An angular velocity sensor is described with improved ageing and hysteresis properties. The liquid crystal cell may be manufactured simply in a consecutive manner using a roll-to-roll process. The orbit nip roller assembly includes a primary and secondary roller defining a roller nip which lies substantially parallel to the input and output feed paths. The impact generating module is fastened to the plate to apply an impact to the plate and actuate the plate along the first direction, the second direction and the third direction independently.