In today's class, I followed the advice of my Nuvu coaches and made more extensive research on stepper motors. First, I searched for lighter versions of the stepper motors that could still provide me with enough power to move my robot. When I found out that a stepper motor (42x38cm) could lift up to 2.4 kg of weight (see video below) and could lock itself in place better than the servos, I was convinced that they would be well fitted for what I want to accomplish.  Among the stepper motors I found, I chose to use the NEMA 17 model that weight 285 grams.

Next, I enlarged the leg dimensions from 8.5cm to 10cm to create a bigger robot meant to accommodate the larger stepper motors. I also decided to change the building material for the legs from wood to acrylic. I found out that metal screws wore wood very quickly, which meant that screw holes that were meant to fit the screw would be expanded, hence creating space for the screws to wobble.

Next class, I plan on studying how to control stepper motors efficiently while I wait for the motors to arrive. I also plan on assembling more legs in advance to save time.

- About stepper motors and other types of propulsion: https://www.hackster.io/taifur/complete-motor-guide-for-robotics-05d998

- On the capabilities of the stepper motor:

https://www.youtube.com/watch?v=kFzrrzmT_LY