ELBO CONTROLLI SETHY SIX, Инструкция по установке, эксплуатации и обслуживанию, Страница: 47 / 96

9 212V VISION SYSTEM ELBO CONTROLLI srl
SETHY SIX
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bring the image near the grid, making the analog comparator appear (micrometric movement)
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search for the maximum tangency point rotating the spindle while watching the analog comparator
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collimate the image with the grid, clearing the analog comparator to zero (micrometric movement).
9.5 Autocollimation
With autocollimation, it is not necessary to bring the image in collimation on a
fixed point on the screen; you just need to set the tool in the visual area of the
screen so that 212V can measure it.
Obviously, being able to measure on the whole shown area does not exclude the
need to focus the image and search for the maximum tangency to obtain the correct
measurements.
With autocollimation, the measurement is the result of the algebraic sum of the relative position of the
image displayed and the position of the central grid.
light differences in values, scanned automatically in different areas of the screen, are due to the working
tolerances of the lenses and the illuminator lenses, and to other optical, electronic and mechanical factors.
On the one hand, autocollimation measurement allows for greater speed and simplicity of measurement,
on the other hand it allows more tolerance compared to the same measurement taken on a fixed grid.
During this type of measurement, the display value is green.
procedure of collimation with autocollimation
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frame the tool on the screen (rapid movement)
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check that the tool’s cutting edge is clean from dust, chips or other impurities which could alter the
measurement results;
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focus the image on the axis that you want to measure rotating the spindle, numerically check that the
measurement taken expresses the maximum tangency of the tool.
9.5.1 Particular cases of collimation
212V automatically recognizes the orientation of the tool and measures it from the left or from the right
for the X axis and from above or from below for the Z axis.
When the tool is framed, the system analyses the image and sets the suitable collimation direction.
Only with autocollimation, priority is given to measurements from the left for the X axis and from above
for the Z axis; this means that with two valid measurements for the X axis, only the left one will be
considered.
Of course it is always possible to choose between autocollimation or collimation on a fixed grid: in both
cases 212V recognizes automatically the side of the tool to be measured.
Although 212V recognizes and measures the tool’s profile, there are particular cases in which the desired
measurement cannot be done automatically or with the help of digital comparators. This happens when
the point to measure is internal in respect of the shape of the tool.
In these cases measurement has to be done using the function “area of interest”: para. 9.8.8.
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