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L-742 Roll Forming Alignment System

L-742 Roll Forming Alignment System Roll Forming Alignment

The L-742 Ultra-Precision Dual Scan® Laser is an ideal instrument to quickly and accurately calibrate the geometry of almost all machining centers and is particularly useful for aligning the dies on a roll forming machine.

The L-742 is one of only 2 lasers in the world (the other is the L-732) to offer 2 automatically rotating laser planes that are accurate enough for today's ever-tightening tolerances. This creates a powerful tool that not only FINDS, but also FIXES geometry problems, all in a fraction of the time needed with conventional methods.

Roll Forming Alignments Dramatically Improved with L-742

Roll forming machines traditionally are very difficult to align. Typically, an upper set of dies not only needs to be aligned to each other, axially, but they also have to be aligned or plumbed to a lower set of dies. With traditional methods like an indicator with alignment bars, the task is very time consuming and fraught with stack up errors.

The L-742 has one vertical and one horizontal rotating laser plane. The vertical laser plane is used to axially align the upper set of rolls to each other and to the lower set of rolls, all with one setup. The horizontal plane is used to align the rolls in the same plane and also check for parallelism to the lower rolls.

Roll Forming 3D Close Up
L-742 Checking Alignment of ROll Forming Mill
Roll Forming with L-723-2
Archive Picture showing L-723 Checking
Alignment of Roll Forming Mill

Wireless Targets and Readout Speeds Setup

With Hamar's 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 color software and a wireless receiver to display up to 5 targets simultaneously. Other features like electronic zeroing and target averaging help to speed setup and alignment.

Continuously Sweeping Lasers and Live Data Reduces Downtime

Continuously sweeping lasers and live data output create a powerful combination to align machinery up to 70% faster than traditional or interferometer methods. Downed machines will be up and running, producing quality parts in record time. HLI's continuously sweeping lasers are far superior to other point-and-shoot laser systems that require time-consuming manual laser rotation and target setup for each point measured. They also allow the use of multiple targets, which is especially helpful for large machinery.

By providing live alignment data, misalignment errors can be quickly and easily fixed without having to change the setup. This is a tremendous benefit, especially if you are used to using an interferometer, where the entire length of an axis must be measured before the straightness or flatness can be determined and the data provided is not even live.

Squareness Built Into Laser Head

One of the L-742's greatest features is its built-in squareness (each plane is square to each other to within with an accuracy of up to 1 arc second -- 0.00006"/ft or 0.005 mm/M)). If you have ever tried to set up a cylindrical square or interferometer to check squareness, you will be amazed at how quickly and easily the squareness of not just one axis, but multiple axes can be measured, usually with one setup! Where an interferometer may take hours just to set up a squareness check, the L-742 takes just 15 minutes. And, unlike a cylindrical square, the L-742 can check the entire length of a machine's axis, up to 100 feet (30.5 meters), not just 12" (305 mm) or 24" (610 mm) of it.

Simultaneously Measure 2 Axes with One Setup

Another great time saver is the L-742's ability to measure the 2 of the 3 main axes of a machine at the same time. Not only can you measure the flatness and straightness of each axis, but you can also measure the squareness of two axes and also the parallelism of additional axes, like an extending quill or rotary axis.

L-742 Significantly Reduces Stack Up Errors

One of the biggest problems with aligning machine tools using conventional methods is that many different alignment tools must be used, requiring a lot of time and increasing stack-up errors. Another problem is that an alignment is only as good as the tools used to perform it. The machinist level is a good example: it has a resolution of .0005" per foot, not very accurate for today's ever-tightening tolerances.

The L-742's laser planes, by contrast, have a flatness of 1/2 an arc second (0.00003"/ft or 0.0025mm/M) in a 180º sweep and 1/4 arc second (0.000015"/ft or 0.001 mm/M) in 90º sweep. The laser planes are square to each other to with an accuracy of up to 1 arc second (0.00006"/ft or 0.005 mm/M). They further have the advantage of creating a single reference from which to measure machine geometry, significantly reducing stack-up errors.

Software Quickly Collects and Analyzes Data

Hamar's new line of alignment software, combined with newly designed computer interfaces, makes collecting and analyzing machining center alignment data faster and easier. All of the software is Windows based and provides large, color graphics. Alignment reports clearly and concisely show the machine's condition. In today's world of ISO 9000 documentation hell, our software will help you submit alignment reports in record time..

L-740 Datasheet
Application Note
How it Works
Roll Forming


  • 2 continuously rotating laser planes with operational range of 100' (30.5 meters) in radius..
  • Laser planes flat to 1/2 arc seconds (0.00003"/ft or 0.0025mm/M) in 180º sweep and 1/4 arc second (0.000015"/ft or 0.001 mm/M) in 90º sweep.
  • Planes are mutually square to 1 arc second (0.00006"/ft or 0.005 mm/M).
  • Includes Pitch/Roll/Yaw base with coarse and fine adjustments.
  • High Accuracy Targets: A-1519-2.4ZB Single-Axis, Wireless Target with 1" (24.5 mm) Measuring Range and .00002" (0.0005 mm) Resolution.
  • Ultra Accuracy Targets: Uses A-1520-2.4ZB Single-Axis Wireless Target with .250" Range and .00002" (0.00025 mm) resolution for higher accuracy applications.
  • Standard illuminated levels accurate to 2 arc second (0.00012"/ft or 0.01 mm/M). High accuracy split-prism upgrade levels accurate to 1 arc second.
  • Backlit levels accurate to 1 arc second (0.00006"/ft or 0.005 mm/M).
  • Instant on with virtually no warm-up.
  • Typical setup time 20 minutes or less.
  • Diode lasers 2 times more stable than HeNe based laser systems.
  • Battery or AC powered.
  • Completely self contained
© 2012 Hamar Laser. Products Covered Under US & Foreign Patents.