Mitutoyo SJ-210 - Page 404

18. Reference Information
No.99MBB122A
18-47
4. Modify the height (or depth) of tall peaks or deep valleys that stand out.
Calculate the mean depth and the standard deviation from the combined motifs.
HjHjH  65.1
Hj
Mean depth for motifs
Hj

Standard deviation for motif depth
From the above formulas, obtain the maximum value H.
Peaks and valleys in motifs whose motif depth is greater than H are modified so their
height or depth is H.
In the following figures, Zj+1 is modified to Zj+1'.
Replacing the H level
5. Calculate the parameters defined for roughness motifs.
Note 1. Certain parameters are calculated before the processing described in step 4
is performed.
H
j
Z
j
Z
j
+1
Z
j
+1
'
H
j
+1
Z
j
+2
H
H
j
Z
j
H
Z
j
+1
'
Z
j
+1
Z
j
+2
H
j
+1
Modif
y
in
g
a tall
p
eak Modif
y
in
g
a dee
p
valle
y