hello. Everyone, I am a student who has assembled AR4 for the first time.
I wanted to know how ar4 works, so I studied Annin's YouTube channel.
I found out that the dh parameters of ar4, ar3, and ar2 are different.
https://anninrobotics.com/wp-content/uploads/2025/08/I-want-to-know-dh-parameter.avif
https://anninrobotics.com/wp-content/uploads/2025/08/I-want-to-know-dh-parameter_2.avif
https://anninrobotics.com/wp-content/uploads/2025/08/I-want-to-know-dh-parameter_3.avif
Can you tell me why the link length items for ar3 and ar4 are slightly different?
