It's Impressive, But NOT For The Reason You Think.
ฝัง
- เผยแพร่เมื่อ 30 ก.ย. 2021
- My review of MyCobot Pi robot arm from Elephant Robotics company.
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#robotarm #robotics #robot - วิทยาศาสตร์และเทคโนโลยี
that was a great way to show the deviation. These reviews are top notch.
hey skyentific, congratulaitons!! seems to be servomotors that are used in the actuators?
Thank you for your content. Do you maybe ever want to make a video on inverse kinematics? It would really be appreciated, as i can't find a lot of clear videos on it, and it would really help getting into robotic arms.
The gripper you made the other day with a single servo was amazing.
I've been wanting to make a 'generic' 3 finger hand for a while.
Hello, do you think it is possible to replace the servos with more precise ones and powerful ones to reduce backlash?
The initiative is good but the product itself is half baked. A cheap stepper with a cheap encoder would have been far better. Good efforts by the developers tho.
yes, especially on the first 2 joints, where joint weight isn't important, would have made a huge difference.
A cheap steppers even without encoders would be better
Steppers are usually too heavy for that style arm. They do have their "pro" series arms which they claim to have brushless motors in the joints, but the price skyrockets.
Yes, geared stepper motors will be able to move more precisely, handle greater load and run much quiter than the servo motors. Though skipping steps would still be a problem.
@@TechBuild Closed loop steppers would be the cheapest option to mitigate missed steps
As is, if it was about 200-250$ it would be a good way to get into inverse kinematics
Agree!!!
What does the specification say about the workload it can carry? I have a feeling the weakest link i.e. the longest link will break down if it holds even a lighter weight
I am trying to choose some bldc motors for a robotic arm project but some of the motors that i want to use are not hall sensored. Do you think using a bldc motor without a hall sensor on a robot arm will cause problems when powering up?
Solid review with good examples.
Price is way to steep indeed.
$700 is a lot of money but are there better alternatives? When I look at the kind of servo's you use in other robots these servo's alone are way more expensive. So far I haven't seen an affordable 6 DOF robot under $1000.
Nice airplane chart you got there. Thanks for the review!
Hello, Sky, can you suggest me some resources to learn how to design robotic arms? I'm studying Electronics Engineering, I know the basics of mechanics (Statics and Dynamics). I've been searching for a book or some papers about mechanical design, but I feel clueless.
Thanks a lot for the great content!
Thanks for the great review! Do you think the MyCobot would be able to do precise/fast camera movements while holding a light camera or cell phone camera? I'm looking for something to do drag and drop recording of camera movements and play back so that I can film myself.
No, it wouldn't even be able to lift the phone.
would you use C# to control this arm ? would it be good to use since thats my background ?
You have two of them, you should teach them to sword-fight!
naw man mount one on each shoulder
I buy it for the cable management. Good cable management is a underated art
trolling is a art
Glad to hear that!
if i could build a durable arm that looked like this with the good cable management, i would be happy
@4:21 there is a noticeable sag of joint #4 with payload compared to the one without.
Well, I should have waited until the next segment with overlayed videos. Nice job! 🙂
I really want a robot arm to experiment with -- was looking at mycobot but after watching this, maybe that's not the play. Are there any arms you recommend which cost less than $1000?
Great review!
Just want to confirm, can I operate this robot arm without the computer? For example the program installed inside the robot arm and trigger the robot arm to work by a push button?
Very good & impartial review. Well done
You just save my money, very pratical review,
especially the repeatablity overlay, so clear to see it.
I am glad to hear that it was helpful!
What about adding an accelerometer to correct for the deviation?
I mean, not necessarily on this, but as a general engineering question- sort of accounting for flex that motor encoders can't see?
I got a lot of value from your honesty. Thank you 🙏
I get the impression that the designers were young, and have no idea of how a real industrial robot arm works.
As a result they built a plastic toy that uses none of the engineering principles that make an industrial robot strong, accurate, repeatable, and useful.
A properly engineered metal robot arm that size, with (say) +/- 0.1mm repeatability would be a really useful product, for which £5K to £10K would be a reasonable price range.
Young and ritch in order to pay at least 10 plastic injection molds and send 1400$ in robot arms to a channel that doesn't make a positive review for them...
@@eduardoanonimo3031 1400 USD is msrp, not the actual cost of hardware and assembly. Total cost of this robot, especially when they use high quantity (1.000-100.000) injection molded parts would be around 200-250 i guess.
@@mariusb6035 Exactly!
I get the impression that young or not the designers are, whoever made it thought : Man why do we need to use expensive motors when we can just use cheap servos? They all just spin right?
@@giantbee9763 And then backlash comes and repeatability get out of the party...
