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Timber Processing Magazine

L-742 Ultra-Precision Dual Scan® Laser Alignment

L-742 Ultra-Precision Dual Scan Laser Alignment System

Designed primarily for roll alignment and other similar applications, the L-742 Dual Scan® Laser System is the only laser in the world to offer 2 automatically rotating laser planes that are accurate enough for today's ever-tightening tolerances. The laser can be configured by the factory to have either 2 vertical planes, or 1 horizontal and 1 vertical laser plane. This creates a powerful tool to not only MEASURE but also FIX problems in a fraction of the time needed with conventional methods.

Unsurpassed Plane Flatness

One of the critical components of any laser system is the straightness or flatness of the laser beam or plane, as this is the reference from which the measurements are made.

The L-742 features the flattest laser plane in the world. Its continuously rotating laser plane is flat to 1/2 an arc second (0.00003"/ft or 0.002 mm/M) in a 360º sweep and 1/4 arcsec in a 90º sweep (0.000015"/ft or 0.001 mm/M).

  100' Squareness Measuring Capability

The 2 laser planes are square to within 1 arc second (0.00006"/ft or 0.005 mm /M). This squareness can be projected out 100' (30.5 M), allowing squareness of even the tallest machine in the world to be easily checked. The L-742 also features 2 built-in level vials that are accurate to 1 arc second.

Two Configurations for Many Different Applications

With two continuously sweeping, ultra-flat, orthogonal laser planes, the L-742 Dual Scan® Laser System is ideally suited for a whole host of alignment applications. The L-742 comes in 2 configurations. The standard L-742 has 1 horizontal laser plane and 1 vertical laser plane. It is used for measuring flatness straightness and squareness on machining centers, gantries and roll forming machines. The L-742WW has 2 vertical laser planes and is used primarily for aligning the horizontal roll parallelism of printing presses, paper mills, films lines and other roll alignment applications.

New Line of Wireless Targets

Another critical component of laser alignment systems is the resolution of the targets. This determines how close the measurements can be made.

The L-742 system utilizes our new line of wireless targets ( A-1519-2.4ZB and A-1520-2.4ZB), there is no need to string long extension cords to reference targets. The targets have up to a 1" measuring range, a resolution as low as 0.00001" (0.00025 mm) and can be used up to 100 feet (30.5 meters) from the readout. The R-1355-2.4ZB Readout uses a PDA, which can simultaneously display up to 4 targets.

These targets are all powered by rechargeable batteries, are lightweight and can be used as digital height gages when used with precision inserts. And like all Hamar Laser systems, the targets provide live alignment data so misalignment errors can be fixed without changing the setup!



For applications with tolerances of 0.00002"/ft or 0.0017 mm/M or higher, the L-742 can quickly measure and correct alignment errors with minimal setup for the following applications:

  • Roll parallelism in:
    • Paper mills,
    • Printing presses
    • Film lines
  • Roll forming machines
  • High-precision, laser and water-jet cutting machines
  • Circuit board drilling machines
  • Leveling almost any surface (squares, frames, ways, flanges, circles, etc.)
  • Measuring and aligning:
    • The flatness and straightness of almost any surface (squares, frames, ways, flanges, circles, etc.)
    • The squareness of any 2 surfaces
    • The flatness and straightness of vertical surfaces
    • The flatness and straightness of horizontally and vertically traversing axes
    • The parallelism of vertical or horizontal surfaces, even if those surfaces are 100 feet (30.5 meters apart)
  • Checking plumb of a vertical surface up to 100 feet (30.5 meters)
  • Checking way twist and parallelism between surfaces
  • Measuring surfaces up to 200 feet (61 meters) long with 1 setup.

Geometry Analysis Software

For wireless recording and analyzing alignment data, our color, 3-D flatness and squareness analysis software, Plane5, simplifies and streamlines the data analysis process. It can measure up to 7 different surfaces in one project setup file and present a color, 3-D graph of the flatness and squareness analysis for each surface.

Our Machine Tool Geometry Software is also very useful for measuring and analyzing the lines of motion of machine tools. The user can select the type of machine tool to be analyzed and the software displays the top, side and front views of the machine. After collecting the data, the report shows flatness, straightness, parallelism and squareness errors on an easy-to-read report.

Click on the applications to the right for a more detailed discussion on the L-742

View brochure [PDF, 618K]


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