Laser measurement technology developer Blum LMT (Ft. Mitchell, KY) has introduced the LM 100 laser micrometer to the U.S. market. Billed as a highly accurate, versatile laser micrometer system that measures ODs and dimensions of shafts, rubber rolls, and other cylindrical parts, the system can be used as a simple, economical stand-alone measuring device or can be fully integrated into an automated manufacturing line.
According to Paul Meinhardt, general manager, the LM 100 sets a new standard of accuracy for laser micrometers. "It has a repeatability of ±0.2 microns at a linearity of better than ±1 micron over the entire measuring range–from 0.02 in. to 4 ft, which can be extended to 20 ft upon request." In addition, the system is virtually unaffected by part surface variations, and measures highly polished or turned surfaces easily, which makes it suitable for operations with cylindrical grinders or lathes. The non-contact nature of the system enables it to measure highly delicate and easily damaged parts.
How the System Works
Different from laser scan micrometers based on complex parallel deflection systems with rotating or oscillating mirrors, the LM 100 is a single-focused beam system and is designed around a different principle. The actual stroke for the single-focused laser beam is permanently fixed by a high-resolution linear encoder in the vertical extension of the measuring line, providing real-time, closed-loop feedback of measurement values. Pulses triggered each time the laser beam is interrupted, or released by the target, are used to determine highly accurate dimensional values when compared to predetermined calibration values.
The system's design, simplicity, rigidity, and components work together to make it impervious to harsh plant floor operating environments with virtually maintenance-free operation. Moreover, the LM 100 can be extended, with options, to full measuring machine capability, including compound length measuring, position readout, and motor-operated positioning.
The system can accommodate SPC packages, such as Q-DAS, via serial port interface or Ethernet card, for trace documentation, and can be integrated into a fully automated process, including robotic loading and compensation value feedback to machine tool controls.
Because the LM 100 has a laser diode, no warm-up period is required, which results in instant measuring capability and service life of at least 50,000 hrs. The class 2 laser means there are no operational safety issues or concerns. Another plus is the graphic user interface, a Windows 95/98 7-in. touchscreen that eliminates cumbersome keyboarding.
Blum LMT, Inc., a Blum-Novotest Group Co., develops laser measurement systems for machine tool applications and manufactures measuring and testing systems for automotive and aerospace industries.
For more information, contact Blum LMT, Inc.; 250 Grandview Dr., Suite 10, Ft. Mitchell, KY 41017. Tel.: 606-344-6789; Fax: 606-344-6799.