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Topic: uArm??An open source robot arm (Read 37637 times) previous topic - next topic

JimboZA

Aaaaaaand started at last
"Could you do the egg bacon spam and sausage without the spam then? "

No PMs for help please.
DO NOT power servos from Arduino 5V: give them their own power and connect the grounds.

JimboZA


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.
"Could you do the egg bacon spam and sausage without the spam then? "

No PMs for help please.
DO NOT power servos from Arduino 5V: give them their own power and connect the grounds.

JimboZA

New pic after cleaning camera lens...
"Could you do the egg bacon spam and sausage without the spam then? "

No PMs for help please.
DO NOT power servos from Arduino 5V: give them their own power and connect the grounds.

Chagrin

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  :D

PaulS

Quote
You blew an hour and all you managed to do is get your lens clean?

Got to make progress where you can.

JimboZA

Sorry guys, I'll up the pace....

.. next weekend...
"Could you do the egg bacon spam and sausage without the spam then? "

No PMs for help please.
DO NOT power servos from Arduino 5V: give them their own power and connect the grounds.

JimboZA

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.
"Could you do the egg bacon spam and sausage without the spam then? "

No PMs for help please.
DO NOT power servos from Arduino 5V: give them their own power and connect the grounds.

cr0sh


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! :D
I will not respond to Arduino help PM's from random forum users; if you have such a question, start a new topic thread.

JimboZA

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....

"Could you do the egg bacon spam and sausage without the spam then? "

No PMs for help please.
DO NOT power servos from Arduino 5V: give them their own power and connect the grounds.

ODwyerPW

#69
Feb 03, 2014, 09:28 pm Last Edit: Feb 03, 2014, 10:24 pm by ODwyerPW Reason: 1
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.
Quiero una vida simple en Mexico...nada mas.

ODwyerPW

#70
Feb 08, 2014, 05:08 am Last Edit: Feb 08, 2014, 06:02 am by ODwyerPW Reason: 1
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


Quiero una vida simple en Mexico...nada mas.

zoomkat

Looks like another video on the arm.

https://www.youtube.com/watch?v=gKKWUZeyAac
Google forum search: Use Google Advanced Search and use Http://forum.arduino.cc/index in the "site or domain:" box.

teocreo

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

zoomkat

Quote
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.
Google forum search: Use Google Advanced Search and use Http://forum.arduino.cc/index in the "site or domain:" box.

teocreo

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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