A method of modulating magnetic properties of a magnetic film, and new magnetic devices that utilizes the method are set forth. The interconnected drilling rig is placed on top of matting. The present invention also relates to the use of the apparatus in the automated manufacture of a contact lens, in particular a silicone hydrogel contact lens. The pulley is in communication with the motor output for receiving the rotational energy developed in the motor. A secondary path of the noise cancellation system is identified in an on-line manner in the secondary path module. The wait_for_condition command in this case enables a user to wait for any desired conditions and respond with higher priority in the program flow.