2. HDV PRODUCT LINE DESCRIPTION
The HDV300 with 300 mm (or 12”) of travel and HDV400 with 400 mm (or 16”) of travel are hori-
zontal digital video comparators which combine the best features of a vision metrology system
and a horizontal optical comparator. They come with a 5-megapixel digital video camera and are
available with a choice of seven telecentric lenses that provide micron-level resolution and optical
distortion as low as 0.001% across the field of view (depending on the lens) for accurate field-of-
view (FOV) measurements. They are also available with 6.5:1 zoom optics. Six of the seven
telecentric optics and the zoom optics are mounted by means of a bayonet fitting and can be
changed by the user in a matter of seconds.
HDV300 and HDV400 systems are available in a manual version, where X-Y-Z positioning is by
means of handwheels, and in a CNC version, where motion is motorized and under computer
control. With the CNC version, X-Y motion can be under full software control, or under manual
control by means of a joystick unit. X-Y travel is 12” x 6” (300 x 150 mm) with HDV300 systems
and 16” x 6” (400 x 150 mm) with HDV400 systems.
All HDV systems come with MetLogix M3 touch screen software with the M3 DXF/FOV option
pack. With this software, they can import DXF CAD files over a network and make automatic 2D
go-no-go comparisons to an engineering design by using video edge detection (VED), with no
need for the screen overlays that would be required with an optical comparator. 2D geometric
functions include points, lines, circles, arcs, rectangles, distances, slots, angles and skew.
With 0.14X telecentric optics, field-of-view measurements can encompass an entire small part up
to 63 x 47 mm (2.47” x 1.85”) or a feature of a larger part. Field-of-view measurements can also be
seamlessly integrated with stage motion to measure larger parts.
HDV systems are rugged benchtop machines that are equally at home in a quality lab or on the
shop floor. The housing is built of welded steel like a Starrett comparator. The workstage of the
HDV300 is the same as for Starrett’s HB400 horizontal optical comparator, and the workstage of
the HDV400 is the same as for Starrett’s HD400 horizontal comparator. The stage is made of ma-
chined hardened aluminum and has two dovetail slots to allow the clamping of parts and fixtures.
Maximum workload capacity is 50 kg (110 lbs). Linear glass scales provide 0.5 µm (0.00002”) of
resolution to read stage motion. The computer and M3 controller are located inside the comparator
housing, resulting in a clean design with minimal external wiring. Air circulation and a slightly posi-
tive pressure are maintained inside the housing by a filtered fan. The system’s standard 24V fan
system is designed to provide cooling in relatively clean environments. An optional Clean Air Kit
comes with a more powerful 12V fan system and a large 300 x 300 mm (12” x 12”) filter designed
to trap dust and oil particles in dirtier environments, such as machine shops.
The main operator interface is a 24” touch screen video monitor, which displays a live video image
of the part in addition to geometry tools and digital readings. The image of the part can be resized
using pan and zoom, and measurements are taken by simply tapping a feature on the screen. An
environmentally sealed keyboard with an integral touchpad is also provided.
2.1 Ordering Options
Standard HDV300 and HDV400 systems come with a bayonet socket which allows optics to be
changed by the user in seconds. Available optics are telecentric optics with fixed magnifications
of 0.3X, 0.5X, 0.8X, 1.0X, 2.0X or 4.0X, and zoom optics with continuously adjustable magnifica-
tion from 0.7X to 4.5X.
The HDV 300 and HDV400 are also available as a dedicated system with non-changeable 0.14X
telecentric optics, which provides the system’s maximum of view of 2.47” x 1.86” (63 x 47 mm).
A cabinet stand is a required option if a customer-furnished benchtop is not available. Stands are
available with 24” (61 cm) or 32” (81 cm) height. A depth of 32” (81 cm) is required for mounting.
2.2 HDV System Specifications
Disclaimer:
Due to continual product improvements, specifications may change without notice.
Caution: Exceeding the maximum load capacity of 50 kg (110 lbs) will reduce accuracies of your
system and may damage the mechanical structure.
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