1. Loudspeaker Component Measurement System
Introducing…..
TRUE TECHNOLOGIES
LCMS
Loudspeaker Component Measurement System

2. Loudspeaker Component Measurement System
Measurement Applications
Spiders and Surrounds
Tweeter Domes/Compression Driver Domes
Voice Coil Motors - BL(x)
Assembled Drivers
Raw Foam
Adhesive Peel Strength*
Magnet Material Property Analysis*
Suitable for both R&D and QC work
*Available as an option. Inquire with True Technologies
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3. LCMS LCMS Construction and Features
Precision micro-stepping stepper Motor
High Resolution Force Gage
High/Low Capacity Force Gage Options
Frame large enough to accommodate > 12” Woofers
Built in statistical analysis tools for evaluating component consistency within or between lots
Built in tools to create pass/fail limits based on manually entered values or previously measured components
Database Driven. Easily search for and retrieve information on previously measured parts or pass/fail standards
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4. LCMS: Force vs. Displacement/Cms(x) curves
Quick One-Directional Force vs. Deflection Measurements
Most commonly used in a QC setting
Typical Testing Time < 1 minute/part
Excellent gage R&R performance
Cms(x) curves calculated from curve fit of force vs. deflection data
Force vs. Deflection Data
Pass/Fail limits calculated from previously measured lots of components
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5. LCMS: Force vs. Displacement/Cms(x) curves
Quick Clamp Setup for One-Directional Force vs. Deflection Measurements.
Testing a Loudspeaker Cone in QC
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6. LCMS: Force vs. Displacement/Cms(x) curves
Full Hysteresis Measurements
DUT measured in both directions
Most commonly used in an R&D setting
Excellent tool to evaluate range of linearity and symmetry
DUT measured in upward direction
Kms(x) curve calculated from curve fit of upper and lower hysteresis legs
DUT measured in downward direction
Mirrored Kms(x) curve is displayed for evaluation of symmetry
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7. LCMS: Force vs. Displacement/Cms(x) curves
Full Hysteresis Measurements
Testing a Spider with ID fully clamped for bi-direction testing
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8. LCMS: Force vs. Displacement/Cms(x) curves
Tools for comparing measurements to hanging mass legacy standards
Enter pass/fail upper lower displacement limits for one or multiple reference masses
DUT out of spec at 500 gram reference mass
DUT in spec at 200 gram reference mass
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9. LCMS: Force vs. Displacement/Cms(x) curves
Tools for evaluating lots of components and creating pass/fail limits
Control how limits are displayed and enforced
Measurement fliers can be removed from the analysis
Manually edit data for individual cells or for ranges
Choose the type of statistical analysis and set preliminary offsets
Transfer statistical limit lines to pass/fail grid
Limits can be edited as absolute values or as offsets from the group average
Data can be copied to/pasted from the Windows clipboard for external data manipulation
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10. LCMS: Force vs. Displacement/Cms(x) curves
Tools for evaluating lots of components and creating pass/fail limits
Viewing filters allow hiding and coloring of curves
Set how to display new measurements
Assign groups #s to different lots of DUTs for easy comparison/analysis
Limit curves expanded manually above 5mm
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11. LCMS: Force vs. Displacement/Cms(x) curves
Tools for evaluating lots of components and creating pass/fail limits
Change horizontal axis to view vs. measurement #
Set deflection to view cross section of measurement group
This view shows the force at 10mm for 13 different parts. Multiple files can be opened to compare different lots of parts.
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12. LCMS: Voice Coil Motors
BL(x) curves measured using a constant current source
User provides dimensional data
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13. LCMS: Component Database
Easy-to-Use and highly flexible built in database
Database fields are setup by the user with built in tools
Database setup service included if desired
Click on a row to open the measurement or pass/fail standard
Drop down selection during file save forces consistent data entry for easy searching later
Set search terms to narrow list of past measurements or pass/fail standards
Pictures, BOMS, part history, comments, etc. can be stored with the component measurement
Export/Import of pass/fail standards provides easy sharing between suppliers/customer
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14. Loudspeaker Component Measurement System
Contact:
True Technologies
8309 West Ridge Drive
Pleasant Prairie, WI USA
The user’s manual can be found online for more detailed information:
LCMS