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Stair Climber II

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This is the second of two robots I've built that can climb the stairs in my house. It is the faster and more efficient than the first, so I call it number 1.

Click on any of the images to see a larger picture.

The sequence of images below shows how it works.

Here's a movie of it working:

Here's a movie of it climbing all the way to the top of the stairs in my house:

Here's a movie of it racing my other stair-climber to the top of the steps in my house:

Here are some closeups:

The gearing mechanism that drives the wheels:

The gearing mechanism that moves the body up and down the vertical rack. The gear train that drives the wheels on the body is also visible. The last gear in that gear train engages one of the gear in the wheel-drive mechanism, so that all the wheels are powered when the body is at the bottom of the vertical rack:

The touch sensor that detects when the bot's arms are completely on top of the next stair (triggers the bot to stop moving forward, and to start climbing):

The sensor that detects when the ends of the arms are on top of a step:

Pwnstar October 26, 2009, 10:42 am
Do you have the mindstorms program for this robot?
stevey (from somwhere) December 9, 2009, 6:18 pm
cool model i have been trying to make one that climbs my stairs, but all have failed. one fell down and shattered in peices.
have you thought about making instructions for it on the page.
Jalem (from Wisconsin) January 8, 2010, 4:30 pm
Very cool – I made a stair climber with my step-daughter about 5-6 years ago when Mind storms first came out, it was a simpler and slower design than yours but worked very well at climbing but couldn’t go down, ever since I’ve been thinking about making one that could go both up and down stairs. Looks like yours can do that. Can it actually go from the top to the bottom as well from the bottom to the top of your stairs?
christian name (from my home) June 2, 2010, 8:09 pm

Anonymous March 19, 2012, 2:30 am
This es t he most epic thing i have ever seen. Now I am trying to make my own but cant figure it out can you please give some ideas that can travel up stairs using only the pieces that come with the Lego Mindstorm 2.0???
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