Page 167 - Sensors and Control Systems in Manufacturing
P. 167
128
T w o
Cha p te r
FIGURE 2.134 Detection of a missing or doubled packing ring in cap.
FIGURE 2.135 Detection of incorrectly positioned small objects.
• Measurement of tape width. Measures the width of running
tape to the submicrometer level; 100 percent inspection
improves product quality (Fig. 2.136).
• Measurement of sheet thickness. Use of two controllers enables
thickness measurement by determining the distance in input
values. Thus, thickness measurement is not affected by roller
eccentricity (Fig. 2.137).
Automatic machinery:
• Detection of surface run-out caused by clamped error. Improper
clamping due to trapped chips will change the rotational
speed of the workpiece. The multifractional digital meter
relay sensor calculates the surface run-out of the rotating
workpiece, compares it with the stored value, and outputs a
detection signal (Fig. 2.138).
