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Tire360

The Starrett Bytewise Tire360 is a general-purpose line laser scanner that can digitize a tire from bead to bead in one revolution in one second, and acquire 15 million data points (or 120 million points in 8 seconds).

Scroll down for details or download the Tire360 Brochure below!

Tire360 Information

What Is It?

Tire360 is a 3D tire scanning system that offers two different analysis applications – treadwear and geometry.  Tire360 can scan a tire from bead-to-bead in less than 10 seconds that takes close to 1 hour using a fixed-point laser scanner.   

Treadwear analysis is done with the CTWIST software application.  CTWIST is the Circumferential Tread Wear Imaging System, established in 1994 in a partnership between Ford Motor Company, Bridgestone, Goodyear, Continental, Michelin, Cooper Tire and Bytewise Measurement Systems. 

Geometry analysis is done with the Tire360 software application.   This enables tire test centers to make routine tire checks for physical parameters such as section width, section height, tread radius, circumference, and the depth of tread wear indicators.  This geometry tool set also includes radial runout with harmonics.

How Does It Work?

Tire360 scans tires that have been pre-mounted on rims and inflated.  The tire/rim assembly is manually mounted onto the spindle tooling.  The machine rotates the spindle and scans the tire automatically.  The measurement cycle is triggered by a keyboard command.

The measurement head is mounted on a two-stage slide with one radial axis radial and one lateral axis.  Axes are manually positioned and lockable.  The radial axis is encoded in order to capture the true radius and circumference. 

The measurement head is populated with Starrett-Bytewise line laser sensors that capture the surface profile while the tire rotates.  The software applications automatically post-processes the data set to make the measurements according to user-set recipes.

Why Does It Matter?

Treadwear Programs – Tire designers are challenged to develop new tread patterns that deliver longer tread life and more uniform tread wear.  Starrett-Bytewise partnered with Ford Motor Company and several leading OEM tire makers to develop CTWIST in order to measure and characterize tread wear so that all tire makers could qualify their tread wear behavior with a uniform standard. With the CTWIST process, new tires are scanned after break-in, then periodically scanned during the wear cycles. CTWIST predicts the tread life for each rib and produces several tread wear reports to help the designer understand where improvements are needed.

Tire360 can run our CTWIST Software for tread wear analysis with a considerable savings in test time.  This time savings calculation compares Tire360 to fixed point scanning methods for a high-volume test center:

  • 50 vehicles every 10 days = 20 tires scanned per day.
  • Tire360 scan time only is only a few seconds for complete tire including sidewalls.
  • Fixed point scan is about 15 minutes per scan = 5 hours per day.
  • Scan time saving is about 5 hours per day = 1734 hours (72 days) per annum.
  • This will dramatically change your work-flow.
  • This will give you 72 more days of driver time per year otherwise spent waiting for testing to be done.

Production Tire Testing - Tire makers routinely measure production tires to verify the geometric precision.  This is traditionally done with various hand tools and is time consuming.  Tire360 incorporates many of the test operations into an automatic test routine.  These include measurements for section width, circumference, tread radius, wheel runout, plus the location and height of treadwear indicators and corresponding tread depth.  Tire360 greatly simplifies the work-flow and reduces the time for many tire testing processes.

Tire Development Testing – Tire manufacturers dedicate substantial effort in finite element modeling tires in order to design molds that produce tires that inflate to the intended design size and shape.  Powerful computers with highly specialized software applications are used to predict the size and shape of the tire after inflation.  Once the first tire is molded it is measured to see how close the “as-built” tire complies to the “as-designed” tire.  Differences can be analyzed to improve the design process. 

Current practices for measuring the size and shape of developmental tires, in many cases, is done by laying the tire on a granite table in a metrology lab, marking measurement points by hand, and manually measuring each point.  Tire360 reduces the time required to measure a new tire from hours to minutes.

Competitive Analysis - Tire manufacturing is a fiercely competitive business; and tire makers routinely buy competitors’ tires in order to analyze materials, construction, dynamic properties, treadwear, styling, size and shape, and tread design.  Tire360 makes it easy to scan any tire and view 2D cross-sectional profiles with key dimensional measurements. 

Technical Performance:

Mechanical System

Tire360 is packaged as an off-line station that scans tires that have been pre-mounted on rims and inflated.  The tire/rim assembly is manually mounted onto the spindle tooling.  The machine rotates the spindle and scans the tire automatically.  The measurement cycle is triggered by a keyboard command.

The measurement head is mounted on a two-stage slide with one radial axis radial and one lateral axis.  Axes are manually positioned and lockable.  The radial axis is encoded in order to capture the true radius and circumference. 

The system includes the scanning head, spindle with encoder, space-frame, manually-operated scanner positioning mechanism, controls, and PC workstation. 

Size and Range

As shown at right five 200mm sensors are configured in a plane arranged to view the cured tire from bead-to-bead.  The sensor size, number, and orientation are configured according to customer requirements as to tire size and range.

 

Sensor Technology

Our high speed line laser sensors are manufactured by Starrett-Bytewise in Columbus, Georgia, USA.  These are referred to by many other names – laser stripe sensors, sheet-of-light laser sensors, and laser profile sensors.  Tire360 uses the VHSLE series sensors (very high speed sheet-of-light ethernet) with CMOS cameras. 

Each sensor projects a line of laser light across the tire surface, which is reflected back to the sensor through a lens and onto a CMOS detector where each profile is digitized.  The digitized line is triangulated and converted to XY coordinates.  A patented method is employed to transform, or stitch, the data sets into a common coordinate system. 

PRECISION, QUALITY, INNOVATION, SINCE 1880.

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