My Advanced Realistic Humanoid Robots Project

[artbyrobot]

I'm currently working to sew all the finger and wrist bones together for the Dinah robot and mount them to the arm. I wanted to show how I'm doing this process.


Here I tape the bone with adhesive transfer tape 3M 300 LSE. Note that I leave space on either end of the bone to allow some free fabric which is necessary to allow for elasticity as the bones need to rotate after all. Have to have enough free fabric to stretch as the joint rotates, allowing the rotation. But not so much free fabric that the joint is loose either. Has to be just right and snug.




Next I wrap the compression workout shirt fabric onto the tape and cut it to size. Here is just a rough wrap that hasn't been cut down to size yet.




Then here is a bone finished on the sewing and ready to attach to a neighboring bone. The sewing is done with nylon upholstery thread and a curved suturing needle and a surgical pliers using a suturing technique.

[joeqsmith]

OP, I enjoyed seeing your artwork. 

I commonly work on projects that I know very little about, most of which have already been done by others before me.  I would say my failure rates (professional and hobbies) is much higher than my few successes.  Those failures have never discouraged me.

Sorry to mods on my last thread's derailment.  I agree on the decision to lock it.  I take responsibility for not being more adamantly disciplined to stay on topic.  My bad.  This go I plan to really emphasize staying on topic to the technical aspects of the humanoid robot build and not accommodate going into philosophy, morality, religion, politics, etc. 

Looks like this is proving to be more difficult than you originally thought.  I'm not too surprised by the number of comments going on about .....  Personally, I don't care about you engaging in such discussions.  I would do the same, and am surprised Dave hasn't yet banned me. 

One American's view on Canada's Hitchbot
https://deadspin.com/hitchbot-was-a-literal-pile-of-trash-and-got-what-it-de-1721850503/

...As far as building humanoid robots, I'm at point 5. Oh wait a minute you may say, that's not fair! Why is that - am I building one? No. Am I going to build one. Nope. But because I realize how little I know at the moment (about realizing the entire humanoid robot with artificial intelligence project) and how much I would have to learn to create one, I know what I'd have to do. That's the difference. It's the wisdom from experience to be able to examine a problem and realize what it would take to realize it. That's the difference between you and a lot of members here. It's not hate it's wisdom and experience crashing into your lack of it (in this area). I can look at a project and realize where I stand on that graph and how best to proceed, I don't think you can yet.

I extended the image to include my own thoughts.  I am far up that mountain, looking at the blackness and knowing I have learned very little and there is not enough time.  While I continue to learn at a slower pace, the end is approaching and it's a long way down...   Splat...


****
That graph asks the age old question of "Wait but why".   Why waste time repeating what has been done, learning about technologies from the past,  work on hobby projects that I know little to nothing about??   

It has provided me with a life long career that has allowed me to take care of my family,  hopefully contributed to the advancement of mankind in some small way (or at least hasn't set us back too far), and I have greatly enjoyed the journey.   

One last comment.  When I was a youngster, I took a welding class in public school.   This is a skill that I continue to use to this day.  I own a cheap MIG wire welder for small household jobs, like adding a hook to my home made bird feeder hanger for a wind chime.  I don't need to grind things down to try and pretty them up.   I am not foolish enough to weld anything critical.  For that, I have a friend who is skilled in the art. 

[xrunner]

Check this out. The video -

Custom ESC Making Techniques | Building Humanoid Robots #207

The TO-220 package is too big for his cramped robot. What to do? Make it smaller. But how?

He makes the footprint of a TO-220 MOSFET smaller by -

First: Clamp the body of the part in a pair of vise grips
Second: Grab the heat sink tab with pliers
Third: Bend it back and forth, over and over, until it fatigues and breaks off

Presto - a custom mod!

Note to readers out there: Look at the advice given by people who know what they're talking about to lay people that would do this and you'll find out something not so shocking. Bending the tab back and forth to break it off causes internal stresses and is an ignorant thing to do.

[wobbly]

Note to readers out there: Look at the advice given by people who know what they're talking about to lay people that would do this and you'll find out something not so shocking. Bending the tab back and forth to break it off causes internal stresses and is an ignorant thing to do.

Not to mention that MOSFETs are easily damaged even by touching them without proper ESD precautions.  Polyester clothing isn't ESD safe.

But let's try to be reasonable - we can't all be experts in everything.  I'm sure he makes up for such shortfalls by being awesome at other things.

Like welding for example (taken from http://www.artbyrobot.com/blog.php)...

[SteveThackery]

Like welding for example (taken from http://www.artbyrobot.com/blog.php)...

I absolutely love that photo and I laugh every time I see it. In fact I've downloaded it and I'm thinking of using it as the desktop picture on my PC.  It'll cheer me up no end.

[xrunner]

Like welding for example (taken from http://www.artbyrobot.com/blog.php)...

