ICAR Technical Series no. 7 - Nitra Proc.

Effects of liner buckling pressure and teat lengthvacuum drop, the a- phases reduced from 185 to 102 ms (Figure 1). Thelength of the a- phases decreased with increasing TPD and BP effformingan undisturbed BP-sequence.Figure 2 illustrates the c- phase reduction with increasing TPD at 40 kPafor simultaneous and alternate pulsation, respectively. Data for 12.5 kPaBP effwas omitted for clearness because of overlapping with 13.6 kPa. The200a - Phase (ms)175150125100BP sequence (kPa)6,517,950 60 70 80 90 100 110 TPD(mm)Figure 1. A-phase reduction with increased liner Shore hardness and teatpenetration depth (60 c/min, 60% alternate, 40 kPa, 8 kPa vacuum drop).180c- Phase (ms)160140120alternatesimultaneousBP sequence (kPa)17,96,51008050 60 70 80 90 100 110 TPD(mm)Figure 2. C-phase reduction with increased liner Shore hardness and teatpenetration depth (60 c/min, 60%, 40 kPa).58Conference on "Physiological and technicalaspects of machine milking"