Big Boe-Bot (BBB)

Big Boe-Bot (BBB)
22 Feb 2012

This weekend I made a large Boe-Bot base using Parallax CNC motors (#27971). I scaled the Boe-Bot up 2.4X in dimensions. The Boe-Bot wheel diameter is 2.5" and the CNC wheels are 6" dia.

http://www.parallax.com/tabid/768/ProductID/507/Default.aspx















Motors: 3/4" wood, 1/4-20 x 1" screws.
Caster Wheel: 1/4-20 T nut, 1/4-20 x 2.5" hanger bolt, 1.25" dowel

SolidWorks Chibi Robot Assembly

This is a model of the shoulder joint on a walking robot I am designing.


This is the first assembly of this robot I have made in SolidWorks. Previously it was in Inventor.

LED's controlled by Gameboy

16 December 2009

The hardware version of "Hello World". Finished final exams today so got some time to do some hacking...

The Gameboy advance controlling an LED via it's serial port, aka Link Cable. Thanks to
avelino herrera morales at http://gba.atlantes.org/index_en.html#hardware for code and schematic.

Gameboy Programming

Sat 3 October 2009

I'm going to use a Gameboy, PSP, Nintendo DS, or somesuch device that includes a display screen, as a remote control for my robots. You'll press buttons on the device, and the software on the device will read the buttons and send commands out to a Zigbee/XBee wireless module. There will be a matching XBee receiver on the robot. My idea is to use this to control Robo-One type walking robots, because they have so many modes/motions/etc. The screen will be used to make a menu to make it easier to select different motions and suchlike.

So... I'm learning to program the Gameboy.

Here is a screenshot of my first program. It moves a crosshairs around on the screen via the Gameboy DPad (directional) buttons. Pretty fun stuff for a fine Saturday morning (if you are a geek, of course).

I'm using the HAM development environment and the VisualBoyAdvance (VBA) emulator running unders Windows XP. I'm learning from this excellent free book: Programming the Nintendo Game Boy Advance, by Jonathan Harbour, www.jharbour.com.

Borders & Templates in Autodesk Inventor

18 June Thursday

Made border for use in Inventor drawings. So much harder than AutoCAD. Made it into a template you can select just like ANSI(mm).ipt or ANSI(inch).idw.

Walking Make-E

Sunday 7 June 2009

Robot Lives!

Midnight Monday 25 May Memorial Day

Makey Robot moves forward and backward after 10 straight hours of work today.

Jeronimo's Mad Science Robot

Bristling with menance, the balloon-popper mechanism stands by for action.


A robot you would not want to meet in a dark alley.


Mechanisms include worm-drive gearbox and turntable gear.


I did not make this, but I wish I had. Jeronimo Hernandez Conde is the mad scientist.

Focus

Joe Robot gets focused prior to his championship match.

Elephant is FINISHED

Wed 6 May 2009

Heffalumps just rule...


Do's and Don'ts

• Don't attempt to make things bigger than the vise. Multiple parts on multiple pieces of stock is a major pain.
• Must leave more than one diameter clearance -- you need 2 diameters or 1.5 diameters
• This means your raw stock is reduced in size by 2 * diameter of the endmill all the way around, in this case, you lose a quarter inch of the entire perimeter of the stock. (1/8" endmill)
  
• You cannot contour pointy things
• Do not draw radii that are smaller than the endmill
• The radius on all transitions has to end up being greater or equal to the diameter of the endmill
• Don't use a drawing program that exceeds the CAM program you have -- it doesn't understand polylines, splines, etc.
• It's quicker to get another piece of stock and use the manual mill to prepare it to size than it is to spend hours looking at the screen trying to get all the pieces to fit. Rotation is really not quick in CAD.
• It doesn't work well to draw it big and then scale it down, this is where I got into trouble with all the radius problems
• KEY -- To check if the part will be able to be countoured in the CAM program -- here's whatcha do -- you offset it the diameter of the tool. Radii that are too small will fail to offset.
• I think it would have been faster in the end to pick an endmill size, pick a stock size, and draw it freehand in the CAM program.
  

