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project UPDATES
01-02-2018, 11:37 AM (This post was last modified: 01-02-2018 11:39 AM by JJrobots JP.)
Post: #1
project UPDATES
Hi everyone.
You will find the projects updates here: https://www.jjrobots.com/robotic-arm-sca...t-updates/

Please feel free to comment everything you want about this robotic arm.
Would you like a extremely small gripper for the arm? Concerned about its size?
You have had bad experiences with other robotic arms? which ones?

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It is now or never! :-)
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01-30-2018, 06:39 PM (This post was last modified: 01-30-2018 06:42 PM by robdobsn.)
Post: #2
RE: project UPDATES
(01-02-2018 11:37 AM)JJrobots JP Wrote:  Hi everyone.
You will find the projects updates here: https://www.jjrobots.com/robotic-arm-sca...t-updates/

Please feel free to comment everything you want about this robotic arm.
Would you like a extremely small gripper for the arm? Concerned about its size?
You have had bad experiences with other robotic arms? which ones?

You can leave a comment in this sub-forum or just add it to the page indicated above using your facebook account.
It is now or never! :-)

Hi there, I wrote up a blog post http://robdobson.com/2018/01/not-so-droo...robot-arm/ about a SCARA I built a little while ago in case there is something there that might help you.
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01-31-2018, 12:26 PM
Post: #3
RE: project UPDATES
[/quote]

Hi there, I wrote up a blog post http://robdobson.com/2018/01/not-so-droo...robot-arm/ about a SCARA I built a little while ago in case there is something there that might help you.
[/quote]

Hi Rob,
Thank you for this.We will take a deep look at your post. It has a lot of useful info and ideas.

On our side: We are still testing the control board.

The ARMBOT frame is almost finished. The stability of the robot and accuracy/speed compromise has been the most time consuming thing to "solve". We have had to re-locate the motors more than 5 times redesigning the whole arm. Working with a fully extended arm (with load) shifted its center of gravity 6 cms making the Z axis very inaccurate (+- 5 mm). Now, without load the center of gravity is located between the motors (-11mm from the XY "origin") and with a load of 250 grams it moves to +15mm, not compromising balance or precision.

This is the current status of the robotic arm frame: [Image: Armbot-Vertical-and-horizontal-CLAMPs.png]

Would you like to collaborate once the control electronics are completely functional? We can send you a prototype version if you want.
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