[TriEmbed] Robotic Arm

Rodney Radford ncgadgetry at gmail.com
Mon Feb 8 16:12:09 CST 2016


Sorry for two messages back to back... but the USB controller just allows
pushing the buttons to move each joint, there is no feedback on any of the
joints.

So you can tell it to move clockwise or counterclockwise on each motor, but
you cannot tell it to move to 85 degrees, or to move to a specific spot in
3D space.  To do that would require adding feedback at each motor, and
without seeing the arm up close, i am not sure how difficult a task that
would be (is there room for a sensor on each joint?).

Feedback will be needed to handle the task Brian mentioned of stacking
blocks...

On Mon, Feb 8, 2016 at 5:04 PM, Rodney Radford <ncgadgetry at gmail.com> wrote:

> Yes, the arm is $51.51 from Walmart, but then you need to buy the USB
> extension kit as a separate item and it is about $33.90 (also at Walmart).
>
> Still cheaper, but by the time you buy both the total is $85.41.
>
>
>
> On Mon, Feb 8, 2016 at 4:24 PM, Pete Soper via TriEmbed <
> triembed at triembed.org> wrote:
>
>> (quick search)
>>
>> It appears you can get the arm described in the article below from the
>> Walmart web site for around fifty dollars:
>>
>>
>> http://www.instructables.com/id/Raspberry-Pi-and-Wiimote-controlled-Robot-Arm/
>>
>> -Pete
>>
>> On 02/08/2016 03:51 PM, Grawburg via TriEmbed wrote:
>>
>>> Won't get to the meeting tonight so I'm asking my question here.
>>>
>>> I'm looking for a robotic arm that's a bit more robust the the Maplin
>>> kits I've seen on line. Of course, it will need to be
>>> connected to a Raspberry Pi and programmable with Python.  I'm looking
>>> for something that can be programmed to pick
>>> up small blocks and stack them to make a something like a square. It
>>> should be in the $75-$100 range...I will probably
>>> end of using 4 for the summer class.
>>>
>>> So far I only find Maplins or units that are too expensive.
>>>
>>> Any suggestions?
>>>
>>>
>>> Thanks,
>>> Brian Grawburg
>>>
>>>
>>>
>>
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>
>
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