Measure single point and edge dimensions
Since the TM-3000 Series measures outer diameter based on a 2D image, and can provide information on the target inclination. Based on this information, it can measure outer diameters while correcting the inclination automatically.
If the target inclines, the scanned diameter becomes larger (The gray curve in the graph on the right), resulting in improper measured values.
An area is defined based on the captured image. Calculating the average of the diameters within the area minimises the error caused by surface roughness during measurement.
When a target with a rough surface was measured, the measured value fluctuated depending on the measurement position, resulting in greater error.
You can obtain measured values by just specifying an area around the target section on the captured image. Unlike conventional micrometers, the measurement can be completed without the troublesome process of changing the target position or preparing a moving mechanism.
The only way to measure outer diameters at narrow intervals was either by 1) changing the target position or 2) scanning the target. Measurement took more time and effort, and incurred more costs due to jig maintenance
Just selecting measurement points from the captured data allows measurement. The measurement of the deviation at multiple points can be perfectly synchronised and conducted at once, resulting in significant reduction of cycle time.
The time required for the measuring of multiple points was expressed as: Number of measurement points x Rotation time, and also required time to move to the measurement points. Consequently, a 100% inspection was impossible.
The position correction function allows outer diameter measurement
at a fixed distance from a specified point.
Correcting the position displacement or inclination of the target enables quality evaluation on an actual production line.
Conventional micrometers required the preparation of a special jig which aligns the target for measurement. Accurate measurement was difficult because the measured value varied every time due to position variation.
Effects of inclination can be corrected during measurement when
calculating from 2D data. Both height difference and
outer diameter can be measured with one sampling, allowing inline measurement.
After the reference point was measured, the target was moved to measure the point of different height. The system required a moving mechanism which caused problems such as accuracy issues and higher cost. In addition, accurate measurement was difficult because the resultant value became larger when the target inclined.
Measurement is conducted at once using the entire image, and the maximum diameter can be determined from the result. Since the maximum value can be specified from the entire image, measurement is not affected by errors resulting from the use of a jig.
The conventional micrometers scanned the target and then determined the maximum diameter from the scanned data. The measurement took more time, or was not accurate due to the influence of the accuracy of the jig.