Guidelines for purchasing contouring instruments

A contour measuring instrument is a precision equipment used to measure the contour shape and cross-sectional profile shape of various mechanical parts. The instrument workbench adopts high-precision horizontal air floating track and rolling vertical track, with high movement accuracy, good stability, and long service life; High measurement efficiency, simple operation, suitable for use in workshop inspection stations or measurement rooms.

The first factor to consider when selecting a profilometer is: the type of workpiece being measured (conventional or unconventional) and its size? What method is used to measure? Analyze what?

1. What is contact based? What is non-contact?

Contact type - a method of collecting data by directly contacting the contour surface of the measured workpiece with a measuring needle;

Non contact - generally composed of laser sensors, white light confocal color difference sensors, CCD, etc;

2. What is a regular type? Or an unconventional type?

Conventional - the contour is relatively obvious or easy to measure, unconventional - the contour is not obvious, microscopic, such as a few nanometers.

Other factors to consider include:

1. What is the height difference between the peaks and valleys of the surface profile of the tested workpiece? (This depends on the choice of sensor: large range or small range?)

2. What are the requirements and uncertainties for measurement? (This depends on the resolution of the sensor)

3. What is the length of the surface contour of the tested workpiece? (This depends on the travel of the drive box - X square)

4. What is the height of the surface contour of the measured workpiece? (This depends on the height of the column - Z-direction)

5. Special requirements for measurement? (This depends on some special configurations, such as whether the tested surface of the product is inclined, whether there are deep holes, etc.)

6. Is there a roughness requirement on the contour of the measured workpiece? (This also depends on the selection of instruments)