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Program robots using technologies created from industry experts. ARC is our free-to-use robot programming software that makes features like vision recognition, navigation and artificial intelligence easy.

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You didn't take the lesson, no soup for you!:)
I think the articles complement each other well. Yours is more comprehensive, theirs is an easier to digest quick overview. I found some of the comments more interesting than the article though.

I didn't see anything in the servo tutorial about if you could control the speed of a servo on a EZ Robot robot. Are they set to operate at a set speed in the programming or can you speed up or slow down the servos?
You can control the speed in scripts and in most objects that use servos.

Thanks for your reply Alan.