mArlo Debut - UPDATE with Video Tour

WhitWhit Posts: 4,004
edited June 13 in Robotics Vote Up0Vote Down
mArlo, my mid-size Arlo robot platform, is complete and running as of today - Memorial Day, May28, 2018. mArlo uses the components of the Parallax Arlo Complete Robot System in more compact configuration - just under 12" in diameter. Many of my parts are from previous versions of the current Arlo.

Below are build photos of the final assembly and a quickly shot video of the mArlo running some BlocklyProp Code written for the Arlo using Ping))) ultrasonic detectors for obstacle avoidance. It is called Arlo Roaming with Ping))) Obstacle Detection. The code is at this link - http://blockly.parallax.com/blockly/editor/blocklyc.jsp?project=15424 Notice the addition of an additional breadboard area in the final photo.

Whit+

"We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
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Comments

  • 57 Comments sorted by Date Added Votes
  • Very cool, Whit! Thanks for sharing.

    Man! You've got some serious battery power on that thing!

    BTW, I like the photos from your shop. Can you show us around some more, please?

    -Phil
    “Perfection is achieved not when there is nothing more to add, but when there is nothing left to take away. -Antoine de Saint-Exupery
  • Super-sized the power system because this will be the robot that collects the church offertory. :smile:
  • WhitWhit Posts: 4,004
    edited May 29 Vote Up0Vote Down
    @Phil Pilgrim (PhiPi) - this shop is my Dad's - really nice - well organized! Will post photo next time I'm there.

    @Ken Gracey - You got that right!

    Set up with two SLA batteries, mArlo weieghs about the same amount as Aron, but because of its size - it feels much heavier!
    Whit+

    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
  • Whit, Looking good!

    If I didn't know better I'd say you cut up the counter top from your kitchen. Now *that* is dedication to robotics! :smile:
  • AwesomeCronkAwesomeCronk Posts: 369
    edited May 29 Vote Up0Vote Down
    I have seen threads about issues with the Arlo motors recently. Are you having issues with encoder failure and axle rubbing, too? Or maybe that may just be due to the large size robot, yours is a lot smaller by comparison.
    The greatest thing about logic is that, once you have followed the thought train, it is then your own.
  • WhitWhit Posts: 4,004
    edited May 29 Vote Up0Vote Down
    @GordonMcComb - Thanks - cutting boards were cheap, easy to find, and tough - the closest thing I could find locally to Arlo’s platform material - screws self-tap too!

    @AwesomeCronk- No issues here - and these are the very first 12V motor and wheel sets Parallax sold - long faithful service.

    I think some folks needed to update the firmware on their DHB-10 motor control board. Easy to do - see the Arlo section at learn.parallax.com
    Whit+

    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
  • Ah. Makes sense.
    The greatest thing about logic is that, once you have followed the thought train, it is then your own.
  • ercoerco Posts: 19,324
    Great job, Whit! Certainly makes for a memorable Memorial Day!
    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • Whit, While on the subject of the base, inquiring minds want to know how you cut it out. Or did it already come in pretty circles?

    There's some mighty fine chamfering on those edges. Almost like you have the right tool for the right job.
  • @Whit-Thanks - cutting boards were cheap, easy to find, and tough...

    That is a terrific idea for a bot platform, going to have to hunt down a few for my Slammer project. My plywood is starting to get a little weak from all the holes I drilled. Would you happen to know what kind of material yours is? Did it require any special tools for cutting?
    Florida, between St. Petersburg and the Gulf of Mexico

    Do not look directly into laser with remaining good eye...
  • Neat robot
  • WhitWhit Posts: 4,004
    edited May 31 Vote Up0Vote Down
    @GordonMcComb
    @Hal Albach - My prototype was cut using a bandsaw - drilled a center hole, made a pivot and spun the board to make the circles - then cut the wheel notches on the middle platform, the bottom is just a rectangle.

    Once I had everything figured out - I used a CNC router to cut the final boards after making drawings. All edges are just hand sanded.

    @Martin_H - Thanks!
    Whit+

    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
  • WhitWhit Posts: 4,004
    Parallax mid-sized Arlo, m-Arlo - learning to make accurate turns. Programmed to Beep, turn 90 CW, Beep, turn 180 CCW, Beep, and turn 360 CW, Beep - all at a very controlled speed. This is all in C - BlocklyProp is not able to take advantage of all the DHB-10 features yet.

    Whit+

    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
  • ercoerco Posts: 19,324
    What a lovely mArlo, Thomas!


    marlo.png
    452 x 605 - 576K
    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • WhitWhit Posts: 4,004
    That Bot!
    Whit+

    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
  • WhitWhit Posts: 4,004
    edited June 9 Vote Up0Vote Down
    Hey All,

    Spent some time troubleshooting an IR Remote issue with Parallax.

