Page 169 - Sensors and Control Systems in Manufacturing

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Cha p te r
T w o

FIGURE 2.139
Detection of
residual resin.

• Detection of residual resin in injection molding machine. When
the sensor heads are such that the optical axis covers the
surface of the die, any residual resin will interface with this
axis (Fig. 2.139).
• Measurement of travel of camera lens. A separate sensor can be
installed without interfering with the camera body, thus
assuring a highly reliable reading of lens travel (Fig. 2.140).
• Measurement of rubber sheet thickness. With the segment func-
tion that allows the selection of measuring points, the thick-
ness of a rubber sheet (i.e., the distance between the rollers)
can be easily measured (Fig. 2.141).
• Measurement of stroke of precision table. Detects even minute
strokes at a resolution of 0.05 μm. In addition, the AUTO
ZERO function allows indication of relative movement
(Fig. 2.142).
• Measurement of plasterboard thickness. A sensor head is placed
above and below the plasterboard, and its analog outputs are
fed into a digital meter relay. The meter relay indicates the
absolute thickness value (Fig. 2.143).

FIGURE 2.140 Measurement of the travel of a camera lens.