidrory » Wed Jun 03, 2015 1:41 pm

See, the lemon RX that nearly everyone uses these days are 0.8g, and at £3 each I never saw enough of a benefit in deltangs to make it worth the price :L
Rory Mangles - Team Mangler

Robots: Too Many...

NanoTwo antweight speed controllers. (viewtopic.php?f=1&t=2128)

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EpicentrE
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Re: TinyTwo Speed Controllers

Postby EpicentrE » Wed Jun 03, 2015 1:46 pm

Yes I was looking at Oranges not Lemons ignore me I'm stupid lalalalalala
Scott Fyfe-Jamieson, Captain of Epic Robotics. Champion of AWS38/41/42.
http://www.epicrobotics.co.uk

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Rapidrory
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Re: TinyTwo Speed Controllers

Postby Rapidrory » Wed Jun 03, 2015 1:47 pm

All my robots from my Nanos to my Heavy use Lemons.. Lemons are great :L
Rory Mangles - Team Mangler

Robots: Too Many...

NanoTwo antweight speed controllers. (viewtopic.php?f=1&t=2128)

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EpicentrE
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Re: TinyTwo Speed Controllers

Postby EpicentrE » Wed Jun 03, 2015 2:12 pm

Sorry to be a nuisance, but from where is it you buy the Lemons for £3?
Scott Fyfe-Jamieson, Captain of Epic Robotics. Champion of AWS38/41/42.
http://www.epicrobotics.co.uk

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Rapidrory
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Re: TinyTwo Speed Controllers

Postby Rapidrory » Wed Jun 03, 2015 2:31 pm

Well, £3.50... and then £2 postage... but still not bad... http://www.lemon-rx.com/shop/index.php? ... duct_id=95
And hmm I swear it used to say 0.8g... ok, so 1.4g then..
Rory Mangles - Team Mangler

Robots: Too Many...

NanoTwo antweight speed controllers. (viewtopic.php?f=1&t=2128)

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Remote-Controlled Dave
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Re: TinyTwo Speed Controllers

Postby Remote-Controlled Dave » Wed Jun 03, 2015 3:22 pm

Any reason you're moving away from 3S, Scott? Is it just size constraints? Having recently upgraded my batteries I'm wondering if I should've stuck with the originals :-/
Die Gracefully Robotics
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EpicentrE
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Re: TinyTwo Speed Controllers

Postby EpicentrE » Wed Jun 03, 2015 3:30 pm

I'm still a bit on the fence about it. 2s is easier; you don't need a voltage reg, you motors will run cooler, you'll consume less current, you need less weight/space for the batteries. And the extra power is usually wasted because it's almost impossible to stall a Pololu HP in an ant.

That said, This version of Void runs 3s on 30:1s on 18mm wheels, and I really enjoy driving it. To get that same speed on 2s I'd need to go up to 26mm wheels which is a lot larger and I generally like to make my wheels as small as possible, partly so they take up minimal space, but also so that the rearmost contact point on the robot is as far back as possible.

So yeah, I dunno ¯\_(ツ)_/¯.
Scott Fyfe-Jamieson, Captain of Epic Robotics. Champion of AWS38/41/42.
http://www.epicrobotics.co.uk

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Rapidrory
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Re: TinyTwo Speed Controllers

Postby Rapidrory » Wed Jun 03, 2015 3:55 pm

I used 3S in Skutter as the Beetle drive motor needs it, and it gives it a nice bit of extra speed to the drive. There are a few cases which can justify 3s (such as Void and Skutter), however almost all designs can be done with 2s if designed correctly. All my spinners are 2S, as 3S seems to just be too powerful most of the time (which is coming from the guy with Bad Idea :L )
Rory Mangles - Team Mangler

Robots: Too Many...

NanoTwo antweight speed controllers. (viewtopic.php?f=1&t=2128)

Occashokka
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Re: TinyTwo Speed Controllers

Postby Occashokka » Wed Jun 03, 2015 3:58 pm

Would you wan two 2s in a spinner(hopefully my next bot)or would one do
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Re: TinyTwo Speed Controllers

Postby joey_picus » Wed Jun 03, 2015 6:00 pm

I might be interested in a couple of the built-in gyro boards; however I might be the only person who doesn't use Lemons so I'm hoping they aren't required to be used?
Joey McConnell-Farber - Team Picus Telerobotics - http://picus.org.uk/ - @joey_picus
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Rapidrory
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Re: TinyTwo Speed Controllers

Postby Rapidrory » Wed Jun 03, 2015 6:08 pm

I'm likely to sell them with a lemon already attached as they are designed specifically to fit a Lemon. Theoretically could use something else, but wouldn't be ideal..
Rory Mangles - Team Mangler

Robots: Too Many...

NanoTwo antweight speed controllers. (viewtopic.php?f=1&t=2128)


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