Технология измерений
Технология измерений
MarForm Software MarWin
RU
Характеристики изделия

Application: Bar-to-bar height evaluation on commutators


For use in conjunction with MarForm MMQ 100, MMQ 200, MMQ 400, MFU 100, MFU 110 WP, MFU 800, MFU 8 Retro, MFK 500 and MFK 600, with MarWin 4 or higher evaluation software and EasyForm, AdvancedForm and ProfessionalForm
Функции


Software package for analysis of bar-to-bar height on commutators Bar-to-bar height refers to the difference in height between the various bar segments on a commutator. This bar-to-bar height is a contributory factor in wear of carbon brushes and brush fires in electric motors.

Using this software package it is possible to use MarWin analysis software with roundness measurements obtained from MarForm measuring machines in order to investigate and assess bar-to-bar heights.

Four calculation methods are provided for the evaluation of two neighboring bars (maximum bar-to-bar height):

Bar-to-bar height: Center of bar
  • Difference in the radii measured at the respective centers of two neighboring bars. The centers can optionally be expanded to ranges by entering their size as a percentage of the bar width; all radii are then averaged over this range.
  • Bar-to-bar height: max./min. radius
  • Difference between the respective maximum and minimum radii of two neighboring bars.
    Bar-to-bar height: Difference between max. radii
  • Difference between the respective maximum radii of two neighboring bars.
  • Bar-to-bar height: End of bar–start of bar
  • Difference between radii of two neighboring bars, measured at the end of one bar and the start of the next. The end and start points can optionally be expanded to ranges by entering their size as a percentage of the bar width; all radii are then analyzed over this range.

    The results evaluated are the values of the individual bar-to-bar heights and their mean values. The form deviations of the commutator are also recorded (individual roundnesses, corresponding mean values, overall roundness), as is the radial run-out.

    Simple parameterization:

    A drop-down list in the dialog box is used to select one of the bar-to-bar height definitions given above. The size of the averaging range can also be defined here if possible/necessary. Size is specified as a % of the width of the bars in question. User-defined tolerances can be specified for the attributes of the individual bar-to-bar heights, the individual roundness deviations of each bar, the overall roundness deviation, and the radial run-out deviations. If these are defined, then the attribute values will be shown in the results table with a colored indicator to show whether they are within tolerance. For the radial run-out deviation, both the C-axis of the form measuring machine and a predefined datum element axis can be selected.

    Comprehensive results table

    The results table lists the characteristic values from the analysis. The following are documented:

    Bar-to-bar heights
  • Values of bar-to-bar heights with tolerance exploitation display (optional)
  • Corresponding angle positions
  • Colored indicator for maximum value
  • Mean of all bar-to-bar heights

    Form deviations
  • Values of roundness deviations with tolerance exploitation display (optional)
  • Corresponding angle positions
  • Colored indicator for maximum value
  • Mean of all individual roundnesses
  • Overall roundness deviation, RONt

    Form and position deviations
  • Radial run-out deviation referenced to datum axis (workpiece axis) or C-axis of the form tester