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Finished Tyre Runout

The problem

Vibration due to tyre imbalance is the major cause of vehicle ride problems, driver discomfort and accelerated tyre wear and often associated with radial and lateral runout resulting from tyre and wheel assembly non uniformity, improper bead seating or mounting of the tyre.

Wheel balancing machines commonly use capacitive sensors for measuring tyre runout after the tyre has been assembled onto a rim. However capacitive sensors are limited as they must be positioned very close to the tyre surface and measure over a 10mm may not be used for all tyre compounds due top changes in dielectric properties.

The solution

Sigmavision has developed a low cost laser measurement system that may be used as a portable unit in conjunction with a manual tyre balancing machine or as a fixed mounted installation on an automatic tyre balancer. The system is designed to measure radial runout on the tread face and lateral runout on one or both sidewalls using dedicated, fixed mounted laser spot sensors. Read more

A dedicated software application called TRMS (Finished Tyre Runout Software) acquires data from the sensors and couples these with positional data from a rotary encoder. Special software algorithms remove sources of measurement error including tread patterns and sidewall features such as lettering, cross hatching and pin vents. Runout results are displayed on a graphical user interface and outputs may be sent to the balancer PLC to trigger alarms if they deviate from allowable tolerances.

System features:

Turnkey system for integration into an automatic wheel balancer or operated as a portable system with a manual balancer.

Sensors fully protected by a rugged housing.

Real-time display of measured RRO and LRO.

Statistical reporting and network compatible.

Control I/O to the balancer PLC.

Simple to set up, operate and maintain.

Measurement accuracy to <0.2mm.

Click on each image for a large version

Portable system setup

Fixed system setup