I absolutely love that photo and I laugh every time I see it. In fact I've downloaded it and I'm thinking of using it as the desktop picture on my PC.  It'll cheer me up no end.

Maybe the robot can teach him how to weld properly if it ever does work.

[jpanhalt]

Here's a starter from Google AI.  Then again, maybe it is too simple.

To MIG weld properly, you can:

• Prepare the material: Clean the metal of grease, oil, paint, dirt, or rust. You can also grind out cracks in the surface.
• Inspect the equipment: Check the hoses, gas pressure, welding tips, and welding gun.
• Use the right technique: Use a push or pull technique, depending on the job. A push technique can give you a better view of the work.
• Use the right tip: For beginners, match the tip to the wire. For example, use a 30 contact tip for 0.030-inch wire.
• Maintain the stickout: The distance between the gun and the base metal should be around 3/8 inch.
• Move the gun steadily: Moving too slowly can create an oversized bead, while moving too quickly can reduce penetration.
• Maintain the angle: The angle of the gun depends on the type of joint. For example, for a butt weld, hold the gun at a 90-degree angle. For a T-joint, hold the gun at a 45-degree angle.
• Use a strong ground clamp: A copper ground clamp conducts electricity best and can improve your welds.
• Avoid windy areas: Wind can blow shielding gas away from the weld pool.
• Use a close outlet: An extension cord might not deliver enough power.

[Gyro]

Like welding for example (taken from http://www.artbyrobot.com/blog.php)...

I absolutely love that photo and I laugh every time I see it. In fact I've downloaded it and I'm thinking of using it as the desktop picture on my PC.  It'll cheer me up no end.

Maybe the robot can teach him how to weld properly if it ever does work.

Thou shalt not weld better than thy creator.

[RJSV]

Uhh;  Friends,  I am unsure about that found heat sink TAB removal !   Isn't that for bringing in the HEAT,  for the mosfet to run on ?
Otherwise,  like in the MARS probes,  you would have to put a heating element nearby.

Pretty sure,  this time.

[Analog Kid]

Like welding for example (taken from http://www.artbyrobot.com/blog.php)...

I absolutely love that photo and I laugh every time I see it. In fact I've downloaded it and I'm thinking of using it as the desktop picture on my PC.  It'll cheer me up no end.

See? Schadenfreude; admit it.

[Analog Kid]

Heh; figured out what this whole damn thread (and project) reminds me of:
Leonardo da Vinci's plans for a flying machine, where he basically tried to create an artificial bird.
The difference, of course, being that da Vinci was a genius, whereas our OP, probably not so much.

[RJSV]

O.K. I went out to read up on what does
   'Schadenfreude' mean ?
It means to take pleasure,  from someone's misfortune.    I was hoping it meant that events don't favor you,  when YOU mess up...a purely singular phenomenon.

   By the BTW,  Google word complete spared myself from too much trying to type in that word.   No problem,  Google already Spying on my every click,  so they knew how to cover for me.

[ebastler]

See? Schadenfreude; admit it.

The German language also offers Fremdschämen. A less popular export than Schadenfreude, but it nicely captures my main reaction to the present project.

[Analog Kid]

Ah, that's another good one: "vicarious embarrassment".

Let me explain my Schadenfreude just a bit:
It's not just simply that I'm taking pleasure in the OPs obvious misfortune here: that would just be mean-spirited.
It's the addition of hubris^[1] on his part that makes the Schadenfreude appropriate here. Who among us doesn't want to see someone knocked off his high horse if they come on with so much bluster and bluff?

^[1] Another word for y'all to look up.

[PlainName]

Who among us doesn't want to see someone knocked off his high horse if they come on with so much bluster and bluff?

Won't that occur naturally? That is, in the case of perhaps the welded wrist, at some point it will prove to be either workable or not, and the belief that it is fine will be tested by physics.

It is not the 'want to see someone knocked off his high horse' that is happening here so much as 'want to knock him off his high horse'. If it's going to happen anyway, why does it need pushing along? Is it so that his hole will be dug deeper, the speed he hits the wall will be higher, the embarrassment of being wrong greater?

[Analog Kid]

Not sure about your concern for the OP, which seems misplaced. He seems quite impervious to any and all sniping against him. (= hubris) Which only increases the natural human propensity towards Schadenfreude.

And if somehow he manages to succeed in his fool's errand, then the joke will be on us, won't it?

[RJSV]

   Ah,  what that single word:  'HUBRIS' reminded me of (thanks Analog Kid).

   They were expressing Hubris,  running the loud printing,  in a crowded office.  Others,  we needed some quiet for using the phones,  as a regional support operation.  Having some 70 field offices and perhaps 350 field Engineers,  we just needed simple quiet.

