Olympus Magna-Mike 8600, User Manual

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DMTA-10026-01EN, Rev. D, January 2015
Chapter 4 68
4.5.1 Standard Target Balls
Standard target balls are used for most general purpose applications. Selecting which
size of target ball to use greatly depends on the application geometry and the
maximum thickness to be measured. In general, you should try to use the largest
diameter target ball that will roll freely for the application. The ball must be able to
make contact with the inside surface in a cornered or contoured area.
Consider the following criteria when choosing a ball:
• Minimum curvature of the material
• Maximum thickness measurement
• Accuracy needed for measurement
• Compressibility of the material (larger or magnetic balls will compress the
material more than smaller or non-magnetic target balls)
• Surface hardness: Magnetic target balls will slide along the surface unlike the
non-magnetic target balls that roll. The user should uses caution when using
magnetic balls to ensure that the surface of the material will not be scratched
by a magnetic target ball.
1.59 mm (1/16 in.) diameter target ball (Olympus P/N: 80TB1 [U8771030]): Useful for
applications that involve intricate contours. While the small size is efficient for
measuring difficult shapes, it is less accurate than the 3.18 mm (1/8 in.) ball and has a
restricted thickness range up to 2.03 mm (0.080 in.) with the standard wear tip.
3.18 mm (1/8 in.) diameter target ball (Olympus P/N: 80TB2 [U8771031]): Serves all
standard applications, such as plastic blow molding, simple shapes, and wall
thicknesses up to 6.10 mm (0.240 in.) with the standard wear tip.
4.76 mm (3/16 in.) diameter target ball (Olympus P/N: 80TB3 [U8771032]): Useful for
applications that require better accuracy, or where the material is thicker than the
range offered by 3.18 mm (1/8 in.) ball. The maximum thickness range is up to
9.14 mm (0.360 in.) with the standard wear tip. However, the ability to measure
intricate corners is limited, and soft materials are more likely to be compressed using
this target ball.
6.35 mm (1/4 in.) diameter target ball (Olympus P/N: 80TB4 [U8771033]): Useful for
applications that require a larger thickness range and where the contour of the
material will allow a 6.35 mm (1/4 in.) diameter ball to roll smoothly. The maximum
wall thickness that can be measured with the 6.35 mm (1/4 in.) target ball is 9.14 mm
(0.360 in.) with the standard wear tip. However, the ability to measure intricate
corners is limited, and soft materials are more likely to be compressed using this
target ball.