When attempting to measure warpage and flatness, you should consider the measurement system being used and the environment where it’s being installed. Always select the right type of equipment during this process. Selecting the wrong kind of equipment can lead to increased man-hours during the production process and insufficient precision.
How to Measure Warpage and Flatness
Flatness Measurement of Chassis
To measure warpage and flatness, you have to determine the difference in height attained by several sensor heads at different locations on the part. In this instance, you won’t experience any measurement errors that are typically caused by chattering because the sensor heads do not move. Because the sensor heads remain stationary, inspection cycle times are much quicker. You won’t need a mechanism to move the sensor head.
Warpage Measurement of PCBs
In this instance, the sensor or target must be moved. The data collected at each measurement location will be used to calculate warpage and flatness. To keep costs down, only one head is used. Measurement errors can occur because of chattering. You will need to invest in a mechanism to move the sensor head.
Warpage measurement of material edges
In this case, a laser line is reflected from the target surface. You can measure warpage by ascertaining the height differences on the profile that is reflected. You don’t have to move the sensor head to measure warpage.
2D Shape
When trying to determine the best way to achieve profile measurements, keep a number of important factors in mind. These include the type of measurement system you’ll be using and the installation environment where the system will be installed. Always select the right type of installation equipment, or you may have issues such as obtaining improper precision during the measurement process and an increase to man-hours during production.
How to Measure 2D Shapes
Profile measurement of aluminum fins
You can obtain shape measurements by moving the sensor or target head to gain the height data. If you’re looking to obtain the highest precision when measuring shapes, use 1D laser displacement sensors as opposed to 2D laser displacement sensor. You will need a mechanism to move the sensor head and/or target. Keep in mind that measurement errors can occur due to vibrations when the sensor head or target moves.
Profile measurement of tire tread grooves
The cross-sectional shape of locations that are hit by the laser can be found. Stable detection is very much possible due to high-speed sampling, even in instances where the workpiece moves. It’s not required to move the sensor head and target to measure shapes. When measuring large targets, you can obtain a measurement by installing multiple sensor heads.
3D Shape
When trying to figure out the best way to obtain the measurements of 3D shapes, you should keep a number of important factors in mind that include, the type of measurement system that you plan on using and the installation environment where you’ll be installing it. As always, selecting the right kind of measurement is vital. If your equipment doesn’t meet your needs adequately, you may have to deal with insufficient precision and increased man-hours during the production process.
How to Measure 3D Shapes
Profile measurement of connecting rods
You can construct a 3D shape by obtaining and superimposing more than one cross-sectional shape over the locations where the line laser hits. The in-line measurement of the shape in its entirety is attained with the fastest sampling speed in the world.
Profile measurement of solder
You can achieve a high-precision measurement of a 3D shape by combining a 1D laser displacement sensor with an X-Y stage. You can use the sensor heads selectively to measure shapes of varying sizes. You can also measure the shape of transparent 3D targets.