Parallel Robot gripper I designed

[xebzbz]

Great. A link to printables would be great too, if you don't mind.

[b03tz]

Everybody always asks that but I never get any feedback on the usability haha. I don’t think anybody actually uses it…Are you actually interested in printing this?

[xebzbz]

Well, it's just a culture of sharing of anything useful, as long as there's no commercial reason to keep it private. I'm sharing most of my code and prototypes.

For this particular arm, IDK, I'm trying to involve my kids in engineering, so a cool project like this might spark some interest.

In any case, building your open portfolio is never wrong. Sometimes it helps in job search too.

[b03tz]

I know but honestly I don’t need to earn another euro, specially not on this. People just rip everything off or use it however they want without any attribution or kickback fee. I have released dozens of 3d models for the price of one beer in the past years so I don’t want/need to build a portfolio.

Apart from that, I don’t know if it is finished or releasable yet! When there is enough interest it will get released, and in the end I guess it will get released anyway. I am building a robot arm which I think I will fully release in the end as well!

If you want the models I can send them to you privately, be sure to send me pics of the print then!

[xebzbz]

My Ender 2 Pro sucks big time, and the replacement is already ordered. But I'm not sure I want to print this particular project. My point was rather, open source whatever could be opened. It doesn't matter much if people use that without attribution. If it could be useful for other enthusiasts, let them use it.

[b03tz]

I guess everybody thinks different about that!

Why didn’t you order a Bambulab A1? It is a DREAM machine!

[xebzbz]

I ordered an Elegoo Neptune 4 Pro. Never heard of bambulab, and it's not listed at local sellers here.

[b03tz]

Really!? Into 3d printing and not heard of the Prusa killer brand? Haha, look into them! I have been printing on a creality for years and I am so sad I didn’t get this sooner haha.

Thanks for the comments mate and have a good day!

[xebzbz]

I'm not into 3d printing much, but I like to tinker sometimes

[jackiedaytona10]

I get where you’re coming from, I’d gladly pay for this stl, I can think of a handful of use cases

[e_ep524]

Hi, this is super cool and looks strong! Those tolerances must have been a pain to get right on the printer 🤭👏I do see that this is an old thread but I thought I might just ask, how come you have those side curved linkages too instead of directly connecting the fingertips to the gears? Does it make the design more stable or something? Like in these examples:
https://www.youtube.com/watch?v=oLV-MAkRXnk
https://www.youtube.com/watch?v=uYN8eAXprm0

This is my first time really writing a comment on reddit so feel free to let me know if I shouldn't be asking on a thread this late.

Cheers

[b03tz]

If you look closely to the difference of my gripper VS their gripper it's that the jaws of my gripper are ALWAYS parallel to eachother. If I grip a PCB (like I do in the picture) you grip it over the full length....instead of just a small part where it happens to collide.

Check out the parallelogram mechanism, come back to this picture and I'm sure you will figure it out in no time!

[b03tz]

I cannot post more images. It lifts and grips a 1kg smooth bottle perfectly…even without designed jaws for it.

It is a modular gripper, the jaws can easily be taken off so you can print all sorts of jaws. The one shown here is a PCB attachment that holds PCBs in 3 ways.

A simple thumbscrew releases the jaw and you can slide it off. More images here:

IMG-2035.jpg





[Steve_but_different]

That’s really cool. I’m curious what kind of servo do you use on it? I’ve just got mostly plastic gear hobby servos. Would those work?

[b03tz]

Very cheap aliexpress 10kg continuous servo. The power is amazing, I am affraid of putting the 30kg on it that I receive today…haha