Floor panels which are provided with a mechanical locking system including a displaceable tongue in a displacement groove. The drug delivery system includes a holder and a pre-filled drug container such as a syringe which is securely retained in the holder. The mixed signal motor control circuitry is further adapted to perform field oriented control in a second mode of operation. A method for controlling a twist of a tube of packaging material comprises allowing the packaging material to pass through an aperture formed by a number of rollers with a rolling surface in contact with an outer surface of the tube, and adjusting the direction of the rotation axis of at least one of the rollers to control the twist of the tube. The housing includes pluralities of brackets disposed at outer sides of the housing.