This elephant became an albatross around my neck. So glad it's finally done.

Just ain't feelin' this tab...

Monday 4 May 2009 4:00PM

... so I ripped it off.

Damn, this thing is strong like a TANK.

Tab was in the way. Couldn't get the batteries or PCB by it. Test-installation of angle brackets.

Things your CAD program didn't tell you... Also totally SUCK is that the 2x2 batteries DON'T FIT because they hit the 4-40 nuts from the motor mount screws. That extra 0.2 inches was supposed to let those batteries fit. So now the motor to move the sensor doesn't fit either, because I lost 1/2" or so to the batteries.

44 hours of mad science in three days

Sunday 3 May 2009
4:00AM

And here is the result.














Not bad.
Started Friday evening and finished late Sunday night/early Monday morning, including an all-nighter.

Bolted motors in and made wheels

Sunday May 3 2009
10:00PM - 2:00 AM

I drilled/filed the mounting holes for the motors and got the motors bolted in.


I then used the LEGO rims and tires and drilled the hubs to mate with the LEGO. BUT, it didn't work, because the nut sticks out too far. Solution would be to tap threads into the hub. BUT, I already drilled the hole too big, plus, I don't have an 8-32 tap.

And, I'm on a mission to GET THE WHEELS ON at all costs, SO, I made different wheels.

I made wheels out of wood using a hole saw.

Calliope PCB Works the First Time

HOT DAMN!!!

Sunday 3 May 9 PM
Applied power to PCB and away it went, playing a tune...

Built robot body

3:00-7:00 PM
Sunday 3 May 2009

Made a really awesome box and cover for the robot body at Steamboat Ed's shop.

Final Virtual Model of Robot

2:00
3 May 2009

Final configuration of robot. Spent hours trying to shave off 0.2 inches. Really would like robot to be 2.8 inches square (I mean, cube). Finally settled on 3.0 inches though I really hate to have to give up those 0.2 inches.

Virtual Assembly

3 May 2009

It was a lot of work to model those parts, and at one point I wanted to throw my computer through the window, but now it seems worth it. The fun part is dropping all the parts onto the screen and moving them around.

Better Bodies

3 May 2009
Sunday Mahnin
Drew up the robot body the way it will actually be made. Learned about corner flanges in Inventor. Wow, this is really cool.

Robot On...

Sunday May 3 2009 2:00 AM

Model of PING))) Sensor

Saturday 2 May 2009 11:43 PM

Model of PING))) Ultrasonic Distance Sensor

Model of Tire

Saturday 2 May 2009 11:14 PM

Rough model of tire

Robot Design Day 2

Saturday May 2 2009

AM - Finished designing, on paper, what the robot's exterior will look like

Afternoon - Rounded up some hardware and looked for parts for the skidder

Evening - Started creating 3-D solid models in Inventor

Here is the model I made of the motors I plan to use.

Learned to BEND METAL !!!!!!!!!

Friday May 1 - Afternoon

I am so stoked!! Bruce from Dorkbots showed me how to use the finger brake to make a metal box! Evil cackle, rub hands with glee, I am now the master of the universe, bwahahaha! He's created a monster. This means that I can MAKE ROBOT BODIES really easily! Really nice ones. I am so stoked. I have been puzzling over the mysteries of sheet metal for many moons and along comes this really nice guy and not only shows me how to do it, but actually has the patience to actually stand around while I fumble through the entire process!! Wow! Thanks a zillion, Bruce, I owe 'ya. And thanks to Steamboat Ed and his freakin' fantabulous shop.

Here is the box I made.

Tools: Shear, notcher, Whitney punch, finger brake.

This is so awesome I am inclined to create a Instructable or something showing others how to achieve this miraculous result. Well, perhaps if I lie down for a while, the urge will pass.

