when i grind with my code 2 it binds idk why
Your bearing has probably gone a bit responsive. If you hop it up from a sleeper to waist height, dies the string “chase” around the axle at all?
Either way, a quick cleaning rarely hurt anyone.
My advice is to hold the string, or to do the grinds from a trapeze. If you “guide” the string so as to not allow any slack, this problem will cease. However, it may be an issue like GregP said, where the bearing might need cleaning or something of the sort.
When this happens to me, I just take the bearing off and blow on it forcefully.