Thank you Skyenfific for pasting on the knowledge to the people. ⭐🙏⭐
I recently found this channel and I've been binging the whole thing! I'm a robotics student so this material is a great practical educational aid. However, I can't find your name anywhere. I only know you as Skyentific. I would like to know your name
É possível construir um braço robótico com Nema 23, usando deep learning com open CV?
for unknown reason, when I saw this arm, i remember that little French robot that's capable of dancing on your desk couple years ago. that little thing compare with this "you know where" product, it's like riding on a time machine.…
Thanks for review. I have one too. Nice thing. I love this toy. My version is based on ESP32. And can be programmed in a lot of ways, but I prefer Python too.
Please review MechArm. I appreciate how well you elaborate every aspect that I was curious about for this product and I curious your take on the mecharm.
Thanks the video. As a bit of feedback, the way you pronounce "command" makes it sound like "comment". First I thought I was missing some robot jargon, but at the end of the video I understood what I was supposed to hear. ❤️
what kind of servos does it use? can they be replaced with higher quality ones? I am heading back to college in the fall and i am taking robotics. I want to get a decent arm for my lab but i cannot afford a FANUC arm like we would have in class.
Build my robot arm (from my coming video). It is going to be cheap, and uses steppers. Video will be published next week (normally).
It would be difficult to replace servos, because they use special servos, with special communication protocol. So if you replace servos, you would need to replace electronics and software. Thus it would be easier to build the robot arm from zero.
Do you think those servos are in a CANBUS or something?
Thx for sharing
Very cool looking, wish the servos were a bit higher quality
Thank you for saying that. We definitely see the higher expectation on the servo performance and the self-innovated servo for this very small size in now under developing for that purpose and we are looking forward to introduce it to our users soon.
Very good review. Thanks.
so all the motors are canbus servos?
Serial error between pi and controller? no checksums on the data?
Most probably. :)
super useful review
I think it would be great if you could design something similar, cheap, 3d printed, with rpi too.
The thing is, if it is the same price, the quality would be the same. Precision comes from quality motors, bearings, transmission and all other mechanical parts. BTW, there are good open-siurce printed 3d designs, but they are more expensive. There also are designs based on rc servos, which are basically toys.
a little bit too expensive for the materials they put in . it's a little bit weird that they have different plastic parts ( different sizes for arms joins ) . It would make more sense to have segment 2 and 3 identical and 1 and 4 same . Cutting down production costs :) . I wonder how the servos are attached and what bearing they uses. What kind of servos are those ?
screws could shake loose in shipping?
No, I checked the package multiple times. This is self taping screws, and from look of the hole, we can definitely say, that no screw was there. :)
Good review
Cool thing!
first video after a very long time
They probably spent most of their money in the plastic molds. Quite a difficult concept to pull off on that scale.
I suppose this robot is made for makers, rather than industrial levels. i will buy one for my ROS project though.
nice, that it's really cool
Robotics teacher here 👋 I have both this MyCobot Pi and MyCobot Core + accessories (paid myself) and actually suggested to Elephant Robotics to send it to you. Good that they did. ‼️ But note that the code running on the M5Stack ATOM (in the head) is NOT OPEN SOURCE, this wonky python module is the only way to send commands. MyCobot is supposed to be for robot education but it is not possible to run ROS2, Moevit or anything else you would want to use for robots education. Since you can’t write your own interface for the Atom interface, you can also not teach robotics protocols for which there needs to be a proper OPC QA / MQTT interface. had my fair share of trouble with elephant robotics
Had my fair share of trouble with elephant robotics
- the raspberry PI comes completely in Chinese incl. the test program, most programs not working
- the documentation is incomplete / out of date
- claiming everywhere its an open source robot arm for makers and educators but they aren’t. I wanted to fix the atom interface and therefore the code and they replied for “company secrets reasons” lol they wont do that. They likely don’t want to see how some juniors jammed some code together. Which explains why you have trouble with the python code.
- The first robot they send me was 3d printed, still charged full price.
- This company loves false advertisement. From load, to speed, to repeatability to components used and marketing with open source while its absolutely not.
So buyers beware. If you want to see more about the issues, go into the official mycobot facebook group and scroll through. It’s a company that sells and forgets hardware without proper software skills… 💸
I think that is changed; I've seen that stability has improved. On the site they claim ROS2 and moveit. Also, they have an industrial type of application Roboflow. I am also a teacher and I wanted to use those for education. What would you recommend using for education on a budget?
Hey! I know your comment is from two years ago, but I would love to know what you would want in an educational robot? What would be the 'must have' features, and the nice to have features? How many students to robot would be the best ratio? And what would the budget look like? Cheers :)
The engineering and mold making costs money -- 700 for a finished unit is not out of the ballpark.
I bet you could not build and ship a similarly capable arm for less (and stay in business!)
He also wouldn't want to develop something so poor in the first place.
They could have just 3d printed the body of the robot.
Very good review ,rdgards
wow... great...
Wait, are there LEGO pins between effector and last joint?
