Aligning Continuous Casters and Steel Mill Rolls
One of the more time-consum¬ing tasks in maintaining contin¬uous-caster steel mills is setting the correct caster roll pass line. Unlike using optics that requires at least 2 operators, the L-740 only requires one operator, and since the laser automatically sweeps a reference plane, it is a very simple process to measure and set the heights of caster segment rolls. The heights can be set using precision inserts with our targets, as the tolerance of the centerline of the target to its base has been accurately controlled. In addition, all the rolls of a segment can be checked from one setup. Furthermore, the laser can be set up between two segments and both of them can be checked at the same time from the same setup.
The flatness of the laser plane is the most important factor in determining the overall accuracy of the system for measuring flatness. No one surpasses the flatness of our laser planes. In a 180º sweep, our L-740's laser plane is flat to within ½ an arc second, (.00003"/ft or 0.0025mm/M) and in a 90º sweep, the laser plane becomes even flatter to within ¼ of an arc second (.000015"/ft or 0.001 mm/M).
PSDs (Position Sensing Detectors) are one of the critical components of our laser alignment systems. It is this PSD that senses the laser beam and turns it into a digital signal. This greatly reduces the man-to-man variability found in optical measurements because sophisticated electronics determine the measurement rather than the human eye. By relying on the PSD to produce highly repeatable measurements, our L-740 makes it much easier to hand off an alignment project from one crew to the next.
The L-740 Ultra-Precision Leveling Laser for Continuous Caster Alignment
The L-740 Ultra-Precision Leveling System offers the fastest, most accurate way of setting the pass line elevations on caster segments. With wireless targets offering resolutions down to .00002" (0.0005 mm), automatically sweeping laser planes and high-powered alignment software, the L-740 is the ideal alignment tool for caster segment applications.
Wireless Targets and Readouts
Hamar Laser’s A-1519-2.4ZB and A-1520-2.4ZB Wireless Scan Targets have up to a 1" (25 mm) measuring range, resolutions as low as .00002" (0.0005 mm) and can be used up to 133 feet (40 meters) from the readout. These targets also have height gage measuring capabilities, making them perfect for most steel mill alignment applications. Multiple targets can be used at the same time, allowing the use of multiple work crews to speed alignments.
Continuously Sweeping Lasers and Live Data Reduces Downtime
Both continuously sweeping lasers and live data output create a powerful combination to align segments up to 70% faster than traditional methods. 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 and axis must be measured before the straightness or flatness can be determined and the data provided is not even live.
Laser Planes Have 200' Range
One of the most powerful features of the L-740 is the automatically rotating laser plane with a range of 100 feet (30.5 meters) in radius. That means even the largest segments (or several segments) can be checked with one setup.
Alignment System Features
- Continuously sweeping laser plane with operational range of 100' (30.5 meters) in radius.
- Diode lasers 2 times more stable than HeNe based laser systems.
- Uses A-1519-2.4ZB Single-Axis Wireless Scan Target with 1" Range and .0001" (0.0025 mm) resolution for higher accuracy applications.
- Battery or AC powered.
- Laser plane is flat to ½ an arc second (.00003"/ft or 0.0025mm/M) in 180º sweep and 1/4 arc second (.000015"/ft or 0.001 mm/M) in 90º sweep.
- Backlit levels accurate to 1 arc second (.00006"/ft or 0.005mm/M).
- Typical setup time 20 minutes or less.
- Includes Pitch/Roll/Yaw base with coarse and fine adjustments.
- Completely self-contained.