Mitutoyo SURFTEST SJ-410 - Page 590

No. 99MBB765A
23-40
The space between two peaks is treated as 1 motif. Motifs appear based on the
following lengths and depths. The horizontal length of the unfiltered profile (motif
length ARi), the vertical distances from the 2 peaks to the floor (motif depth Hj and Hj
+ 1), and the shallower of the 2 motif depths, T. (In the following figure, Hj+1 is T.）
Motif
3. Compare and combine consecutive roughness motifs.
Combining motifs is subject to the following 4 conditions. Motifs can be combined only
if they meet all of the conditions. Repeat this operation until no more motifs can be
combined.
(Condition 1)
Among adjacent peaks, keep the tallest one. (If the center peak is taller than both
those on the right and left, do not combine motifs.)
Combining roughness motifs
(Condition 2)
After combining, the length of the new motif cannot exceed the upper length limit.
Motif length
H
j
H
j+1
ARi
Cannot combine motifs
Can combine motifs
P1
P2
P3
P2
P1
P3
ARi
After combining, ARi value ≤ A