Goal is to create a robotic arm with a precision of 0,5mm - 1mm, with a limited budget, basic parts costs somewhere around 100-200€. Another main goal is to learn about mechanics, and try out various mechanical designs (e.g. bevel gear drive, pulley & belt drive, gears, counterweight, ball & thrust bearings etc.).
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/learning-while-building-a-cheap-and-precise-robotic-arm