Easson EX-100, Manual

Page: 17 / 33

16
Target: to make the measuring surfaces of two spherical measuring accessories parallel.
First, adjust approximately by using the method to search for the "turn-over point”
to find the minimum reading point; then replace the workpiece to see if the
readings are same at different positions. Finely adjust the screw according to the
reading differences.
5.1.2 Selection of measuring force
In order to ensure the measuring tip contact well with a workpiece, a measuring force will
impose between spherical cap-shaped measuring accessories and workpiece due to
the contact-type mode. However, the measuring force may result in elastic
deformation of measuring tip and workpiece. This will bring with error in
measurement, and it will recover by itself when the measuring force is eliminated.
The measuring force may be selected depend on the workpiece tolerance and
deformability. For workpiece with strict tolerance and easy to deformation, the
measuring force shall be minimized as possible. The measuring force is produced
by the weights (2.5N and 1.5N). Turn the button (31) shown in Fig.2 and open a
door to fetch weights. During measuring a large-size workpiece or using large-size
measuring accessories, apply a measuring force of 2.5N; during measuring a
small-size workpiece or using small-size measuring accessories, apply a measuring
force of 1.5N.
5.1.3 Selection of auxiliary worktable
In addition to the basic worktable, the EX-100 instrument has various worktables
to suit for different parts. The application range for various worktables is as follows:
Worktable type Workpiece type Drawing
No.
Basic worktable block gauge, square part, stub inner/outer
cylinder Fig.9
Single V-shaped carrier plug gauge, short shaft without central hole Fig.11
Double V-shaped carrier slender bar, ID micrometer standard bar Fig.8
Center carrier plug gauge, arbor, step shaft etc. with central
hole Fig.17
Round floating
worktable
ball, thread ring gauge Fig.18
Insulating worktable for
electrical measuring
accessories
measuring a hole with electrical measuring
accessories Fig.12
Tilted carrier External micrometer Fig.10
Cross-shaped carrier calipers
Fig.19
A pair of strip underlay sheet disk, ring diameter, internal /external Fig.9