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Spyder
(@spyder)
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Joined: 2 years ago
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@jimib

The batteries are lead-acid motorcycle batteries, very heavy, but fairly cheap

The motors have been discontinued, but, I understand (from a thread elsewhere in this forum) that people have found decent replacements for them. Gear motors with built-in encoders (encoders are not yet connected. I still have much work to do. You might be able to tell from the video, it doesn't move in a straight line due to the fact that the encoders aren't actually doing anything)

These may or may not be the replacement motors that were spoken of in this forum

https://www.servocity.com/5202-series-yellow-jacket-planetary-gear-motor-188-1-ratio-30-rpm-3-3-5v-encoder/

The remote control is programmed for a max speed of 60%, and anything less than 20% is approaching the "too slow" range

Everything regarding the robot moving (wheels, motors, gears, motor-mounts, etc) are from servocity

The RVIZ that displays the LIDAR is ROS1 Melodic, connected directly to the Jetson, and the sonar sensors are HCSR04, connected to the Arduino, that, while they do show data, and make a nice display, are basically dunsels until I get the rest of ROS working. Same thing with the motor encoders, connected, but not programmed to be of any use at all

The frame is 3/4" angle iron, and the skin is 1/4" plexi because I want the WS2812B lights inside (which also don't do anything yet) to glow thru the skin. A Pi could do that, or an Arduiino, or an ESP. In either case, I'll dedicate one specifically for lights so that they have only one job

That's about all I can think of to tell you

Posted by: @jimib

Um by the way it was the Scarecrow that wanted a brain

Yea, brainfart. I don't know why that didn't occur to me while I was searching for a picture of "cowardly lion" thinking that he wanted a brain


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Duce robot
(@duce-robot)
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Joined: 2 years ago
Posts: 576
 

@spyder looks good coming together 😁👍.long time no hear.


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Spyder
(@spyder)
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Posted by: @duce-robot

coming together

Yea... slowly

And the doggie has a tail now

image

While investigating the installation process, I decided to add that extension plate so that I could still remove that rear panel without removing the antennas. That stuff was not easy to bend

Posted by: @duce-robot

long time no hear.

Yea, had a really cool contract to cover for a very demanding client


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Duce robot
(@duce-robot)
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@spyder performance by design 👍 looks good .your probably going to start a fad amongst the other techs where you work .


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Spyder
(@spyder)
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Posted by: @duce-robot

looks good

Thank You !

Posted by: @duce-robot

performance by design

Heh. It might have been better if I'd written down some plans for the thing. Or computerized them, or whatever, cuz it only occurred to me when I started mounting the tail that my original plan was never gonna work. The next time I tried to remove that rear panel, I'd have to remove the antennas too. That's why I added that extra plate

Poor planning on my part

Posted by: @duce-robot

your probably going to start a fad amongst the other techs where you work

That'll probably never happen. Took me 2 years to convince 2 of them to get a 3D printer, and the best guy there told me that he "could never do what you do" while he's standing there doing the exact same job as I do

Maybe he just lacks confidence. Maybe if I start asking him for advice it'll raise his confidence level

This post was modified 1 month ago by Spyder

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Melbul
(@melbul)
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Joined: 6 months ago
Posts: 26
 

Very nice project Spyder!

If I was in a similar situation to you, I would probably have done something along those lines but, being a mobile mechanic, I don't have room on the vehicle for anything like that.

The K9 copy looks great, I assume you will have a voice synthesiser and face recognition eventually?

Surprise those work colleagues with a "good morning (whoever)" ?

keep up the good work!

 

mel.


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Duce robot
(@duce-robot)
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@spyder  well if it works as a robot mission accomplished.  Sometimes it's fun to build without plans just to see where it goes but plans are the correct way .unless you're like me I never make plans for anything I build lol.😁👍the cool thing is now you can just knock one together  alot quicker. Cool build.


