I am involved with an improved outerlayer registration method and am trying to: a) Correlate improved performance data that I have collected with the theoretical accuracy limits. b) Understand and quantify the tangible customer benefits of improved annular ring tolerance. I would appreciate any assistance to obtain the following information: 1) The typical distribution of drilling error. 2) Drill positional error (wander) as a function of the drill diameter. 3) Drill positional error (wander) as a function of stack height. 4) Drill life as a function of drill diameter. 5) Drilling tolerances that you experience. 6) Answers to any questions that an imaging person didn't think to ask about drilling. Of additional interest would be a function or spreadsheet that would model drilling performance. Thank you in advance: Bert Ohlig OLEC Corporation [log in to unmask] 714 930 2500 714 930 2506 Fax *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************