Kaman ThreadChecker - Manual (Page 3)

Copyright © 2008 Kaman Aerospace Corporation
PART NO: 860510-001A Kaman Precision Products
Last Revised: 6/8/11 Measuring & Memory Systems
217 Smith Street
Middletown, CT 06457
www.kamansensors.com or 860-632-4442
Page 3 of 13
ThreadChecker Universal
Kaman’s ThreadChecker Measuring System is a noncontact linear proximity measuring
system. This low-cost, easy-to-use system makes precision static and dynamic
measurements of the presence or absence of a thread.
Features Summary / Advantages
• Easy to Use
• Universal Electronics for All Sensor Types and Target Types
• Built in Self Test
• Small size for efficient system integration: less than 4 cubic inches (80cc)
• Flexible packaging and performance.
• Several sensor options.
• Flexible Switched Output Options (window or level comparator / inversion of limit)
available to user
• Low power consumption
ThreadChecker Unit
The ThreadChecker system consists of two subassemblies: the sensor with integrated
cable, and the signal conditioning electronics module with power and output cable. The
ThreadChecker electronics uses a standard 24AWG cable to bring +15 Vdc to +30 Vdc
into the electronics and provide outputs for the analog voltage and switch functions
.
Theory of Operation
The ThreadChecker system is an eddy current system. The sensor coil is resonated
and the amount of impedance change in the output is measured by the electronics. The
proximity of the target to the sensor coil will cause the sensor coil to change impedance.
The signal is then processed and filtered to obtain an analog voltage proportional to
the target position or displacement.
Cable Connections and Power I/O Cable Color Chart:
Wire Color Signal
BROWN Vin 15-30vdc
BLUE GND
WHITE SWITCHED OUTPUT
BLACK Vout 0-10v