Let's Make Robots!

Look No Batteries


Due to the recent interest in oddbots competition what follows are some ideas to help.

I was given a robot (tin-clockwork) recently - which drove forwards for 10seconds on one wind, which got me thinking about an old wax and rubberband Motor i used to make.

So i adapted it to a 10cm tall papercard robot and by winding it up 50 turns it will turn for over 5 minutes - longer than most batteries :-)

 Please Note - the Videos are not time lapsed animations

At the end of the first Video you can see him walking.....

 

 

 

 

 

 

 

"Wild Thing"

Showing Robot version 2

Now with ability to rotate both arms independant of each other.

 

 

 

 

 

 

 

 

 

 

 

 

Very Silent Motors.

(higher quality video).

Not so silent when he cracks his head on the piano.

 

 

 


1robot2paper.jpgWith a trusty "Swiss Army knife"

the pieces are cut too precision.

 

 

 

 

 

 

 

 

 

 

 

2robot2paperassemble.jpg

Glued with stickglue - not exactly too precision.

 

 

 

 

 

 

 

 

 

 

 

 

3robot2waxfill.jpg

Fill the hollow arm rings with wax, making sure the wax forms a bubble like thingy pround of the top.

Then make a hole through the center of the wax and card.

 

 

 

 

 

 

 

 

 

 

4robot2armpull.jpg

 

 

 

 

 

 

 

 

 

 

 

 

 

5robot2straw.jpg

An Elastic band is passed through arms and shoulders and secured with a cut ear-cleaner stick.

You can also see for this model i also threaded the elastic band through a drinking straw - which gives the chest more stability - and you can wind it up a lot more without squashing the ribs and leaving the robot breathless.

 

 

 

 

 

 

 

 

6obot2blownapart.jpg

 

Laughing his head off......

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7robot2candle_wax1.jpg

Next wax Joint is the Hip joint.

Just drip wax and build up a layer 2-3mm thick.

whilst it is still a little warm but set - turn it up side down and flatten it on the table - just so that the surface is a flat as possible.

 

 

 

 

 

 

 

 

 

8robot2keyholesurgery.jpg

Using Keyhole surgery - as we all have multimeter probes .....

the elastic band can be pulled through the whole model.

 

 

 

 

 

 

 

 

 

 

9robot2hips.jpg

Details of hip joint.

 I have now found out that if you make the top surface out of PolyMorph then it gives a much smoother drive.

 

 

 

 

 

 

 

 

 

 

 

 

 10robot2head.jpg

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11robot2headsecure.jpg

 

Secure his spine elastic-band.

arrange it so it cannot rotate.

 

 

 

 

 

 

 

 

 

 

 


12robot2operation.jpg

 

Robot complete ready to be wound up and let loose.

The Robot allowed me permission to make a full body X-Ray just to check to see if everthing was in the right order........

As i layed him on the keyboard (operating table) he raised his arm over his head -------------as if to say "Goodbye World"

 

+""*ç%&/&/()))== - Flash...................................

 

 

 

 

robot2xraybands2.jpg

 

The Xray plate shows the positioning of the Elastic bands and Wax Joint.

 

 

 

 

 

 

 

 

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.
Gimme a few minutes to get it out of the bag and I'll take/post some pics for you. It's not currently in working condition. I must have the construction plans somewhere.
I still have my old meccano set - unfortunately its in my mums attic around 900miles away :-(

A pile of bits

Grabbing Hand Money Box

The "hand"

Grabbing Hand Money Box

What's inside

Grabbing Hand Money Box

Some interesting Quantum mechanics to be learnt from this one.......... thanks the rekindle-ing

That is cool and a great card board job on the bots body. Can we see inside of them for your rubberband motor? I remember those when I was a kid with the rubber bands. Great job. 

Robot number 2 was taken "ill" last night - after me overwinding his mechanism.

- result being he has a strangulated colon (rubberband) which has to be removed and replaced by a minor surgical procedure.

I will document the procedure with x-rays and CT scan - not sure what to use as anesthetic though.

I expect he will recover fast and the full operation will be posted.

Ps The cardboard (photocard) graphics came off a web site (not sure if i can post links here - will check board rules)

I think that you can  post the link to the web.

I've downloaded some free models from http://www.flying-pig.co.uk/

There are also other educative resources explaining mechanisms.

Spam?? this does not look like a bot

This is my first posting so navigating is a little slow and the video that goes with it will show my Robot in all its glory....the youtube processing is a little slow... please stay tuned..

Yes i have a series of robots powered by would you beleive - Rubberbands and candle wax.

They may be slow but they are very cool