L-743 Ultra-Precision Triple Scan Laser

Hamar Laser’s L-743 Ultra-Precision Triple Scan® Laser Alignment System is the most accurate and versatile alignment tool on the market today. This powerful yet easy-to-use system is ideal for quickly and accurately checking and fixing the geometry of almost all machining centers and excels at many other demanding applications. Our Ultra-Precision Series L-743 and Precision Series L-733 are the only alignment systems in the world to offer three automatically rotating laser planes with the extreme high accuracy needed for today’s ever-tightening tolerances. This creates a powerful tool that not only measures surface flatness, squareness and straightness, but fixes complex alignment problems in a fraction of the time needed with conventional methods.

System Highlights

  • Fast: Data updates in real time to align boring mills, gantries and machining centers up to 70% faster than traditional methods or laser interferometers.
  • Easy: Measures the three main axes of a machine at the same time for flatness, straightness and squareness, and checks any additional axes for parallelism, usually with the one setup.
  • Accurate: Ultra-precise laser planes have a flatness of 0.5 arc second (.00003 in/ft or 0.0025 mm/m) in a 180º sweep and 0.25 arc second (.000015 in/ft or 0.001 mm/m) in a 90º sweep.
  • Versatile: Ideal for nearly all types of machining centers, as well as many other applications including aircraft assembly, automotive transfer lines, injection molding machines, roll alignment and laser and water-jet cutting machines.
  • Smart: Powerful Windows-based alignment software, combined with advanced wireless interfaces, makes collecting and analyzing alignment data fast and easy.

Key Features

  • 3 continuously rotating laser planes with operational range of 100 ft (30.5 m) in radius.
  • Laser planes flat to 0.5 arc second (.00003 in/ft or 0.0025 mm/m) in 180º sweep and 0.25 arc second (.000015 in/ft or 0.001 mm/m) in 90º sweep.
  • Planes are mutually square up to 1 arc second (.00006 in/ft or 0.005 mm/m).
  • Includes L-123 Pitch/Roll/Yaw base with coarse and fine adjustments.
  • Standard Targets: A-1519 2.4ZB Wireless Target with ±.5 in. (12.7 mm) Measuring Range and .00002 in. (0.00058 mm) Resolution.
  • Backlit levels accurate to 3 arc seconds (.000018 in/ft or 0.015 mm/m).
  • Upgrade to Split-Prism levels for accuracy to .00006 in/ft (0.005 mm/m).
  • Typical setup time of 20 minutes or less.
  • Battery or AC powered.

If you do not see your application listed, please contact us to discuss your requirements. We will be more than happy to provide a solution that’s right for your unique alignment problem.



  • Aircraft Interior Alignment (Storage Bins, Galleys, etc.)
  • Body-to-Body Join Assembly
  • Floor Beam Alignment
  • Jig/Tooling Calibration and Leveling
  • Seat-Track Alignment
  • Wing-to-Body Joining Alignment

Fabricating Machinery

  • Laser-Cutting Machines
  • Routers
  • Saw Mills
  • Tube-Bending Machines
  • Water-Jet Machines
  • Woodworking Machines

Fabrication Alignment

  • Agricultural Machinery Assembly
  • Large Construction Machinery Assembly
  • Locomotive Assembly
  • Truck Bed Assembly
  • Wind Turbine Flange Parallelism

Machine Tools

  • Floor and Spar Mills
  • Gantries
  • Horizontal and Vertical Boring Mills
  • Horizontal and Vertical Machining Centers
  • Large-Lathe Beds
  • Machine Tool Assembly and Calibration
  • Roll-Forming Machines
  • Transfer-Line Wing Bases
  • Vertical and Horizontal Presses
  • Vertical-Turning Lathes (VTLs)


  • Blown-Film Lines Roll Alignments
  • Film Lines Roll Alignments
  • Injection Molding Machines

Quality Control

  • Checking Flatness, Straightness, Squareness and Parallelism of Large Fixtures and Parts
  • Scraping Machine Rails
  • Surface Plate Calibration

Roll Alignment

  • Aluminum Mills
  • Continuous Casting Machines
  • Paper Mills
  • Printing Presses
  • Steel Mills
  • Textile Mills

Ship Building

  • Gun-Bearing Alignment
  • LNG Tanker Hull Construction
  • Section Alignment and Layout

Most Versatile Machine Tool Laser Alignment System on the Market

The L-743 Triple Scan® Laser Alignment System is one of only 2 lasers (the other is the L-733) in the world to offer 3 automatically rotating laser planes that are accurate enough for today’s ever-increasing tolerances. This creates not only a powerful measurement tool for surface flatness, squareness and straightness MEASUREMENTS, but also a tool that FIXES alignment problems in a fraction of the time needed with conventional methods.

Unsurpassed Laser Plane Flatness

One of the critical components of any laser alignment 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-743 features the flattest laser plane in the world that is flat to 1/2 an arc second (0.00003 in/ft or 0.0025 mm/m) in a 360º sweep and 1/4 arc sec in a 90º sweep (0.000015 in/ft or 0.001 mm/m).

100' Straightness and Squareness Alignment Measurement Capability

The 3 laser planes are squarewith an accuracy of up to 1 arc second (0.00006 in/ft or 0.005 mm /m). This squareness can be projected out 100 feet (30.5 M), allowing squareness and straightness measurement of even the tallest machine in the world to be easily checked. The L-743 also features 2 built-in level vials that are accurate to 1 arc second.

New Line of Wireless Targets

Another critical component of laser alignment machines is the resolution of the targets. This determines how close the straightness or flatness measurements can be made.

The L-743 system uses our line of wireless targets (A-1519-2.4ZB and A-1520-2.4ZB) that feature up to 0.00001 in. (0.00025 mm) resolution, large measuring ranges of up to 1 in. (25 mm) and a 2.4 GHz “Zigbee” radio communication with our R-1356.24ZB PDA Readout, which can simultaneously display up to 5 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 alignment systems, the targets provide live alignment data so misalignment errors can be fixed without changing the setup!

One Setup for Most Laser Alignments

The L-743 Triple Scan Laser Alignment Tool usually allows you to check the entire machine with one setup, before you begin an alignment. This quick analysis, where every part of the machine is checked to the same coordinate system, assures that stack up errors are reduced and all alignment problems are quickly identified.

Laser Alignment Applications

For applications with tolerances of 0.00002 in/ft or 0.0017 mm/m or higher, the L-743 can quickly measure and correct alignment errors with minimal setup for the following applications

  • Machining center alignment (HBMs, VBMs, HMCs, VMCs, gantries, surface grinders and VTL’s)
  • Automotive transfer-line wing bases
  • Injection molding machines and presses
  • Aircraft assembly (seat track alignment, setting water, butt and station planes, wing-to-body and body-to-body join alignment, etc.)
  • Roll alignment in:
    • Paper mills,
    • Printing presses
    • Film lines
  • High-precision, laser and water-jet cutting machines
  • Circuit board drilling machines
  • Measuring and aligning:
  • Surface flatness of almost any surface (squares, frames, ways, flanges, circles, etc.)
    • The squareness of up to 3 surfaces
    • The straightness measurement of horizontal and vertical surfaces
    • The straightness and flatness measurements of horizontally and vertically traversing axes
    • The parallelism of horizontal and vertical 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 horizontal surfaces
  • Checking way twist and parallelism between vertical surfaces
  • Measuring surfaces up to 200 feet (61 meters) long with 1 setup

Powerful Alignment Software Downloads Data Automatically

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 straightness measurements and squareness of each line of motion of a machining center, gantry or boring mill. 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.