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91
Misc / Articulated Robot Question
« Last post by meilingerwooddesign on January 06, 2022, 05:46:46 PM »
Does a cylindrical robot with 2 vertical rotary joints (one on base, one on arm) make it articulated?
If so, when I remove one rotary joint (base or arm), does that make it non articulated?
Thanks
92
Mechanics and Construction / Re: How to disable torque/acceleration limits on BLDC motor?
« Last post by mklrobo on November 23, 2021, 02:05:42 PM »
 8)  excelsior!   8)

   Hello again!   ;D

   Another tactic your could do, is to buy a truck with the motors already on it; take them
off and use those on your project! Sounds crazy,  :o  I realize, BUT, you know those
motors work, AND, as cheap as the RC vehicle get, you probably will pay almost the
same price!  ;)

Good luck with your project!! see you  :) same robot time, same robot channel!!   :)

93
Mechanics and Construction / Re: How to disable torque/acceleration limits on BLDC motor?
« Last post by mklrobo on November 17, 2021, 08:18:55 AM »
 8)  excelsior!!   8)
   

    Hello! I reviewed the info on your motor;
" The Turnigy TrackStar Sensorless Brushless Motors offer outstanding performance at an incredible price!

Featuring a quality CNC motor can, hand-wound high purity copper windings and powerful sintered neodymium magnets, you wont find a better priced motor of this caliber anywhere else!

The Turnigy TrackStar brushless motors make a great upgrade for 1/8th short course trucks, monster trucks, buggies or anything else that uses 42 size motors. "

  According to the advertisement, I would think the motor would have no problem with the application you are trying
to do. However, " there is many a slip, between the cup and the lip".   :'(

   What I am saying, is consider the following;

1> review the DC power supply you are using - will it deliver the required amps, and more?  ;)

2> experiment with loads on the wheel with the step programming to find out the parameters of
     what might be going on. - save the data, as this will help you navigate problems in the future.  :-[

3> try a gear down transmission - the motor is rated for running fast, which is great, but may not
     deliver the torque advertised. (reviews for the motor are great IF you have a RC boat)  :-X

  I went through the internet briefly looking for reviews of the motor, and found great reviews for RC boats,
but not any for trucks or wheeled vehicles.  :-\

  Good luck with your project!  ;)

  see you same robot time, same robot channel!   8)

94
Mechanics and Construction / How to disable torque/acceleration limits on BLDC motor?
« Last post by Rollsizzlebeef on November 10, 2021, 01:40:38 AM »
I am trying to drive a wheel with a brushless DC motor controlled by an ESC connected to an Arduino. When there is no load on the motor I am able to run the motor fine, so I know the Arduino program and wiring works. However, once I attach the wheel I want to use, the motor (not the ESC) rotates the wheel a little, starts beeping, and shuts off. The wheel should be well within the torque range of the motor. The motor does this if I also program a large step input for speed, so I think this is some kind of safety feature. Has anyone heard of anything like that? How do I control this motor properly?

Link to motor: https://hobbyking.com/en_us/trackstar-1-8th-2050kv-brushless-sensorless-motor.html#qa[bW9kZT03JnBhZ2U9MSZxdWVzdGlvbl9zZWFyY2hfY29udGVudD0=]

Link to ESC: https://www.amazon.com/dp/B08HWQ58QX?psc=1&ref=ppx_yo2_dt_b_product_details
95
Mechanics and Construction / Re: Do you think this robot movement is useful?
« Last post by naffoff on November 09, 2021, 02:17:50 AM »
Hi!

I am so sorry for not replying sooner!

Yes it can move in quite flexible way,  what I am experimenting with that I have not seem tried before, is using casters but without powering the pivot point, so you have to use the speed of each wheel to move the car to change direction of the wheels.
96
Mechanics and Construction / Re: Do you think this robot movement is useful?
« Last post by mklrobo on November 04, 2021, 12:18:48 PM »
 8)  excelsior!   8)

  I love this robot!!!!   ;D

   It looks like all the drive wheels can be moved independently, thus, making
turns on corners in cramped spaces a breeze.