    We are still working on it, but...
    Parallax customer/technical support is SECOND TO NONE!

    Thanks to you all!

    UPDATE: The rest of this story is here - http://forums.parallax.com/discussion/168600/sony-ir-with-m-arlo-bug-solved#latest
    Whit+

    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
  • WhitWhit Posts: 4,004
    What's on top...

    m-Arlo%20Layout.JPG
    644 x 434 - 62K
    Whit+

    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
  • ercoerco Posts: 19,324
    I like your clear photos and documentation, Whit. Have you considered writing an article on mini Arlo and letting your project bear fruit and multiply? SERVO magazine needs authors, possibly MAKE too. PM me for details.

    BTW, does your mini Arlo burp like this one?

    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • WhitWhit Posts: 4,004
    With the Propeller Activity Board WX's micro SD card, all I have to do is make a wav recording of Arlo's burp...

    Easy peasy - m-Arlo will be burping in now time. See http://learn.parallax.com/tutorials/robot/activitybot/remote-control-rock-talk-and-roll-activitybot on learn.parallax.com - This ActivityBot sounds just like Stephanie!
    Whit+

    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
  • WhitWhit Posts: 4,004
    edited June 12 Vote Up0Vote Down
    Parallax "m-Arlo" Robot Video Tour...

    Whit+

    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
  • Whit,
    What tool did you use to cut out your cutting boards?
    Jim
  • WhitWhit Posts: 4,004
    edited June 13 Vote Up0Vote Down
    @RS_Jim - The prototype I made to try everything out was cut using a bandsaw - I drilled a center hole, made a pivot and spun the board to make the circles - then cut the wheel notches on the middle platform, the bottom is just a rectangle.

    Once I had everything figured out - I used a CNC router to cut the final boards after making drawings on AutoCAD. My sister teaches at Louisiana Tech and has access to some very sophisticated tools! Below is a video of the mid-deck being cut. All edges are just hand sanded to smooth them and slightly round the edges.

    Whit+

    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
  • You have inspired me to make a TArlo(T for Tiny)!
    The greatest thing about logic is that, once you have followed the thought train, it is then your own.
  • WhitWhit Posts: 4,004
    @AwesomeCronk - Can't wait to see TArlo!
    Whit+

    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
  • In that case, two questions.
    1. What is the diameter of MArlo?
    2. Any ideas for a very small DC Motor Driver?(2-channel)
    The greatest thing about logic is that, once you have followed the thought train, it is then your own.
  • Or, I could use 3-inch wheels and CR servos.
    The greatest thing about logic is that, once you have followed the thought train, it is then your own.
  • WhitWhit Posts: 4,004
    m-Arlo is 11-3/4" in diameter.

    I think using the ActivityBot 360 servos and wheels would make a great t-Arlo, especially since the 360 servos include the encoder function with on extra wire. You could use a Propeller Activity Board WX too. The diameter of t-Arlo would be about 6" - I may make one too! This is a super idea.

    My parts list would include:

    2 - Parallax Feedback 360° High Speed Servos - https://www.parallax.com/product/900-00360 - $50
    1 - Propeller Activity Board WX - https://www.parallax.com/product/32912 - $80
    1 - Battery Holder 5-AA Barrel Jack - https://www.parallax.com/product/753-00007 - $4

    Better yet...
    1 - Small Robot to ActivityBot 360° Upgrade Kit - https://www.parallax.com/product/32603 - $100 (save $25!)
    2 - Small Robot Wheel and Tire - https://www.parallax.com/product/28114 - $8

    All you need then is a base (cut like m-Alro's mid-deck, a top deck, way to mount the servos and the "tail" wheels - front and back - I might even use a
    1 - Small Robot Chassis - https://www.parallax.com/product/700-00022 - $25 (and another ball wheel mount) and
    2 - 1" Tail Wheel Ball(s) - https://www.parallax.com/product/700-00009 - $8

    You could make the whole thing for around $150.

    Whit+

    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
  • I was looking at the original CR servos, but 360s would be much better.
    I am on a shoestring budget, here, so I was actually looking at double wall cardboard.
    I would roll with your first list, but have a bs2 on a breadboard instead.(or something like the picture)
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    The greatest thing about logic is that, once you have followed the thought train, it is then your own.
  • If I put the servos back-to-back, I could make this thing as small as 5 to 6 inches diameter.
    The greatest thing about logic is that, once you have followed the thought train, it is then your own.
  • WhitWhit Posts: 4,004
    @AwesomeCronk - Cool - I totally understand being on a budget! Have fun and keep us posted.
    Whit+

    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
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