I'm assuming the board is a multilayer, not having looked at the images. Make sure the multilayer lamination pressures,cure time, and temperature are correct to effect good drilling performance. -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Franklin D Asbell Sent: Monday, March 29, 2004 5:46 PM To: [log in to unmask] Subject: [TN] Hole wall quality I've been asked to evaluate some images, hole wall plating defects, and try to locate the cause. The information available to me are these are drilled 0.021" holes, they were drilled one panel up, four panels total, and there was only one 0.021" tool per spindle. The spindles were new or repoints. Upon evaluating the bits nothing really jumped out as bad...another image not posted shows excessive nailheading. I'm open to any and all comments...as well as a list of items I can begin checking...thanks I've posted the images at http://asbell.net/images.htm Franklin --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------