Mitutoyo SJ-210 - Roughness Motif Parameters; R (JIS2001, ISO1997): Roughness Motif Mean Depth; Rx (JIS2001, ISO1997): Roughness Motif Maximum Depth; AR (JIS2001, ISO1997): Roughness Motif Mean Length

No. 99MBB122A
18-48
18.6.2 Roughness motif parameters
Roughness motif parameters
18.6.2.1 R (JIS2001, ISO1997): Roughness motif mean depth
R is the arithmetic mean of the roughness motif depths Hj obtained over the evaluation
length.



m
j
Hj
m
R
!
1
m: Number of Hj (twice the number of roughness motifs, n: m = 2n)
18.6.2.2 Rx (JIS2001, ISO1997): Roughness motif maximum depth
Rx is the maximum depth among motif depths Hj obtained over the evaluation length.
18.6.2.3 AR (JIS2001, ISO1997): Roughness motif mean length
AR is the arithmetic mean of the roughness motif lengths ARi obtained over the evaluation
length.



n
i
ARi
n
AR
!
1
H
1
H
j
H
j
+1
H
n+1
AR
1
AR
j
AR
n