TESA-hite 400 / 700
3 DESCRIPTION OF THE COMPONENTS
3.1 Instrument base
The base is chemically nickel-plated in order to make it very resistant to corrosion. Its lower face,
which has been machined to ensure that it is rigorously flat, incorporates three finely-machined
support lugs that guarantee the stability of the TESA-Hite 400 700. These lugs form a large surface so
that any grooves or other similar irregularities in the surface plate can be comfortably cleared.
The lugs 6 (Fig. 1) are designed especially for supporting the TESA-Hite 400 / 700 against a parallel
rule or for guiding it along such a rule, for example.
3.2 Air-cushion base
The air-cushion base, which is generated by the
pneumatic system linked to the electric pump
integrated into the instrument, permits the height
gauge to be moved safely and easily. Once
activated, manually with the button 11 (Fig. 1), the
pump creates an air-cushion only a few µm thick
between the height gauge base and the surface
plate so that TESA-Hite 400 / 700 can be displaced
effortless and quite wear-free. The thickness of the
air cushion can be set according to the surface
quality of the granite plate. This is done by turning
screw (Fig. 3), which acts on the valve located into
the pneumatic system. Experience has shown that
the air cushion should not be thicker than
necessary. Once enabled, it has to support the
weight of the height gauge while contacting the
surface plate lightly.
Fig. 3
3.3 Vertical column, measuring head and movement of the head
The rigid vertical column is perpendicular to the base, to which it is permanently fixed. A measuring
head slides on the guide and the movement of the head is recorded by an opto-electronic measuring
system (TESA patent). The measuring head can be moved in infinitesimal increments by the fine-
adjustment system, for example when using fine probes or measuring small bores. The knurled
screw 9 (Fig. 1) is used to lock the measuring-head movement that is thus left free for scanning.
However, if necessary, the head itself can also be locked by using the built-in system. To do it, block
the handwheel by using the screw 8 (Fig. 1) and move the probe upwards to the stop.
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