You need leverage to drill. You have to push down a bit on whatever you are drilling into, which will push you away from it. So, until you drill in enough to ge

You need leverage to drill. You have to push down a bit on whatever you are drilling into, which will push you away from it. So, until you drill in enough to get leverage on the target, you've got to either counteract this force, or keep extending your drill arm as you drift away.