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Mechanics and Construction / [advertisement] NEW Channel Snap Mounts!
« Last post by ServoCity on August 14, 2014, 12:42:30 PM »
The Channel Snap Mount A provides a quick and simple way to attach various Actobotics parts to your structure. Simply snap the mount onto our aluminum channel as shown below - it’s that easy! Made from 1/8” thick Delrin, the mounts are both lightweight and very sturdy. By incorporating our 0.770” hole pattern they are extremely versatile and allow for a 1/2” flanged ball bearing to press fit into the center hole. The smaller mounting holes are 6-32 thru holes that offer countless mounting configurations. Sold in pairs.
http://www.servocity.com/html/channe...l#.U-z9GvldV7s



The 9V Battery Channel Snap Mount makes it easy to mount a standard 9V battery into our aluminum channel. Simply snap the mount into the channel as shown below and press-fit in your 9V battery. The mounts will securely hold the battery in place and provide a clean mounting solution - no more tape! Made from 1/8” thick Delrin, the mounts are both lightweight and very sturdy.
http://www.servocity.com/html/9v_bat...l#.U-z9wPldV7s


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Mechanics and Construction / Re: 3D printing parts for fun!
« Last post by Billy on August 14, 2014, 12:11:32 PM »
I virtually print something every day. I have CNC machines too, but there are some parts that make more sense to create on the 3D printers. It's changed the way I make stuff.

You keeping your version a secret?

Let's see a link.

Mine was a ton of work as all SW is 100% from scratch, both in the uC(ARM7) and the PC.
All axis's servo control (encoder feedback with PID @1kHz update) with brushed DC motors.
All electronics hand designed and built.
Mechanics machined and welded at home.
I did leverage previous work on 3D printers by using store bought hot-bed and nozzle (J-Head).

For total effort:
10% HW
10% Electronics
80% Software

If I had to do it again, I would certainly be smarter about it and use the stepper systems that have become common and a motion system like Mach3.
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Mechanics and Construction / Re: 3D printing parts for fun!
« Last post by Anoroc on August 14, 2014, 07:52:44 AM »
Looks like one heck of a substantial build!

I virtually print something every day. I have CNC machines too, but there are some parts that make more sense to create on the 3D printers. It's changed the way I make stuff.
44
Robot Videos / Re: Stable quadcopter scratch build using arduino nano
« Last post by jaosef on August 14, 2014, 01:46:52 AM »
Did another flight, now in Uppsala, Sweden
https://www.youtube.com/watch?v=6GZpYjeUk4M
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Misc / Just saying Hi from SC
« Last post by Andakwa on August 13, 2014, 10:28:33 PM »
Hello everyone, I fiddle with micro-controllers & electronics and just finished my first robot. It is made with Arduino Uno, Seeed Motor Shield v2, Ping Ultrasonic Sensor, PIR Motion Sensor & a Bluetooth Slave module.
I got the basic idea from a website and used a few of the same parts but wrote my own code.
He roams aimlessly, pausing to see if my dogs are following the continues on or turns on them if they are stalking him and I can turn him into an RC car via bluetooth.

Nice to meet you all.


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Mechanics and Construction / Re: 3D printing parts for fun!
« Last post by Billy on August 13, 2014, 05:31:41 PM »
If anyone is interested, shoot me a message. I can print with ABS, PLA, PETG and flexible filament.

That's cool you're willing to do this for people.
I made a 3D printer - printed two test pieces - and haven't touched it since.
Turns out that for me, building a 3D printer was the goal, not having one.
https://www.youtube.com/watch?v=SAGvzeQw2Oc
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Mechanics and Construction / 3D printing parts for fun!
« Last post by Anoroc on August 13, 2014, 12:21:39 PM »
Hi everyone. Since the beginning of the year, I've been developing a 3D printer. We're actually finished with the printer, but I want to start blogging about my experiences with the machine. If anyone has parts they want printed, I'd be happy to print them for free. All I ask is that I have permission to blog about the process and share images of the finished part.

If anyone is interested, shoot me a message. I can print with ABS, PLA, PETG and flexible filament. The available print size is 6 x 6 x 9, but parts can always be broken into pieces, if larger than the available print volume.

Thanks!!
48
Software / Re: using the iphone as an rc transmitter
« Last post by DiegoChavez on August 10, 2014, 11:13:51 PM »
could you elaborate a bit on that for me please?
49
Mechanics and Construction / Re: Short Legs+Paw/feet help needed
« Last post by WriterOfMinds on August 10, 2014, 08:04:51 PM »
You've asked a very non-specific question -- so, if the design is already done, perhaps you could share more details?  Any constraints you can provide will make it easier for people to help, without wasting time by suggesting things that won't actually work for you.

Again, it's a very non-specific question.  For each of the things you asked about, there may be tens if not hundreds of options, and the best one for you will depend on things like your budget, available tools, where you live (some things might be hard to purchase in your area), and other aspects of the design.  So I would also suggest that you do some broad research in each area and come back with more specific questions.

In the absence of good information about your design, I can tell you a few things about the walker I'm currently working on.  The legs are made out of PVC conduit.  It's fairly light-weight, it's cheap, it won't rot or corrode, and it resists breakage.  The only real downside I can think of is that it's easy to cut, but unless you are building Battlebots that probably doesn't matter.   The joint design is detailed here: http://writerofminds.blogspot.com/2014/01/build-better-hinge-joint.html  These joints are not exactly professional, so if you can find and afford ready-made precise joints, you might want to do that.

I also have some feet which I may or may not put on the robot, which are made out of ... um ... bottle caps, with sections of ball-point pens for toes.  No, really.  You can build your stuff out of almost anything, just be creative.

My walker's legs are driven by linear actuators, with cheap stepper motors at the back end.  If you want a hopping robot, though ... that's a whole different ball game.  You need a fast but powerful movement, every so often.  I'm picturing either a way of storing and rapidly releasing tension (spring, surgical tubing, etc.) with a motor and gearbox to wind it up, or a pneumatic system.
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Electronics / Re: using the iphone as an rc transmitter
« Last post by dbuhlbrown on August 10, 2014, 11:50:01 AM »
It would depend on what microcontroller or similar processor you are using. You may want to look into something called a Cellbot( http://www.cellbots.com ). I have done a couple research projects using them before and a lot of the techniques people use for making Cellbots could help you out a lot.

Personally I use an Android tablet and an Arduino using a bluetooth module, but I was not trying to transmit video then, only commands / sensor data. You could use 2 Android phones though. And that would require you to simply send the video feed from one phone to the second and then just control the robot with the "controller' phone you are using.
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