Video tutorials -

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Calculate the number of rotations you have to do with the motor to rotate the final small 8 teeth driving gear wheel to 1.25 rotations?

What should you as a teacher know when the students are trying to achieve a program and robot attachment that could reproduce their behaviour 9 out of 10 times. 

If you've done the calculation following the previous tutorials you would arrive at a result of 18.75 rotations. But this is not the correct answer. The calculation is wrong, because the math model that we've built, although kind of obvious, is not correct. When experimenting the correct number of rotations would be 37.5. This is a large difference. Two times larger. Exactly two times large. Something should be happening here - and this thing is "planetary mechanism"

In this video we discuss the durability of the construction of LEGO robots and how do we make them more durable. 

What should you do as a teacher when the students are calculating the gear ratios and number of needed rotations?

Note for the teacher on making the construction more stable, more durable and using beams for this.

Following the principles from the previous video, try to make the attachment that you've built, more stable and durable. 

In the previous video, we found the correct answer for our task and it is 18.75, or is it?