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L-742 Ultra Precision Roll Alignment System

L-742 Ultra Precision Roll Alignment System

Whether you have a paper mill, printing press or textile mill, your business can benefit from laser alignment. Most roll-type machines that are poorly aligned 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. This means a lot of down time and scrapped product.

Our patented, state-of-the-art laser alignment systems are up to six times more accurate than and twice as fast as a theodolite. The system can align one roll of a mill to another that is 200 feet away to within .004". And that's an honest .004", not what some technician thinks he sees in his theodolite. Furthermore, unlike theodolites, only one technician is needed to run the laser system, freeing up critical maintenance staff during shutdowns.

 


L-742 Roll System - Showing Laser Transfer

The L-742W Ultra-Precision Roll Alignment system has been designed specifically for roll alignment applications. It is a very affordable yet powerful tool to not only measure but also fix roll misalignment on almost any kind of paper mill or process mill, all in a fraction of the time needed with conventional methods. The system is so accurate and easy to use that you can get the alignment right 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. This increased productivity can pay for the laser in a matter months.

Laser Planes Have 200-Foot Range Vertically and Horizontally

Laser roll alignment

The L-742W Ultra-Precision Dual Scan® Laser offers two automatically rotating laser planes 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. In addition, the laser can be configured at the factory to have either two vertical planes, or one horizontal and one vertical plane.

Multiple Wireless Targets Speeds Alignments up to 70%

Hamar's L-732 utilizes up to 5 A-1519-2.4ZB targets, with up to 150 feet (45m) of range, to send their data to our R-1355-2.4ZB IP67 Rugged PDA Readout. The R-1355 can display up to 5 targets simultaneously, reducing alignment times by up to 70% over optics or other alignment systems.

Measure More Rolls With Each Setup
L-742W Roll Alignment System By using a laser plane, Hamar's L-732 has the ability to measure multiple rolls from the same setup. Rolls up to 100 feet (30.5 m) above the laser can easily be measured.


 


R-1355-2.4ZB PDA Readout with
laser aligned to reference targets,
showing a roll measurement.

Read9 Multi-Target Display Speeds up Laser Transfer
The setup process is easy and fast because our Read9 PDA Display program displays up to 5 wireless targets simultaneously, so when using the Laser Transfer Method, you simply look at the data for the 2 reference targets (usually #2 & #3) and adjust the laser until both numbers are the same.  Then use the measuring target to measure the roll  or rolls.

Tram Bar Measurement Method

For situations where it’s impossible to put the target on the side of the roll, we use the Tram Bar Method.  Here you put a tram bar over the end of the shaft and put a target on it.  Zero at 12:00 and measure at 6:00 to check roll levelness. Then zero at 3:00 and measure 9:00 to get the parallelism relative to the reference roll.

 
A-1519-2.4ZB Target using Tramming Method to measure the parallelism

 
Less Manpower Needed for Alignments

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

L-742W Significantly Simplifies Roll Parallelism Checks
Read 9 PDA Software - Roll Alignment Tab
Roll Alignment Procedure - Top View
Step1 - Initial Setup
(all reading in inches)

The setup process is easy and fast because we use timesaving and simplifying features like is our ALIGN mode in the R-1355-2.4ZB readout. The feature compares one targets reading versus 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 calculate the difference in his head. It also is a great time saver for making the laser parallel to the reference targets.

 
High Accuracy Reduces Optics' Guesswork
L-742W Roll Alignment System

Hamar Laser's L-742W Roll Alignment System is accurate to +/-.002" (.06 mm) in 200' (61 meters) under good atmospheric conditions. This accuracy turns the alignment process from an art using optics to a science using lasers. The use of optics is 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 two optics operators will get the same numbers. With the L-742W, this guesswork is essentially eliminated because the target electronics determine the alignment reading, which is very repeatable from one operator to the next.

 
Factory-Built Benchmark Fixturing
L-742W Roll Alignment System

The L-742W Roll Alignment System comes with fixtures to pick up floor benchmarks for aligning the laser to the machine's centerline. The L-742W 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 not much better shape than the floor they sit in. Cracks in the floor can seriously affect the position of the benchmarks and often result in poor alignments.

 
Application Note
Data Sheet
How it Works
Roll-Alignment
 
L-742W System Features
  • Two continuously rotating laser planes with operational range of 100' (30.5 meters) in radius.
  • Completely self-contained
  • Backlit levels accurate to 1 arc second (0.00006"/ft or 0.005mm/M)
  • Laser planes flat to 1/2 arc second (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 flat to 1/2 arc second (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.
  • Planes are mutually square to 1 arc second (0.00006"/ft or 0.005 mm/M) • Standard targets: A-1519-2.4ZB Single-Axis Wireless Target with 1" (24.5 mm) measuring range and .0005" (.01 mm) resolution
  • A-1520-2.4ZB Single-Axis Wireless Targets w/1" (24.5mm) range and .0001" (0.0025mm) resolution for higher accuracy applications
  • Factory-built benchmark fixtures and laser translation slide are included in system
  • Includes Pitch/Roll/Yaw base with coarse and fine adjustments
  • Instant on with virtually no warm-up
  • Battery or AC powered
  • Typical setup time 15 minutes or less
  • Diode lasers 2 times more stable than HeNe-based laser systems
 

L-732W Precision Roll Alignment System for Lower Accuracy Applications

L-742 Ultra Precision Roll Alignment System

Primarily designed for roll alignment and other similar alignment applications that do not require the exacting toler-ances of the L-742W Ultra-Precision Laser, the L-732W Precision Dual Scan Laser also offers two automatically ro¬tating laser planes that can be configured at the factory as either two vertical planes, or one horizontal and one ver¬tical laser plane.

The L-732W laser planes are flat and square to 2 arc sec¬onds (0.00012"/ft or 0.01 mm/M). The laser comes with a pitch, roll and yaw adjust¬ment base for set¬ting the laser planes par¬allel to reference points, 2-arc-second level vials and a powerful magnet for maxi¬mum stabil¬ity.

 
L-732W System Features
  • Two automatically rotating laser planes, flat to 2 arc seconds (0.00012"/ft. or .01 mm/M in 180° sweep and 1 arc second in 90° sweep
  • Completely self-contained
  • Planes are mutually square to 2 arc seconds (0.00012"/ft. or .01 mm/M
  • Includes Pitch/Roll/Yaw base with medium adjustment
  • Backlit levels accurate to 2 arc seconds (0.00012"/ft. or .01 mm/M
  • Factory-built benchmarking feature
  • Standard targets: A-1519-2.4ZB Single-Axis Wireless Target with 1" (24.5 mm) measuring range and .0005" (.01 mm) resolution
  • A-1520-2.4ZB Single-Axis Wireless Targets w/1" (24.5mm) range and .0001" (0.0025mm) resolution for higher accuracy application
  • Instant on with virtually no warm-up
  • Battery or AC powered
  • Typical setup time 20 minutes or less
  • Multiple mounting orientations
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