Abstract: An objective according to some embodiments is to minimize the consumable materials needed to conduct a chemical or biological process. An objective according to other embodiments is to take full advantage of capabilities offered by a motion stage. An apparatus may include a motorized traverse, a flow controller, a tip-mount traverse, and a tip, and may also include a motion of a tip past an influencer or a motion past an actuatee. An apparatus may include a floss, a floss-advancing reel, a floss wetter, and a tip cleaning region. An apparatus may include a motor, a rotor having an eccentric bearing hole and taper that leads to the bearing hole, and a vibration damping element that acts on a surface region of a tip inserted into the eccentric hole.