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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.

Features:

More Accurate Alignment Increases Material Flow and Quality

With poor roll alignment, most machines, whether a film line or paper mill, will produce a product that has wrinkles and other quality problems. The material will also wander or "walk" to one side of the roll or the other, all which leads to significant downtime and potentially tons of scrapped product. Typically, the only remedy is to call the local service company to bring the transits or theodolites or to try using tram bars and inside micrometers, all of which are very time-consuming, sometimes not very accurate, and costly.

The L-742 Roll Alignment System, by contrast, is so accurate and easy to use that you can set the rolls parallel correctly the first time, saving enormous costs in reduced downtime, scrapped product and quality problems. In fact, most machines that can handle it can run at faster speeds after laser alignment. In many cases, this increased productivity will pay for the laser in a matter of months.

L-742 Significantly Simplifies Roll Parallelism Checks

The L-742 is so easy to use its operation usually requires only one technician. With 2 automatically rotating laser planes, each with a range of 100 feet (30.5 meters) in radius, rolls alignment at multiple elevations can easily be achieved with one setup at each machine section.

The setup process is easy and fast because we use timesaving and simplifying features like our ALIGN mode in the R-1310 PDA Readout. The feature compares one target reading to another, calculating the difference between the two. This allows the user to adjust the roll until the "difference" reading is zero instead of having to perform manual calculations. It also is a great time saver for the bucking-in (laser setup) process. It also is a great time saver for the bucking in process..

High Accuracy Reduces Optics' Guesswork

Hamar Laser's L-742 Roll Alignment System is accurate to +/-.003" (.06 mm) in 200 feet (61 meters) under good atmospheric conditions. This accuracy turns the alignment process from an art using laser transits or theodolites to a science using lasers. Optics are considered an art because each operator "sees" the readings differently and essentially has to make an educated guess as to the correct number. In fact, it is rare that any 2 optics technicians will get the same numbers. With the L-742, this guesswork is essentially eliminated because the target electronics determine the alignment reading. And it is very repeatable from one operator to the next, unlike transits or theodolites!

Factory-Built Benchmark Fixturing

The L-742 Roll Alignment System comes with accessory fixtures to pick up floor benchmarks for aligning the laser to the machine's centerline. The L-742 also has the flexibility to easily use the reference roll to set up temporary offset centerlines. In fact, this is our preferred method of referencing the machine's centerline, as benchmarks are frequently in as poor shape as the floor they sit in. Cracks in the floor can seriously affect the position of the benchmarks and often result in poor roll alignments.

Laser Planes Have 200-Foot Range

One of the most powerful features of the L-742 is the automatically rotating laser plane with 100-foot (30.5 meters) range in radius. That means rolls, at almost any elevation, can be measured simultaneously without having to move the laser vertically. This also allows the laser to be moved to more sections without having to change the location of the reference targets.

Competitive Systems Use 10-Year Old Technology

Our competitors' roll alignment laser systems use point-and-shoot laser technology, along with remote beam-bending devices that are difficult to set up, are not very accurate and relocate. We abandoned that laser technology 10 years ago with the introduction of our multi-plane, continuously rotating lasers. Not only is point-and-shoot technology difficult to set up, it also requires extra manpower and about 50% more time.

Less Manpower Needed for Alignments

The L-742 Roll Alignment System reduces the alignment team manpower. Wireless targets and automatically rotating laser planes make setting up the laser at each machine section much easier, requiring only one operator. The wireless readout displays both targets simultaneously, allowing the user to quickly reference the benchmarks. Traditional optics, like transits and theodolites, usually require at least one man holding a reference target in both reference locations.

No Need for Theodolites’ Time-Consuming Recalibration after Plumb Measurements

Unlike optics that usually require recalibration of the levels each time plumb is checked, the L-742 can simultaneously check level and plumb from a single setup. The levels usually only require calibration once a month or so and can easily be checked in the field with a simple 10-minute procedure.

Wireless Targets and Readout Speeds Setup

With Hamar's new line of wireless targets (A-1519-900, A-1520-900 or, A-1532 & A-1533) there is no need to string long extension cords to reference targets. The targets have up to a 3" (76 mm) measuring range and can be used up to 100 feet (30.5 meters) from the laser.

The 1532/1533 targets have built-in readouts and .001" (0.013 mm) resolution. The A-1519-900/A-1520-900 targets use the R-1310-900 Wireless PDA Readout, provide up to 0.00002" (0.0005 mm) resolution, color software and a wireless receiver to display up to four targets simultaneously. Other features like electronic zeroing and target averaging help to speed 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.

HOW IT WORKS
Roll Alignment

Applications
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.

FEATURES

• 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 0.0025 mm/M) in 180º sweep and 1/4 arc second (0.000015"/ft or 0.001 mm/M) in 90º sweep.
• Laser 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 (L-732 has only course adjustments).
• Standard Targets: A-1519 Single-Axis, Wireless Target with 1" (24.5 mm) Measuring Range and 0.0005" (0.0125 mm) Resolution.
• Uses A-1519HR Single-Axis, Wireless Target with 1" (24.5 mm) Measuring Range and 0.0001" (0.0025 mm) Resolution for higher accuracy applications.
• 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.