   It first glance, I would think that a type of movement model could be articulated
to give a prediction of how effective this would be in a cramped environment.(like someone's house)

     I am wonder is 2 chassis could be used; one for traveling, and one for close quarters turning, a
chassis within a chassis?
97
Mechanics and Construction / Do you think this robot movement is useful?
« Last post by naffoff on November 02, 2021, 12:31:22 AM »
I am a self taught robotics enthusiast I have been building an all wheel drive robot using torque vectoring. It steers like a swerve drive but without the complicated drive-train. I am wondering if you know situations where the robot movement is useful?
Looking forward to all your replies!

https://youtu.be/iPlnzkzqwRQ
98
Mechanics and Construction / Re: Automatic Ticket Dispenser
« Last post by mklrobo on October 13, 2021, 12:23:19 PM »
 8) excelsior!  8)

 Looks like a good idea; My first impressions of this is to find a real one, and adapt
that to what you need. If they are too expensive, you can get the plans to see how
the mechanical works, then follow the plans from there.

  The real issue here, is the control of how many tickets are awarded for a specific behavior,
and how will the tickets be used to work toward the prize?   :o Is  it a "get out of trouble" ticket?
Is it candy? is it a game console? Is it a trip to an amusement park? Pizza on Friday night?  ;D

   incrementing the tickets for a specific reward implies some kind of control code. Once the control
code is functional, then "map" that to the mechanical control to increment the tickets.  ;)

  Sound like fun, no matter what - I suspect the kids will be giving you "hints" of how big to make the
prizes!!   :) :)

  Good luck!  8)
   
99
Mechanics and Construction / Automatic Ticket Dispenser
« Last post by gurntham on October 13, 2021, 09:56:26 AM »
I would like to create a “token system” using raffle tickets to reward my children for achieving good grades, completing chores, etc.

What I envision is a lockable box with a ticket dispenser, a keypad, and a 2-digit LED numeric display so a parent can enter the number of tickets to dispense. Similar to this:
 

I would like to make it as compact, simple, and affordable as possible.

It would be great if I could also “password protect” it so a kiddo doesn’t just help themselves. Fingerprint scanner??

I’ll be honest… I’m a total noob.  So it would be immensely helpful if I could assemble a step-by-step guide on how to interface the components.

Here are some links to components I’ve found so far:
Ticket dispenser = https://ebay.to/2YLYCsJ or https://ebay.to/2YIHLY6
Numeric Key Pad = https://ebay.to/3DGePii or https://amzn.to/2YHmE8o

I welcome any suggestions, referrals, and guidance.
Thank you for your help!  8)
100
Mechanics and Construction / PsychoAndrotics
« Last post by mklrobo on September 05, 2021, 10:14:29 AM »
 :) excelsior!!   :)

  Hello again, all robot superheros!!  8)

  It has been said that the eyes are the windows to the soul; so
it could be implied this has a great bearing on the mind.

  I have been searching a long time for an AI software to control my robot, just like the rest of you.
I think I have found a software solution, in which I would share; I approached
the problem from the perspective of creating a new type of mind. A
strong label that will act like a "compass" to build upon!  :D

  I have named my "science" for the creation of the mind software,
to be  psychoandrotics.  -which means, the study of the
mind of the artificial man.   :o

   It is a catchy phrase, for sure, but has no substance without a
reference to build upon. I found the name of the software that
is used in IBM's Watson, which is named Monte Carlo.
Watson Artificial Intelligence won at Jepardy, helped solve crimes
& medical ailments such as cancers; also used in self driving cars.

  So, if you are looking for real good software to help build
your robot brain, may I suggest the Monte Carlo software
in the context of psychoandrotics?   ;D ;D

   I have provided some information to build your superior
robot body, and the foundation for your robot brain; now,
all you need is my new robot toy to complete your total robot!

  see you next time,  ;D same robot time, same robot channel!  ;D
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