I will just use this thread instead of making a new one.

My dad is about to start making his robot and is wondering what speed controllers to use.

He is using 4, 18v drills and we were told by robot power that the scorpion XL would not handle them. Would running 2 scorpions be ok?

if not what speed controllers would be the best option?

Also my dad has just asked me what would be the most powerful drive, 4, 18v drills or 2 gold motors?


Will