Spot Mini-Micro

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Introduction: Spot Mini-Micro

About: DIYwalkers shows how to make highly functional mechanical walkers via LEGO prototyping and computer simulation.

Single DOF walkers can be a great introduction to some fundamental principles of robotics, like Mechanical/Structural Engineering, Kinematics, Programming, Bio-Mimicry, and Problem Solving! But walkers are often too complicated or require too many parts for many classroom settings. This project's simplicity addresses this, but simple does not mean dysfunctional, and this 4-bar linkage was optimized to walk smoothly either passively (being pushed/pulled) or actively by driving the legs with motors.

Step 1: Part List

Step 2: Frame

Step 3: Build 2 Right Legs

Be sure to use frictionless pins for joints designed to move!

Step 4: Build 2 Left Legs

Step 5: Attach Legs

Step 6: Add Chariot

Make sure the height of the chariot is equal to the height of the robot's frame or it won't walk well!

Also, if the axle connections to the 1x4 thin cranks tend to fall off, then try doubling the crank's thickness by using two 1x4 thin parts on each side, as was done in the above "chariot" video on the treadmill. NOTE: to ensure the correct spacing of the leg parts this may also benefit from adding another yellow half bushing between the frame and each legs' shoulder joint (AKA the "rocker's" connection to the frame)

STEM Contest

Participated in the
STEM Contest

1 Person Made This Project!

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7 Comments

0
ron484eb.rb
ron484eb.rb

Reply 1 day ago

That's awesome thanx .. I have a rechargeable motor from a mini robot .. it's Lego but it's not Lego.. do u know what I mean .. I will try it out and see what happens

0
wadevag
wadevag

Reply 1 day ago

great!

0
wadevag
wadevag

Answer 15 days ago

Yes....but functionality will depend on how you add the motor. Do you mean to drive the legs with a motor, as opposed to the motorized chariot example I shared? Balance could be an issue if no wheels and only 4 legs. 8 legs would solve balance issues. I have a 4 leg hack that balances somewhat...do you want me to share it?

0
jessyratfink
jessyratfink

4 weeks ago

Looks great! Do you have a part list you could include? :)

1
wadevag
wadevag

Reply 4 weeks ago

Sure thing - I'll add it to the Supply section shortly - thanks so much for pointing that out!