Monday, March 28, 2011

The Monkey Bike Escapades

Last weekend I went to the 7-mile garage sale in Arnaudville, La.  At this event, I came across the most ridiculous bicycle.

OOoo!! Let's put a motor on it!!!

After a quick test...

on the way to the circus

I realized I had to have it, so I offered the owner a reasonable $5 and rode off into the sunset.  



Getting it home, I immediately realized that the pedals just were not going to work for me.  I thought to myself that I recently took a motor and transmission out of... something.  And then it hit me, I only had to weld a bracket then I'd be riding my mini bike to all the parties (or more than likely embarrassing myself in front of my neighbors).

I began by clamping the bike to my awesome table and took some parts off.


pedals are for suckers
I was wearing this shirt when I started

















Then I tried to add a MUCH bigger spring by cutting off some parts, this helps to support my excessive body weight.

Awesome
Suppose I'll cut off the taped bit



Next up was cutting and welding a bracket for the motor.

mark...
and cut.





Then making an actual motor mount

placement is key
high precision paper template





transfer the template to scrap metal
cut, then test fit


Weld it all together...

held in place with magnets
then with my awesome (terrible) welds


After a bit more fiddling around to get everything together, including some soldering and other boring stuff, I had a complete (well, all the pieces are there anyway) electric runt bike.

look how sexy.


This thing was fun to build, a great way to spend a Friday night at least.  With my modifications I was able to reach a whopping top speed of 6 mph, which is completely unimpressive.  I will probably upgrade the battery system soon, considering that the bag of Black and Decker batteries is utterly ridiculous.  Some PWM digital speed control action and aesthetic consideration is definitely in order.  Maybe next Friday, but more likely I won't be working on this until my thesis is finished.  

Until next time,

Pleasant Prototyping.

Monday, March 14, 2011

I had an extra saw, so I took it apart.

This Black and Decker Firestorm circular saw has been sitting in my pile of collected objects for quite a while.  I picked this up from a damaged clearance rack at a hardware store, it was $20 because it didn't come with any accessories.  Anyway, I finally decided that I wanted to harvest the motor, gearbox and any switches from within it.

Here is a quick deconstruction, complete with silly captions.

Step one:  Have this saw

Time to start removing parts


Blade guard off, its getting dangerous!



Mmm, #1 and #2 Phillips screws


Crack open the shell to reveal...

 a laughably tiny motor in a plastic sleeve (for girth, I imagine)
Ah!  Dangly parts!

What a satisfying Saturday night.

And thats what inside of a cordless circular saw looks like, a battery terminal, a switch, a motor and a gearbox.  Nothing spectacular, but I still like to appreciate the effort put into the design of all these  parts.  The gearbox in here is destined for great things, but that is a topic for another post.  All thats left to do is to separate these parts by category and add them to my parts stash (insert: Muahaha).

Tell me in the comments if you enjoyed this, thanks!


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