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Spyder
(@spyder)
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Posted by: @melbul

The K9 copy looks great

Thank you. I came as close as I could considering the weight carrying capacity and completely incorrect color due to my (still disconnected) lighting. But I did use the actual (although slightly modified) full scale plans for the original K9, so, it's almost sorta prop accurate, plus I'm sure the original didn't use angle iron in the frame, but, that one was just a prop, and this one is supposed to carry around a whole set of tools (which is something I should get onto checking... what is its ACTUAL carry capacity anyway?) I've got a couple of 28LB cat litter boxes in my workshop. I should check its max payload

Posted by: @melbul

I assume you will have a voice synthesiser and face recognition eventually?

Um, facial recognition might possibly be a realistic goal. Would need another computer to be installed (which isn't a HUGE issue), but, that seems doable I think... 

Voice synth ? Not sure about that one. I've been having a problem with localnet voice synth as opposed to internet voice synth. I'm not a fan of having the bot having to talk to the net to get its info, and if I don't, the voice sounds like... well, not great

Posted by: @duce-robot

well if it works as a robot mission accomplished

It doesn't. Right now it's just a glorified remote controlled toy that looks cool 🙁

Posted by: @duce-robot

the cool thing is now you can just knock one together 

Oh sure, I can just knock one together easy as pie right now

I don't even need parts, Just like Tony Stark, I can just demand VIA mind control that they fly themselves together

Hang on. Let me scroll back to the beginning of this project...

It's only been 1 year, 11 months, and 2 weeks since I started this project, and you expect me to "knock one together"...

Okay, ya know what ? I can do that...

(sorta almost, kinda) Done... 2 wheel robot sorta almost completed (as long as you don't count the fact that it doesn't do anything)

Who's gonna help me with the programming (which I have no idea how to do) for it ?

It's ready to go. Done. Total build... Done... Except for the part about the software, which might be slightly significantly lacking on my part

image

If I was ready to reveal this thing, I would have, but I'm not, cuz it doesn't work... (yet)

 

I can't just slap things together


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Duce robot
(@duce-robot)
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@spyder looks like your getting there. Programming  is the hard part but if the robot that you have built will work once programmed. Then it's just a matter of time .programming a complex robot takes time I'm still installing things in ros for duce robot .then you find things like ros 2 oh boy! But I got a cool book ros robotics projects second edition it may not be an end all for ros but it does shed some light on the entire ros system.  42 bucks on amazon if you want to check it out and don't forget you can tele op in ros even though it isn't autonomous you can tele op it from a keyboard .😁👍


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Spyder
(@spyder)
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@duce-robot

Parts of ROS are working for me just fine. The specific problem I'm having is drivers for the motor control board. Apparently nobody has ever used the MDD10 board in ROS1 before so there's nothing I've found online that I can "steal". Until I solve the driver problem, teleop won't work, and the only way I have of moving the bot is remote control thru the phone app I have. (the app also works on the computer, and it's not technically an app, it's just a web page that I formatted to fit on my phone screen)


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Duce robot
(@duce-robot)
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@spyderif you are using cytron you can use the arduino node I just took the pwm dir example expanded on it for left and right turns forward and backwards and just run the sketches from a wireless keyboard  a cheap tele op till can get the lidar working  it's just a gigantic system but I found it also has a vast amount of canned programming available so that is where it is likely to end up for me.


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Spyder
(@spyder)
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@duce-robot

That's an interesting thought. When I ordered the MDD10, I not only ordered an extra one for the Jetson, I also ordered one for the arduino, so, if the software already works for the arduino, this could be a fix

I'll have to think about a solution for the installation, and then figure out the sketches

That's a good idea. And it saves me from having to work on that balancing robot, which I'm pretty sure I'll never be able to get working anyway

Thanks. If the teleop works, then the mapping plotter thing should work too

I'll let you know how it goes


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Spyder
(@spyder)
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Posted by: @duce-robot

till can get the lidar working

Wait. What's wrong with your lidar ?

That was the easiest part for me


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Duce robot
(@duce-robot)
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@spyder it should


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Duce robot
(@duce-robot)
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@spyder it works I might have it a little high up but it seems to map the room pretty well .


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