FeatureCheck Analysis 1.1





FeatureCheck is a feature based machine tool deviation analysis software. It can process cross grid encoder, double ball bar and co-ordinate measuring machine (CMM) measurements. Software gives values for quality capability and estimations of specific deviations in a machine. All the results are stored in a database, which can later be used for follow-up purposes.

Cross grid encoderAll the measurements are analysed devided in features, which makes it possible to use several different measuring devices:

Program uses arcs, vectors and positionings to represent measurement path. These paths can be either built by an own path editor of the program or they can be read directly from a measurement file or even from a design file of a work piece.

Measurements are shown to a user in a graph, which has the difference to a target path magnified. This makes it easy to interpret results visually.

Graph viewSpecific deviation types calculated based on the measurement are shown in an illustrative bar diagram. This shows right away the most severe deviations in a machine tool. Each deviation type has an own page in a results window to tell more detailed information of the current deviation. 

Program distinguishes the following deviation types:

  • Backlash
  • Cyclic error
  • Lateral play
  • Scale error
  • Servo mismatch
  • Servo lag
  • Squareness
  • Straightness
  • Vibration magnitude and frequency

Pareto diagram

Quality capability of a machine tool is described by three different values:

  • Circularity
  • Straightness
  • Positioning accuracy

Program prints out a measurement report, which consists all the magnitudes of deviations and quality capability values. It also shows a measurement graph, used features and their parameters. This facilitates documentation of measurements and gives a clear picture of condition of a machine tool to a customer.

Different kind of measurement paths have different possibilities to reveal all the deviation types. Program can find out this capability to each measurement path automatically.

Measurement and analysis results are stored in Microsoft® Access™ database. Results can later be retrieved from this database for a second time observation. Database is also a basis for long term follow-up of machine tools.

User can follow quality capability and deviation types of each machine tool saved in the database. He can either just observe changes in condition of machine tool itself or point out differences between measurement methods. Results are shown in a graph and in a table ordered by time.

FeatureCheck Analysis speeds up and focuses processing of machine tool measurements. It uncovers new possibilities in cross grid encoder and CMM measurements: Cross grid encoder measurement can replace time consuming test piece measurement in some cases giving a lot faster feedback to user. Analysis of work piece measurements can on the other hand give continuous feedback of the condition of a machne tool and so give more time to perform necessary actions before any defective parts are produced. In all FeatureCheck shortens total measurement time and still gives more accurate and specific results than before.


Download a thesis Method for Analysing Planar Machine Tool Measurements (20.9MB) that describes algorithms and achieved test results.