TESA MH3D, Руководство пользователя

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User's Manual
MH3D
©2004 TESA Switzerland All Rights Reserved.
Page A-9
CCD Optical Probe - Measuring
The Fine Adjust is required for the MH3D for most measurement operations
using the optical probe.
When positioning the probe, hold the end of the Z-rail and not just the body of the
probe. Use the X anf Y fine adjusts for accurate positioning of the probe and use
the Z fine adjust for focusing.
The optical probe has a variable magnification up to 125X (250X if an auxiliary
lens is installed). To get the highest accuracy, zoom the probe to the highest
magnification. Use the lower magnification to get a wider field of view and a
larger depth of field.
It is helpful to consider the optical probe as a solid ball with a ball diameter of
zero or as an edge probe. You must "tell" the MH3D software when to record the
coordinates of the selected point on the part surface. This is done by pressing the
right hand button on the desk mouse.
The principles of referencing part features with the optical probe are similar to
those for projectors and measuring microscopes:
1. Manually position the probe so that the edge to be measured is in sharp
focus on the monitor screen.
2. Using the X and Y fine adjust mechanisms
of the MH3D, position the origin of the
reference crosshair on the edge to be
probed.
3. Record the coordinates of this point ("take
a hit").
4. Take more measurements on this edge or
go to another feature.
Note: The location of features is most easily done at the lowest magnification
settings. To get the highest measuring accuracy, however, the highest magnifica-
tion should be selected. When zooming during measurements, be sure that
parfocality and crosshair position are properly adjusted.