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RFP-5 Analyses: Tire Geometry TG

RFP-5 Analyses: Tire Geometry TG. Runout analysis Filter Shoe 1 Shoe 2 Influence of filters and shoes to the runout result Selection of an adequate filter and shoe Conclusion. 0° ----- 90 ----- 180 ----- 270 ----- 360°. Runout analysis. Definition: Runout.

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RFP-5 Analyses: Tire Geometry TG

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  1. RFP-5 Analyses: Tire Geometry TG Runout analysis Filter Shoe 1 Shoe 2 Influence of filters and shoes to the runout result Selection of an adequate filter and shoe Conclusion

  2. 0° ----- 90 ----- 180 ----- 270 ----- 360° Runout analysis Definition: Runout The runout is the difference between the greatest and smallest clearance between sensor and sidewall in a circumference (lateral runout) or between the sensor and the tread (radial runout).

  3. Filtering over an angle area selectable in advance (at the most 40°) suppresses short-wave irregularities, such as bulges and depressions (on the sidewalls) or tread blocks and gaps between the treads (on the tread surface). Runout analysis Filters unfiltered curve filtered curve

  4. The size of these shoes - to be selected in angular degrees - has a crucial influence on test readings. Runout analysis Shoes It is additionally possible to define „shoe 1“ and „shoe 2“ in like manner as for skatetype mechanical sensors. Shoe 1 serves to suppress spew. Shoe 2 makes it possible to bridge gaps in the tread pattern.

  5. Influence of filters and shoes to the runout result Where to select filters and shoes in the RFP-5 Datamanagement? Please go to „inpection plan_measuring parameters geometry_runout“. Select FILTER between 0° and 40° [values 0...400 (°/10)] Select SHOE 1 between 0° and 40° [values 0...400 (°/10)] Select SHOE 2 between 0° and 40° [values 0...400 (°/10)]

  6. Influence of filters and shoes to the runout result Where to check the runout curves in the RFP-5 Datamanagement? Please go to „statistics and graphics_graphic display of geometry“. Select runout Select the desired track If you select print, you can also see the runout result that was calculated with the new filters and shoes. Select display range Select display

  7. 0° 180° 90° 270° 360° Influence of filters and shoes to the runout result Example 1: Runout curve of a tire tread – using filters 0°, 10°, 20°, 30°, 40° Filter:0° (Shoe 1 = 0°, Shoe 2 = 0°) Result of runout measurement:159mm/100 Filter:10° (Shoe 1 = 0°, Shoe 2 = 0°) Result of runout measurement:139mm/100 Filter: 20° (Shoe 1 = 0°, Shoe 2 = 0°) Result of runout measurement:135mm/100 Filter: 30° (Shoe 1 = 0°, Shoe 2 = 0°) Result of runout measurement:132mm/100 Filter: 40° (Shoe 1 = 0°, Shoe 2 = 0°) Result of runout measurement:129 mm/100

  8. 0° 180° 90° 270° 360° Influence of filters and shoes to the runout result Example 2: Runout curve of a tire tread – using shoe 1: 0°, 10°, 20°, 30°, 40° Shoe 1:0° (Filter = 0°, Shoe 2 = 0°) Result of runout measurement:159mm/100 Shoe 1:10° (Filter = 0°, Shoe 2 = 0°) Result of runout measurement:144 mm/100 Shoe 1: 20° (Filter = 0°, Shoe 2 = 0°) Result of runout measurement:137 mm/100 Shoe 1: 30° (Filter = 0°, Shoe 2 = 0°) Result of runout measurement:132mm/100 Shoe: 40° (Filter = 0°, Shoe 2 = 0°) Result of runout measurement:125 mm/100

  9. 0° 180° 90° 270° 360° Influence of filters and shoes to the runout result Example 3: Runout curve of a tire tread – using shoe 2: 0°, 10°, 20°, 30°, 40° Shoe 2:0° (Filter = 0°, Shoe 1 = 0°) Result of runout measurement:159mm/100 Shoe 2:10° (Filter = 0°, Shoe 1 = 0°) Result of runout measurement:136 mm/100 Shoe 2: 20° (Filter = 0°, Shoe 1 = 0°) Result of runout measurement:131 mm/100 Shoe 2: 30° (Filter = 0°, Shoe 1 = 0°) Result of runout measurement:128 mm/100 Shoe 2: 40° (Filter = 0°, Shoe 1 = 0°) Result of runout measurement:123 mm/100

  10. 0° 180° 90° 270° 360° Influence of filters and shoes to the runout result Selection of an adequate filter and shoe Step 1:determine the right shoe Shoe 2 must be used to bridge the gaps between the profile blocks. Value: 70°/10 Step 2:determine the right filter Filter value 70°/10 is used to minimize the ripple of the curve With Filter = 70°/10 , Shoe 1 = 0°, Shoe 2 = 70°/10) Result of runout measurement:136 mm/100

  11. Influence of filters and shoes to the runout result Conclusion > runout at maximum 1 / 2 at maximum > runout at minimum and shoe selection

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