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VOLUME -22 NUMBER 10
Publication Date: 10/1/2007
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October 2007 Issue
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Renishaw: Laser Quickly Detects Broken Tools
Laser system recognizes tools.
Hoffman Estates, IL — Renishaw has unveiled its new, second-generation TRS2 broken tool detection system, making precise laser checking affordable and practical for all kinds of machine tools. The "one box" design combines the laser source and detection electronics in a single compact unit just 83mm high x 38mm wide x 73mm deep (3.27 x 1.50 x 2.87-in.).
The unit's compact size enables easy mounting outside the work zone, safe from collision. It can detect a whole range of solid center tools, including drills, taps, reamers, slot drills, standard and ball nose end mills, and now even gun drills. Detection typically takes only a second. The system can process tools as small as 0.2mm, while screening out chip and coolant mis-readings. The versatile TRS2 can be easily fitted to everything from mini drilling systems for electronics boards to large machining centers.
The laser system offers wide detection range of 0.3 to 2.0m (13 to 80-in.) while innovative Toolwise
electronics technology reliably distinguishes good tools from broken tools without mis-readings caused by coolant and chips. The Toolwise technology analyzes reflected light patterns from the rotating tool as it enters the beam, rejecting random light patterns created by coolant or chips. Tool edges generate a regular light pattern as the tool spins, while chips and coolant give random reflections. A repeating pattern represents a tool present and whole. A non-repeating pattern indicates a tool broken.
The advanced electronics can detect and process reflections off both bright and dark tools. New on the TRS2, monitoring can be provided at three different tool rotation speeds: 5000 rpm, 1000 rpm and 200 rpm, to cover a wide range of applications and tooling. Used for high-speed tools, 5000 rpm is the default speed and gives the shortest cycle time. Intermediate 1000 rpm can be used for tools rated for less than 5000 rpm, particularly large, heavier tools. The slowest speed, 200 rpm is intended for gun drills.
The instrument can be mounted to any rigid surface of the machine. Positioning relative to the tool is not critical and does not require accurate alignment with the machine's axes.
The tool recognition process is fast, usually taking about one second. A flexible setup process allows a user-defined broken tool detection point to be established within the machine's envelope. Detection is performed when a rotating tool reaches this point. The TRS2 is supplied with a filter regulator assembly that delivers a constant supply of clean dry air protecting the laser from contaminants. This proven protection method has been adapted from the company's Non-Contact (NC) family of laser toolsetters.
For more information, contact: Renishaw, Inc., 5277 Trillium Blvd., Hoffman Estates, IL 60192
847-286-9953 fax: 847-286-9974 Web:
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