No. 99MBB122A
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18.5.17 Ppi (Free): Peak count ....................................................................................................... 18-30
18.5.18 Δa (ANSI, Free): Slope of the arithmetic mean (angle of the mean slope) .................. 18-30
18.5.19 RΔq (ISO1997, JIS2001, ANSI, VDA, Free): Mean square slope
(angle of the mean square slope)..................................................................................... 18-31
18.5.20 lr (Free): Expansion length ratio....................................................................................... 18-31
18.5.21 mr (JIS2001, ISO1997, ANSI, VDA, Free): Material-ratio-length rate............................. 18-31
18.5.22 mr[c] (ISO1997, JIS1994, 2001, VDA, Free), tp (ANSI): Material-ratio length rate........ 18-32
18.5.23 δc (JIS2001, ISO1997, VDA, Free), Htp (ANSI): Slice-level difference (plateau ratio) . 18-33
18.5.24 tp (ANSI): Material-ratio length rate ................................................................................. 18-33
18.5.25 Htp (ANSI): Slice-level difference (plateau ratio) ............................................................ 18-33
18.5.26 Rk (JIS2001, ISO1997, VDA, Free): Enabled-material-ratio roughness
(center height) .................................................................................................................... 18-34
18.5.27 Rpk (JIS2001, ISO1997, VDA, Free): Initial abrasion height (peak height)................... 18-35
18.5.28 Rvk (JIS2001, ISO1997, VDA, Free): Valley depth........................................................... 18-36
18.5.29 Mr1 (JIS2001, ISO1997, VDA, Free): Material-ratio length rate 1
(upper relative-material-ratio length) ............................................................................... 18-37
18.5.30 Mr2 (JIS2001, ISO1997, VDA, Free): Material-ratio length rate 2
(lower relative-material-ratio length)................................................................................ 18-38
18.5.31 A1 (JIS2001, ISO1997, VDA, Free): Peak area ................................................................. 18-39
18.5.32 A2 (JIS2001, ISO1997, VDA, Free): Valley area ............................................................... 18-40
18.5.33 Vo (Free): Volume measure ............................................................................................... 18-41
18.5.34 BAC: Material-ratio profile ................................................................................................ 18-42
18.5.35 ADC: Amplitude distribution curve .................................................................................. 18-43
18.6 Motif-related Parameters .......................................................................................................... 18-44
18.6.1 How to obtain roughness motifs ...................................................................................... 18-44
18.6.2 Roughness motif parameters ........................................................................................... 18-48
18.6.2.1 R (JIS2001, ISO1997): Roughness motif mean depth............................................. 18-48
18.6.2.2 Rx (JIS2001, ISO1997): Roughness motif maximum depth ................................... 18-48
18.6.2.3 AR (JIS2001, ISO1997): Roughness motif mean length ......................................... 18-48
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