Robert Cronin Wrote: > We have discussed what would be a reasonable trace spacing from the > breakaway holes to prevent this occassional scrap from happening. The > initial figure of 0.200 inch spacing was deemed way to much by the > design community. Another suggestion of two times the board thickness > (0.124 inches in this case) was proposed. > > 1) Has anyone else seen similiar damage of this sort during breakaway ? > 2) Is there anyone who has experience with a miminum trace spacing from > breakaway holes that works well ? > 3) Is there an accepted standard or Rule of Thumb (such as two times the > board thickness) that anyone has used without incident in moderate > volumes (200 plus a month)? > > Thank You in advance for any comments. > Bob Cronin > Eastman Kodak > I have designs that have the 0.036" hole edge 0.050" from traces. To the best of my knowledge, this has not been a problem. I wonder if the boards are being twisted rather then snapped. Do you have a process description for the operators to follow regarding snapping breakaways? I can see where a twist would cause some problems. John Laur *************************************************************************** * 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. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************