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During the assembly of a pcb the operator is now guided in the selection and placing of components on the board by two separate beams of light. One is used for tracing x and y axes on the board to give component location and the other, which is brought into use by a signal from either the foot pedal or by a pushbutton location on the keyboard, is switched on and projects a spot of light on to the appropriate component bin. Each Trescomp assembly station can present up to nine different component bins on the panel facing the operator at any one time. There is, however, a choice of panels which permits a presentation of up to a maximum of 17 bins.
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Noise control in the design stage is more effective and less costly than retrofitting; but it is very important to know what to do. An understanding of noise generation is essential in order to control noise in the design state. There was much discussion regarding the general inadequacy of the perfo