Yes, there are LEGO pins designed to connect effector and Joint 6.
Классная рубрика обзор недорогих роботов👍. А есть новости от руки которую вы обозревали от фермы Innfos ???
Очень их ждём, дайте инфу плиззз🙏🙏🙏
Он не русский. Сильный русский акцент. Но он немец из Швейцарии.
It's like a well packaged children's robotic arm...
I myself seen the cheapest cobots in China for around $7k for very low load work like screwing odd angled screws.
захват манипулятора - огонь :)
Точно :))
👍❤️
Given the cheap hobby gear robot servos, should be $250 max including the Pi, not $600, especially since the lower arm servos will breakdown quickly.
That might be worth a followup video ... when you review a commercial product, does it get worse after the first few hours/1000 moves/months of calendar time, etc? Not so important if it is just for entertainment, and not worth delaying the reviews ... but worth doing a followup later. (Also worth saying whether those additional hours were just to test endurance, or because you found it worth using for something.)
Attach a filament extruder and 3d print.
anyone heard the arm making some high frequency noise
Thanks!
Хороший подарок ребёнку на новый год.
i don't really understand the price tag
Are you sure the gripper doesn’t close? I think maybe you were just too impatient. Try giving it another 5 or 10 minutes, maybe it will close all the way :)
Hobby graded servo's tolerance (variable resistor) is huge, better not to use it in the robotic arm design.
Agree!
This looks like a prototype, given the issues it has. A commercial product that is being sold to end users shouldn't have problems like these. Was it rushed to market?
instead of 6, have 3+3, like 3d printer, but 3 axis hand in the header
3 linear, 3 rotational, freedoms
Hanzhen harmonic drive gear , robot arm gear , automation joint gear , over 30 years experience
The thumbnail looked like you made an arm using plastic pipes!
"They paid me with this robot arm, but I'm not getting paid...?
They don’t give me anything after review. So I can say what ever I want. And this review rather negative, than positive.
shacky, too shacky
this robot looks like my bathroom plumbing
ha ha I yes it does
It should be around $250.
$300 max!
@4:21 there is a noticeable sag of joint #4 with payload compared to the one without.
Well, I should have waited until the next segment with overlayed videos. Nice job! 🙂
I was given this FOR FREE! I’m not returning it it is mine, but I will not give it a bad review because as I mentioned they gave it to me free
What do you mean? I gave them honest review, and it rather negative. In conclusion, I told that this is an expensive toy. I don’t see other good application.
I now know who disliked your video(OEM).😂
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3000.00 € per month to start then paid by shares in daughter companies
for human qualities the doctrine to adopt and promote is 'to believe one must not know, the only good belief is "to believe in humanity", it is equity'
it should be 200$ max
Can it cook pasta?
They remade jibo
\-_-/
Что самое смешное, автоматические субтитры на русском. Видимо, у вас слишком сильный акцент)
Everyone keeps saying "[Company] did not pay me for this review" yet, the [Company] sent you an item to keep...that is payment. I still trust your opinion as honest, however, you kind of start the review with a lie. Just a thought.
Do you think this robot arm is payment? I don’t need such robot arm. I have no use for them. Do you agree to work and be payed by robot arms? Do you think I can sell them? But what about my time, spent to sell them?
I appreciate the transparency of book reviewers who say "I received a review copy, but was not otherwise compensated." Skyentific's wording was less conventional, but I think it was sufficient, since he did acknowledge getting it for free, and at least implied that he got to keep them (not true of all reviews, particularly for expensive products).
Thanks for your review. Saves a lot of money for a lot of people.
This is a perfect example of low quality Made in China pos ...
The BOM cost is probably 1/5 ~ 1/10 of the sales price, typical for a chinese company who doesn't want repeated purchases.
You can probably build a similar robot arm with similar accuracy with lego motor.
😘❤️🇨🇵
Can it be programmed to play chess?
….if i was them id cut that pay load in half.
Теперь я понял, что значит "русский акцент".
I prefer my super armitron
It feels bad to say this is good as a toy.
Why do people continue to write $ as postfix instead of how it is ment to be written - prefix?
It is $10 not 10$ 😆
probably because people say "10 dollars" and not "dollars 10", even tho $ sign as a prefix is indeed the correct way, it just makes a lot less sense
What a shame. It's a really nice design. But it's far too expensive for the cheap components and poor performance.
what was the reason, why its impressive? cable management? i guess it does look pretty tidy, but not remotely as cool, polished and most importantly versatile and functional as the clickbot, if anyone is actually looking for an expensive, semi-useful robotic toy.
For me, it is impressive, how bad it is.
@@Skyentific haha okay i seeeee! yeah that makes sense! :-D
saw this on onlyfans but with some different attachment
Рашан инглиш😁
It twerks)
Yes! :)))
is good that i did not buy one :))
Made in China?
Такое ощущение, что ты русский
I my opinion its not a good robot arm