This is Dataplot data file OCHOA2.DAT Minimization of Gas Metal Arc Welding (GMAW) Spatter 2**(8-3) Fractional Factorial Design with 3 "Center" Points Juan E. Ochoa-Saldivar (NIST: xxx) Number of observations = 35 (= 32 + 3) Number of variables per line image = 9 (= 8 + 1) Order of variables on a line image-- -1 "0" +1 1. Response 1 = Burn Through (1,2,3 = none,medium,severe) 2. Response 2 = Spatter (1,2,3,4 = below normal,normal (= 35 mm), above normal, severe) 3. Response 3 = Surface Appearance (1,2,3 = concave, normal (= flat), convex) 4. Response 4 = Weld Path Repeatability (1,2 = on track,off track) 5. Response 5 = # of Small Spatter on Workpiece 6. Response 6 = # of Medium Spatter on Workpiece 7. Response 7 = # of Large Spatter on Workpiece 8. Response 8 = Total # of Spatter on Workpiece -1 "0" +1 9. Factor 1 = Voltage (3 levels: 19, 21, 21) 10. Factor 2 = Amp = Wire Feed Rate (3 levels: 145, 155, 155) 11. Factor 3 = Travel Speed (3 levels: 85, 85, 100) 12. Factor 4 = Travel Angle (3 levels: 20, 27, 27) 13. Factor 5 = Work Angle (3 levels: 45, 60, 60) 14. Factor 6 = CTWD (3 levels: 10, 10, 13) 15. Factor 7 = Torch Offset (3 levels: 0, 2, 2) 16. Factor 8 = Gas Mixture (3 levels: 5, 5, 10) 17. Factor 9 = Random Run Sequence Note--This is not the Box, Hunter, & Hunter p. 410 2**(8-3) design. This design was created via 6 = 123, 7 = 134, 8 = 1245. To read this file into Dataplot-- DIMENSION 40 VARIABLES SKIP 50 READ OCHOA.DAT Y1 TO Y8 X1 TO X8 SEQ BT SP SAW PR SPS SPM SPL SPT V WFS TS TA WA CTWD TOJ GM SEQ Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 X1 X2 X3 X4 X5 X6 X7 X8 SEQ ----------------------------------------------------------------------- 1 3 3 1 2 2 0 4 -1 -1 -1 -1 -1 -1 -1 +1 19 1 3 1 2 0 3 1 4 +1 -1 -1 -1 -1 +1 +1 -1 16 3 4 3 1 3 0 0 3 -1 +1 -1 -1 -1 +1 -1 -1 3 1 2 1 1 6 2 0 8 +1 +1 -1 -1 -1 -1 +1 +1 11 1 3 1 2 6 0 1 7 -1 -1 +1 -1 -1 +1 +1 +1 23 2 2 3 1 6 0 0 6 +1 -1 +1 -1 -1 -1 -1 -1 4 1 2 1 2 5 0 0 5 -1 +1 +1 -1 -1 -1 +1 -1 27 3 3 1 1 3 2 0 5 +1 +1 +1 -1 -1 +1 -1 +1 14 1 4 1 2 5 0 1 6 -1 -1 -1 +1 -1 -1 +1 -1 24 2 4 3 1 0 0 3 3 +1 -1 -1 +1 -1 +1 -1 +1 7 1 3 1 2 7 2 2 11 -1 +1 -1 +1 -1 +1 +1 +1 21 1 3 3 1 2 0 3 5 +1 +1 -1 +1 -1 -1 -1 -1 6 1 3 3 1 2 0 0 2 -1 -1 +1 +1 -1 +1 -1 -1 32 1 3 1 1 6 4 2 12 +1 -1 +1 +1 -1 -1 +1 +1 33 1 2 3 1 4 0 1 5 -1 +1 +1 +1 -1 -1 -1 +1 2 1 4 2 2 5 1 1 7 +1 +1 +1 +1 -1 +1 +1 -1 30 1 1 3 1 5 0 0 5 -1 -1 -1 -1 +1 -1 -1 -1 12 1 1 1 1 4 0 2 6 +1 -1 -1 -1 +1 +1 +1 +1 26 1 1 3 1 0 4 1 5 -1 +1 -1 -1 +1 +1 -1 +1 13 1 2 1 1 5 0 0 5 +1 +1 -1 -1 +1 -1 +1 -1 29 1 2 3 1 3 0 0 3 -1 -1 +1 -1 +1 +1 +1 -1 28 1 2 3 1 1 0 0 1 +1 -1 +1 -1 +1 -1 -1 +1 10 1 1 3 1 7 1 0 8 -1 +1 +1 -1 +1 -1 +1 +1 5 3 2 1 1 2 0 0 2 +1 +1 +1 -1 +1 +1 -1 -1 25 2 2 3 1 6 2 3 11 -1 -1 -1 +1 +1 -1 +1 +1 34 1 3 3 1 5 0 0 5 +1 -1 -1 +1 +1 +1 -1 -1 15 1 2 1 2 1 0 0 1 -1 +1 -1 +1 +1 +1 +1 -1 9 3 4 1 1 2 0 1 3 +1 +1 -1 +1 +1 -1 -1 +1 22 3 3 1 1 2 0 3 5 -1 -1 +1 +1 +1 +1 -1 +1 8 1 3 2 1 10 0 1 11 +1 -1 +1 +1 +1 -1 +1 -1 31 2 4 3 1 4 0 0 4 -1 +1 +1 +1 +1 -1 -1 -1 20 1 1 1 2 2 0 1 3 +1 +1 +1 +1 +1 +1 +1 +1 17 1 1 1 1 6 0 2 8 0 0 0 0 0 0 0 0 1 1 2 1 1 1 0 1 2 0 0 0 0 0 0 0 0 18 1 2 2 1 3 1 0 4 0 0 0 0 0 0 0 0 35