Great stuff. So 2x$135 and I'll finally get my t-shirts folded for me in the laundry room.
Hand: open-source Robot Hand
71–80 of 111 posts
Re: Hand: open-source Robot Hand
#72Earlier quoted context omitted.
...that's how it was in year 2020. What you're missing is: today, we're nearing the point where actual general purpose robots become viable. Which means: the purpose of a robot is no longer to sit at a factory line and precisely execute the same exact motions on repeat 24/7. The purpose of the next generation of robots is to learn generalized behaviors, adapt to circumstances, and carry out circumstance-specific acti…
Without repeatability, good luck tuning your robot to do anything reliable.
Real world isn't "reliable". If a robot can't correct for errors, it's not going to survive out there.
Re: Hand: open-source Robot Hand
#73What jumps out at me is the $135 bill of materials. What a time to be alive!
You haven’t accounted for the 3D printer yet.
Re: Hand: open-source Robot Hand
#74Here is what I’m more keen on, rather than the human-like robots that we are all expecting. For instance, I would like a wall-mounted or floor-standing multi-arm robot that serves as a kitchen assistant. One can add or reduce arms as needed/desired. It is custom-equipped with a fire extinguisher, thermometer, and the usual must-haves for a kitchen. It will hold the cutlery, plates, and other items as needed. It will…
perhaps sir would prefer… tentacles?
Re: Hand: open-source Robot Hand
#75Does anyone know what design considerations, if any, might've gone into deciding to have 4 fingers instead of 5? And what tradeoffs that entails?
I actually saw this posted a few days back on Twitter and had been wondering if there was any deeper consideration for the number of fingers. It seems like you save around $10 in parts by getting rid of a finger, based on the information in the BOM.
Re: Hand: open-source Robot Hand
#76What jumps out at me is the $135 bill of materials. What a time to be alive!
Feetech is selling actuators which are mechanically R/C type servos, but have a bidirectional computer interface allowing the control computer to find out what's happening at the servo.[1] This isn't new; Dynamixel has been doing it for over a decade. But not at this price point. This Feetech servo is $17, while Dynamixel units start around $70 and go much higher.[2] The parts list has "need to be strong" for many of…
Mold design is still difficult when the parts aren't dead simple. The software I've seen is okay with the simple stuff, but once you get even a little more complex you have to understand simultaneously how to design good parts for molding and how to design good molds, both of which are heavily dependent on the type of plastic you're using and the size of the press you have access to. Not to mention how to machine good molds from metal, which is a challenge all on its own due to surface finish and tolerance requirements (and weird geometry that makes the CAM choke...)
In other words, we're not really there yet to bring that activity into the hobby realm. But I hope that we're not too far away.
Re: Hand: open-source Robot Hand
#77Earlier quoted context omitted.
Most hand related jobs upwards of $100 per 30 min If this Robot hand can do those jobs we could see some industries take a hit
People have been making end effectors using hobby servos for ages. These servomotors are designed for use in an RC aircraft, they're light, cheap, and expendable. Industrial needs care not about weight, care less about cost, and care a great deal about capability, repeatability, and reliability. This is a cool project for a hobbyist but it's not meant to be a serious industrial machine. Edit: what is with this thread…
> Lots of very generic positive comments here but not much thinking about what this is actually useful for.
How can you say that when the person you are responding to is talking about what this is actually useful for?
Re: Hand: open-source Robot Hand
#78Earlier quoted context omitted.
Feetech is selling actuators which are mechanically R/C type servos, but have a bidirectional computer interface allowing the control computer to find out what's happening at the servo.[1] This isn't new; Dynamixel has been doing it for over a decade. But not at this price point. This Feetech servo is $17, while Dynamixel units start around $70 and go much higher.[2] The parts list has "need to be strong" for many of…
Mold design is still difficult when the parts aren't dead simple. The software I've seen is okay with the simple stuff, but once you get even a little more complex you have to understand simultaneously how to design good parts for molding and how to design good molds, both of which are heavily dependent on the type of plastic you're using and the size of the press you have access to. Not to mention how to machine goo…
They're little linkage parts, mostly flat.[1] Some of those holes are bearings. None of those parts are hard to make, but they need to be strong. They could be made by CNC machining, or in quantity by injection molding, or stamping. But tiny working parts in 3D printed PLA will be too flimsy for that hand to do much work.
Totally fixable problem. Then this hand can go to work.
If this thing catches on, someone might sell an upgrade kit with stronger parts. The designer is already considering a servo upgrade.
[1] https://github.com/pollen-robotics/AmazingHand/blob/main/ass...
Re: Hand: open-source Robot Hand
#79Earlier quoted context omitted.
Roboy used dyneema tendons if I recall correctly. Fluidic actuators is another option. IMO, additional sensors and sensor fusion are necessary but this will raise the costs and demand to control software significantly. We are researching humanoid robots for quite some decades now and these problems are easily underestimated (similarly to autonomous driving). I doubt we'll see them in our houses very soon.
The issue is not that these problems are easily underestimated, but that the researchers are very proficient at repeating the same mistakes over and over again.
Or both …
Re: Hand: open-source Robot Hand
#80What jumps out at me is the $135 bill of materials. What a time to be alive!
Most hand related jobs upwards of $100 per 30 min If this Robot hand can do those jobs we could see some industries take a hit
It took me a a distressingly long time to understand this comment. I'm kind of concerned, and have vowed to get out more.