Week 9 Performance Review Meeting Minutes

Week 9 Performance Review Meeting Minutes  Present Data to Bill & Mike

 Justify ANOVA assumptions

 Two Response (full factorial) o Standard deviation o Average pressure

 Average pressure taken from “whole” paper

 Better std dev. @ 1.9 degrees, 130 lbs per cell, portrait o Little effect from compliance

 Angle to minimize std. dev. = 1.91 degrees

 Observed that 1.9 degree skew dramatically decreases standard dev.

 Mike is concerned that other effects might make 2.4 degree skew or some other skew angle more optimal.

 “Tornado” look on versus fits of residual o Mirrored about x-axis because of 2 replicates . Std dev. About 2 points a concern

 Un-randomized the skew angle for ease of testing

 Might be useful to normalize standard deviation o Help to identify outliers

 P-values were a decimal place off in presentation slides

 Insert label differentiating between 2nd, 3rd, & 4th order interactions

 Factors we couldn’t control (load and paper orientation) o Load and orientation can be “set” or optimized because customer will want to change these based on what they are printing o We can’t say the best std. dev needs to be run at this orientation and load . No data if customer chose to run prototype at 250lbs o Compliance had little effect on std. dev or average pressure o So skew angle is only factor we can definitely control.

 Need signal / noise based on paper orientation o Get from minitab  Other factors we would have chosen: o Assembly method o Machine quality of rollers (tolerances, concentricity, etc)

 Mike would have fixed orientation and load and looked at factors customer would change that (+) or (-) affect uniformity

 Conclusion o Abaqus model on target o Several configurations fell into acceptable range. o No setup or paper orientation / load that can give us 10% pressure variation o Perhaps change resolution of scanner? (question for Tony) . Would have to rescan results

 Other suggestions: o Use std dev or five vertical lines of each run/test configuration

Prep for Final Review:  Capture data in ½ hour presentation  10-15 slides