1-4 BenchMike Pro 2025/2050 & Z-Mike Pro 4025/4050 Instruction Handbook: Introduction
1.4.1 Sources of Error
Please note that any motion of the part, while in a fixture or not, can induce measurement error.
Be conscious of the following potential sources of error during measurement.
Dust or film on the measured object will produce measurements greater than the actual size. Wipe oily or dusty
objects with a cloth before measuring them.
Dust or contamination on the transmitter or receiver scan window will also
produce incorrect measurements. Follow the cleaning procedure de-
scribed later in this manual as part of a routine maintenance program.
Incorrectly placing the object in the measurement area will also produce
incorrect measurements. Place the measured object perpendicular to the
scanning laser beam, and avoid tilting the measured object vertically with
respect to the scan path. The greater the object’s angle, the greater the
measurement error.
Temperature variations (see Troubleshooting section in the Operator
Guide) will cause expansion or contraction of the part. Accurate temperature measurements are necessary to
compensate for changes in product size.
As an object moves within the measurement area, certain errors will become more prominent, depending on the
direction and magnitude of this motion. In general, measurements are less affected by motion along the Scan
Centerline than by motion along the Pass Line.
1.4.2 Measuring Transparent
Products
The BenchMike Pro can measure transparent products when
a Transparent Object Measurement type (Types 51, 52, and
53) is selected. See section in Setup about Measurement
Types for more information. Note that these measurement
types are not available on all BenchMike Pros.
Although an opaque product blocks laser light across its en-
tire diameter, a transparent product allows some laser light to pass through.
Since the BenchMike Pro determines product size based on the sharp increases and decreases in gathered laser
light, it may incorrectly determine product diameter for transparent products unless Transparent Object Measure-
ment has been installed.
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