   The hubris driven (hubrisic ?) replies were so smug,  that I could not accept blame for the response next.  Hubris asking for,...no,  begging for a 'corrective' outcome:

   So you see;  the loud printer fellow was messing with the resident Printer Engineer.
I knew all the bad bugs,  in operating system and controllers.  That included a pesky problem with issuing 'Line Feeds' which is a term used in Teletypes.

   A brief,  8 seconds of thought, and realized that some software commands would re-create the symptoms,  of extra unwanted paper movements,  and with any upgraded printer.

   Go onto the office local network,  while the printer was running (loud !),  of course.  They didn't even bother with the available sound deadening cover.   Typed in the buggy command,  and voila;  Xtra line feeds,  but just only every 80 lines or so.

That didn't come out so well,  when using paper forms,  either.

   Never would have considered doing that,  but sure had OUR little section uh,  amused.

Hubris is a motivating word,  to the opposition !

[xrunner]

Not sure about your concern for the OP, which seems misplaced. He seems quite impervious to any and all sniping against him. (= hubris) Which only increases the natural human propensity towards Schedenfreude.

And if somehow he manages to succeed in his fool's errand, then the joke will be on us, won't it?

Yes and here's what he said earlier -

Well Steve, I'm pretty sure that guy thought you were trying to dissuade me.  I see you aren't. I like that you think I will fail.  The more people who think I will succeed the more boring the project would get because that means I have to up the stakes and increase the scope until once more nobody believes I can do it.  That is the barometer by which one can determine if their goal is sufficiently epic and challenging.

Quote from an old cereal commercial:

Hey Mikey I think he likes it ...

[Analog Kid]

Check this out. The video -

Custom ESC Making Techniques | Building Humanoid Robots #207

The TO-220 package is too big for his cramped robot. What to do? Make it smaller. But how?

He makes the footprint of a TO-220 MOSFET smaller by -

First: Clamp the body of the part in a pair of vise grips
Second: Grab the heat sink tab with pliers
Third: Bend it back and forth, over and over, until it fatigues and breaks off

Presto - a custom mod!

Note to readers out there: Look at the advice given by people who know what they're talking about to lay people that would do this and you'll find out something not so shocking. Bending the tab back and forth to break it off causes internal stresses and is an ignorant thing to do.

Even I know better than that. If I were to make that mod (and I might do that, given a space constraint), then the obvious thing to do would be to cut the tab off using my Dremel with an abrasive disk. Going slow there'd be some heat, but manageable, but no torquing stress like the way he did it.

Fucking genius there ...

[artbyrobot]

the stress was localized in the mosfet tab snap and the snap was very clean.  I see no reason this would harm the internals which I protected by the vise holding the entire black portion of the mosfet, protecting it from the torquing action.  I can assure you all my tactics on this were perfectly safe for the mosfet and a dremel tool would be too slow by comparison.

That tab is for mounting and slightly for heat sinking.  I was planning to use braided copper solder wick glued to the back of the mosfet with silicone thermally conductive adhesive compound to wick away heat after the fact, making that tab a unnecessary redundancy and space waster. 

In any case, I discovered smd mosfets that have the same specs and this blew my mind and I have since moved on to them.  However, I will still be using and testing the ones I snapped the tab off for a certain project of mine and when they work perfectly, I expect you all to eat crow on this matter.

[xrunner]

the stress was localized in the mosfet tab snap and the snap was very clean.  I see no reason this would harm the internals which I protected by the vise holding the entire black portion of the mosfet, protecting it from the torquing action.  I can assure you all my tactics on this were perfectly safe for the mosfet and a dremel tool would be too slow by comparison.

You can "assure" nothing about your tactics at all because you have no clue what you are doing to those parts internally. If you'd use google you'd see that people who know a whole hell of a lot more than you ever will about electronics say no. But yea you are the expert at all that you do.

Same as most of your other defenses - Dunning-Kruger level 1

[Analog Kid]

I can assure you all my tactics on this were perfectly safe for the mosfet and a dremel tool would be too slow by comparison.

"Wire strippers? Nah, too slow; I just put the wire between my teeth and bite the insulation off. Much faster."

"Cutoff tool? That's for losers; I just whip out my cold chisel and give it a whack or two with my hammer."

"Drill bits? Who needs a drill when you can just grab an awl and punch a hole in the chassis!"

[Alex Eisenhut]

Or, you know, just order a package like a TO-252 or TO-263 that comes the right size (for you) from the factory ... 

That tab is for mounting and slightly for heat sinking.

Quite the opposite...

[Alex Eisenhut]

BTW what has the response been to your more-than-generous offer to work at -5$/hr?
I'd like to present you my portfolio of robot parts. I also have a robot arm I am working on.

[RJSV]

   What if (the moderators) put in place a system:   PAY TO CRITICISE.   Similar to the click based 'creater' gig (content creator).

   You'd still be able to create content,  negative criticism,  but would be charged for the potential 'harm' to an OP.
Less hard feelings by the OP that way.