"I understand that no adjustments (offsetting) should be made to the machine. But if set the machine up to the mean and run 100 consecutive pcs it will tell you how capable the machine is without operator making adjustments. But when your trying to hold a .001" total tolerance, adjustments will have to be made sooner or later during production"
Two different processes.
- Initial process capability study; 100/125 pc sample size, run parts with no adjustments to set-up, measure oarts, plot on chart, evaluate, make adjustments and re-run study.
- on-going process control; evaluate charts periodically, make changes when process shows evidence of gion out of control.