Methods and voltage controlled oscillator designs that compensate for errors. The rotation block includes a rotation surface rotatable around a rotation axis, and the fixed block includes a first surface and a second surface opposite to each other and a shaping surface. An uncured artefact is formed from a core or substrate and the pre-preg, which provides a skin, and is cured. The controller transmits signals to at least reduce the speed of the motor when a bag count limit is reached for a respective denomination. Each of the plurality of restricting passages corresponds to a column of corresponding supporting holes and a column of corresponding through holes. As the rolling shutter progresses down the array, each row is hard reset multiple times before its integration period begins, thereby ensuring that the row is in a true hard reset condition at the beginning of its integration period.