Balloon Popping LEGO Robot

Friday May 1 2009 - AM














Jeronimo and I started on our robot for the balloon-popping maze today. I made a destructo weapon to pop the balloons. It's 4 pins pushed through a LEGO tire and then geared a little bit fast. Too much fun!!

Programmed Hardware

Thursday Night after work April 20 2009

Ha! Programmed all three circuits and they pretty much worked the first time. Can I wire, or what? Presented to Steamboat Ed at the Dorkbots meeting, and we decided to go with the thumbwheel, or DigiSwitch, whatever you call it. These things are my new favorite input device.

Wired prototype circuits

Tuesday night 28 April 2009

Finished wiring up 3 test circuits for next version of Steamboat Ed's Calliope. Total time = 4 hours.

DIP Switches - Use DIP switches to select songs - practice your binary numbers. Steamboat's idea -- but let's give him some more options...


Thumbwheel - My Favorite - Just dial in the song number you want



Up Down Button with 7-Segment LED Display - Push up or down to increment/decrement song number. Song number will display on 7 segment LEDs. (2 digits)


Damn good fun.

Next step - programming.

lost parts OH SO FRUSTRATING

Saturday 25 April 2009
I have lost the *@#! slide spring for my carburetor. Looked everywhere and even went back to work to see if I left it there. Can't figure out how a four inch spring could go missing.

Well, other than that SLIGHT detail, it's reassembled.

LEGO robotics - whittling down our time

Friday 24 April 2009

Worked on LEGO robot for "Pit of Despair" contest. Or I should say, watched Jeronimo work on the robot. 'Cause he's the man. 10-4 or so. Knocked some hella time off, we got like ah twenty seconds faster through the Pit of Despair.

moto/metal/PCB

Thursday 23 April 2009
AM - Took my carburetor apart, cleaned it, blew out all the jets.
Drained all the gas. It really stinks.
Day - Cut out gears at work.
Eve - Steamer has soldered most of the components into the PCB and it looks pretty cool.

Puzzle pieces at last

Wednesday April 22, 2009

Beautiful. Chips flying.
Hot off the press -- I mean, the mill.

Here's one after being cleaned up.

Fail Puzzle

Monday 20 April 2009

Finally got two puzzle pieces laid out, programmed, and cut -- alas, fail. Accidentally cut through the pieces with the toolpath and didn't notice it on the screen.

Haste makes waste...
(but I still go as fast as possible)

Makin' Bolts

Sunday April 19, 2009

Worked on my motorcycle. Hasn't run in 2 years. Bought/charged/installed battery, then started working on the rear brake mounting.

Somehow these bolts went missing and I need them for my motorcycle. Was going to order the proper thing and then it occurred to me I could "make do" by chopping off and then drilling a hole in a similar bolt. Need two bolts with particular shoulder and hole drilled for a cotter pin.

Motorcycles are particular, boy oh boy, the shoulder on the bolt fits exactly width wise and length into the brake drum bracket. So, it's NOT a permanent fix, and boy my old boss Charlie Craig would NOT approve :)

Before - Proper bolt in foreground, donor bolt in background


After - Hacksawed and drilled and looks pretty close, though shoulder diameter is too small.


Installed on the bike (photo only shows one of them).

Jank Mechanic's Rolling Chair

Sunday April 19, 2009

1 set casters, plus piece of wood, plus milk crate, plus cushion, plus shop rag = worst looking mechanic's seat ever. Beats just milk crate by itself, though.


Installing casters.

BinkyBot

Saturday March 18 2009

Now that the great electronic reorg is complete, I can have some fun actually doing electronics. I did a rebuild on an old robot which I made back in 2001. The breadboard was torn up so I rewired and reprogrammed it. This is maybe the second robot I built from scratch. I have maybe one or two more robots like this that I would like to get running again.

Robot in disrepair.















Where old robot code lives.
This is my old computer, a Toshiba Libretto. Still works and was able to plug right in and program this robot.