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Author Topic: uArmⅠ:An open source robot arm  (Read 26083 times)
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Aaaaaaand started at last


* Johannesburg-20140126-00259.jpg (324.71 KB, 1600x1200 - viewed 69 times.)
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Is it foggy there?

Nope, you're in the foggy bit.

But I just looked at the camera lens on my phone and it's filthy, sorry.
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New pic after cleaning camera lens...


* Johannesburg-20140126-00262.jpg (76.4 KB, 800x600 - viewed 67 times.)
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Dubuque, Iowa, USA
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You blew an hour and all you managed to do is get your lens clean? C'mon man you're keeping us in suspense here  smiley-grin
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Seattle, WA USA
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You blew an hour and all you managed to do is get your lens clean?
Got to make progress where you can.
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Sorry guys, I'll up the pace....

.. next weekend...
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Ok, a teeeny bit of progress. Watch the base here, just to-ing and fro-ing with servo sweep.

Forgive me for powering the servo from the Uno 5V.... I do know better, as most of youse know.
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Phoenix, Arizona USA
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Ok, a teeeny bit of progress. Watch the base here, just to-ing and fro-ing with servo sweep.

Pretty smooth - great to see progress!

I have yet to do anything on mine, though I am pretty sure I have the acrylic to build it, after I checked my junk pile.

Forgive me for powering the servo from the Uno 5V.... I do know better, as most of youse know.

You will surely go to heck for that! smiley-grin
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For now I'm just going to use the cheap hobby servos I have- plastic mechanicals and 4.3kg cm of torque iirc- and I suspect it won't be so smooth under load.  But I will probably replace them with something of better quality and higher torque- say 10-  for the long run.

If I hadn't already bought them I'd replace the brass standoffs with nylon or similar- they're very heavy. In fact for simplicity I'd go for plastic tubes to act as looooong washers and screws all the way through with nuts on the other end.

It took me a while to figure out how to capture the big bearing.... trial and error brought me to the conclusion that not all the pieces have the same inside diameter, and I'm assuming this was by design. So two pieces with the (very) slightly inside diameter go above the bearing, two other pieces snuggly slide over the outside of the bearing, and the other pieces go below, again slightly smaller i/d. That leaves the bearing kind of "sandwiched" in place. Not 100% convinced I have it right though, but as in the video, it does actually work.

I'd also investigate the supply of thicker smaller bearings. If they come as 4x8x5 rather than 4x8x3 for not much extra cost, I'd go for those since they will then be the exact thickness of the material they sit in. OTOH, if there's little load, I'd actually look for nylon bushing of 8mm o/d and 4mm i/d. 8mm nylon rod cut to 5mm slices and 4mm hole in the middle would do, if not available off the shelf.

All good fun though. Not in a race, so just enjoying the tinkering....

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Alamos, Sonora, Mexico
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This would make a fine foundation for a small Boom Crane. Replace the Gripper/Suction axis with a Hook and Line. The Parallel Arms would perform the Boom/Jib functions. Replace the end with a TIp sleeve and run a line to the Base, where the Winch would be installed. Rotating Base is nice. It's far more flexible than required, but nevertheless a great starting point for a design. My intended purpose requires about 10meters of line that could lift 200grams partially extended.

You guys are modest and haven't plugged your kickstarter campaign in this thread (if you did, I missed it). But, honestly so many will be using your design and code, so it's a good idea to let other hobbyist know how they might support your efforts.  (If linking ot kickstarter campaigns is forbidden, my apologies).
https://www.kickstarter.com/projects/ufactory/uarm-put-a-miniature-industrial-robot-arm-on-your?ref=live .

Nice work gentlemen.
« Last Edit: February 03, 2014, 04:24:18 pm by ODwyerPW » Logged

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Alamos, Sonora, Mexico
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Gentlemen,
I signed up to receive one of your full kits with the gripper and suction options via sponsorship of your KickStarter campaign.
Looking forward to seeing continued development.

Again, really nice work. 1st class presentation of your product/project. Would love to get our students at Espanglish Institute / Guaymas Workshop developing products of that caliber.  Wow!
Peter


« Last Edit: February 08, 2014, 12:02:35 am by ODwyerPW » Logged

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Looks like another video on the arm.

https://www.youtube.com/watch?v=gKKWUZeyAac
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Im like very well the robot,but im look if is impossible have the draw,im look the picture and i have redraw all parts,remove the parts if im not like and add other modify for cut the parts with my laser cut...
where is possible download the arduino file for run this robot ??
thanks and best regards


* uarm 001.jpg (68.64 KB, 500x373 - viewed 30 times.)

* uarm 002.jpg (70.03 KB, 500x373 - viewed 33 times.)

* uarm 003.jpg (71.96 KB, 500x373 - viewed 44 times.)
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where is possible download the arduino file for run this robot ??

It is claimed to be "open source" but I have not seen the arm structure plans actually published anywhere. The arm itself appears to be a Chinese design, so not sure where the plans would be found.
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im think same !!
im write more message with the ufficial mail,but all reply write at May on web site ,but im look only one web store...
this Uarm is open source or not ???
if is open source where are the draw and all other file for arduino ??
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