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Mechanics and Construction / Re: Actuators too small to simulate human arm?
« Last post by Michael7S on June 20, 2017, 10:10:24 AM »
For now I've used a spring assist for the first 2/3 of the travel.  The last third is pure drop.  This approximates the human propulsion, though a light spring for 100% of the travel might be a touch better.

If I do go to actuated propulsion (and lift), the specs will be much clearer.

Thanks for your help so far.


Electronics / Re: Wireless boat for college competition
« Last post by actuonix on June 20, 2017, 09:32:34 AM »
I'd be interested in seeing this project. Do you have a link?
Software / Re: Android robot control app
« Last post by actuonix on June 20, 2017, 09:30:03 AM »
Mechanics and Construction / Re: Actuators too small to simulate human arm?
« Last post by actuonix on June 20, 2017, 09:24:18 AM »
Did you get this sorted out? I agree with the above comment. Pneumatic is probably the way to go
For Sale / Re: I need a list of the cheapest parts for my first robot
« Last post by actuonix on June 20, 2017, 09:20:05 AM »
What type of robot do you want to build?
Electronics / Re: I fried my Sabertooth 2x12A
« Last post by Tommy on June 20, 2017, 08:16:57 AM »
2 200w wheelchair motors
Kisses, all the wheelchair motors I'v used with Sabertooth drives are over 400W.
             I'v had very good results with the 2x60 drive with these motors.

             if you power up the Sabertooth drive without removing or supplying power to
             the electric brake the motor could draw +40 amps.

Misc / Roby d'Bear on Kickstarter
« Last post by Robotic-Drive on June 16, 2017, 12:44:05 PM »

We have been working on our project for quite some time and now it's finally live. It's completely new robotic toy controlled via app on your phone or tablet. It's a robot which repeats after user in the form of an attractive bear. Suitable for both genders of all ages. The robot can be also used for learning songs, words etc.
Robot is powered by servo motors and a controller. All the brains of the robot are neatly packaged in our own app for mobile devices. Active Bluetooth connection enables complete control of the robot.
If you are interested, check it out here https://www.kickstarter.com/projects/558941584/roby-dbear or here http://www.robotic-drive.com/

Feel free to ask about it.
Misc / Re: Looking for Quality High School Robotics Experiences
« Last post by Selroth on June 16, 2017, 11:24:29 AM »
Well, the whole debate of what to include in our schools is a huge one.  But, from what I've seen, a lot of the higher-quality schools do still fit what you seem to be looking for. 

Have you looked into what events and such FIRST Robotics is doing in your area?  I don't know for sure, but I imagine many of the robots I'm seeing entered in the competitions are designed/built during school hours.  https://www.firstinspires.org/

There are many other STEM-related (and thus robotics-related) programs all over the world!  Some are more local, some are international.  But, you generally find out about the others in your area by going to one of them first.

Another thing you can look for are makerspace, sometimes called "hackerspaces".  In fact, there's a good map of known makerspaces on https://wiki.hackerspaces.org/List_of_Hacker_Spaces .  Be sure to look at the actual list too, because there's literally too many hackerspaces to be pinned on the map!  Chances are good you'll find one nearby, and that's an EXCELLENT source of information!
Misc / Hello! Not really looking for anything, but a community!
« Last post by Selroth on June 16, 2017, 10:59:35 AM »
Looks like I signed up monthsyears ago (wow - nearly 7 years?!), but have never made a post.  Well, I sure as heck don't remember why I originally signed up, but I just searched through my email for "FIRST Robotics" as I'm trying to become an active volunteer for them again, but this website came up.  Isn't it funny when you search for something, and find an unexpected answer to something that's been bothering you?

Anyway, I'm Brian (though I guess my nickname here is Selroth), and I have experience with something I call "heavy robotics".  Think "heavy equipment" like construction vehicles, bulldozers and excavators, and now think of those things being under remote control.  Cool, huh?  I thought so too!  But, life has pulled me in a supposedly "better" direction, but... I miss my robots.  I feel like I've somehow worked myself out of my passion, and every moment I'm not in the field I fall behind twice as much.  So, rather than being involved professionally, I thought I would be more involved personally, as in, in my free time (or what little I have of it).  Hence why I was looking to volunteer again at FIRST events in my community, and thus the email search that brought me here.

And why not be here?  I love SMF (this forum software) - it's like a "classic" to me and I still use it on an online community of my own!  I love talking about robots and stuff, and want to do it more!  I'm so behind, and so incompetent in many fields I find so very interesting, and maybe by some stroke of luck I'll have some answers for others!  So, I'm going to turn on all the notifications/subscriptions I can, and try to be involved a bit more in THIS community, as well as my local makerspace and FIRST. 

Admin/Anyone "on staff": could you get in touch with me too?  I'd like to discuss getting a Discord chatroom going for you guys, as I think that'd be a major hit for a community like this!  That AJAX chatroom put me back in the 90s, and while I loved it there, I don't think it's attractive to our younger audience :)  (not to mention this SMF-default horrid captcha - good thing I know to always CTRL-C my post before submitting!)
Misc / Tech Tip - Secret Life of Servos
« Last post by ServoCity on June 13, 2017, 08:15:40 AM »
Excited to launch our new Tech Tip video series - The Secret Life of Servos! Be sure to subscribe to our YouTube channel to catch our newest releases. Stay tuned . . .

The Secret Life of Servos - What is a Servo?
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