The L-740 Ultra-Precision Leveling System offers the fastest, most accurate
way of calibrating surface plate. With wireless targets offering resolutions
down to 0.00002" (.0005 mm), automatically sweeping laser planes and high-powered
alignment software, the L-740 is the ideal calibration tool for most surface
plate applications.
Unsurpassed Laser Plane Flatness
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 180-degree sweep the L-740's laser
plane is flat to within 1/2 an arc second (0.00003"/ft or 0.0025mm/M).
However, in a 90-degree sweep the laser plane becomes even flatter to
within 1/4 of an arc second (0.000015"/ft or 0.001 mm/M).
L-740 2X Faster than Other Methods
The L-740 is so quick at taking data that it can calibrate a surface plate
up to 2 times faster than any other method. In fact, most surface plates
can be analyzed and calibrated in about 15 - 20 minutes, including setup!
It also very simple to use as it has only 4 components: laser, target,
IR receiver and software.
Continuously Sweeping Lasers Require Only 1 Setup
Continuously sweeping lasers are much faster than interferometers and
autocollimators at calibrating surface plates because they only require
1 setup to calibrate a surface plate. With straight-line lasers, such
as an interferometer or autocollimator, there are at least 8 setups to
get enough data to calibrate the surface plate.
Grid Pattern Better Than Moody Union-Jack Methods
As the L-740 laser creates a reference plate from which to measure a surface
plate, it does not need to employ the complex Mood or Union-Jack methods
to "calculate" the flatness of surface plates. One problem with either
of those methods is that they can miss sometimes-large areas of the surface
plate where worn surfaces may be a cause for calibration errors. The L-740,
by contrast, can measure as much or as little of the surface plate as
desired as it uses a laser PLANE to measure the flatness plane of the
surface plate.
Plane5
Software Automatically Downloads Data Using Grid Pattern
Our Plane5 software automatically downloads flatness data using our A-908
IR Receiver, which connects to any laptop through the serial port. The
software utilizes a grid pattern to measure the flatness and can analyze
thousands of points for flatness. For data analysis, it uses a least-squares,
best-fit algorithm to calculate the flatness, which eliminates flatness
errors associated with the laser plane not being perfectly parallel to
the surface plate. It also identifies "bad" points by providing a 3D graph
of the flatness profile.
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
the flatness of even the largest surface plate can be checked with one
setup.
Wireless
Targets and Readouts
With Hamar's new line of wireless targets (A-1519, A-1519HR and A-1520)
there is no need to string long extension cords to reference targets.
The targets have up to a 1" (25 mm) measuring range and can be used up
to 100 feet (30.5 meters) from the readout. The new readout (R-1309) uses
a Cassiopeia PDA, 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. The A-1519 has a resolution
of 0.0005" (0.013 mm) A-1519HR has a resolution of 0.0001" (0.0025 mm)
and the A-1520 has a resolution of 0.00002" (0.0005 mm).
Wireless
Targets and Readouts