Does anybody having experience with CAB Maestro $M PCB cutter. We are facing problem with at least one assembly where components at proximity of v-grooves are getting damaged. We are not sure whether this problem is due to cutter process or the design of the panel itself. The IPC-SM-782 AUG1993) does not clealy elaborate on the min space between the edge of groove and the nearest component. Can anybody explain on this ? The board is 2 layer smt on top side 0.095 inches thick v-groove is 0.050 inches wide, 60 degrees and uncut is 0.020 inches. material of laminate is FR4.The nearest component to the edge of groove is 0.5 mm(0.020 inches) away and it is ceramic capacitor 0.85 mm high. The cutter blade top and bottom are 10 degree and edges are at same level . Cut is made in single pass and board is held without fixture. Technical advise on this will be highly appreciated. Thanks. ---------- From: Steve Collins To: Ed Gavin Cc: IPC Subject: Re: FAB - Scoring PCB panels Date: Friday, May 02, 1997 7:36PM Ed, When call out a V-Groove spec be sure spec material remaining not what is removed. Also be sure that the v-grooves are perpendicular to each other not off set. We typ spec for FR-4 .018-.024 and for MC-3 material .030 - .040. This inf. for .062 thick boards. Also be careful using scoring because at one time there were two different processes to do this. One was to use a machine that really looked like a pizza cutter and all it did was break the first two layers of glass and did not work well with FR-4 material. The second is actually cutting material away and this is referred to as V-Grooving. Unfortunately the terms are used generically and one needs to be careful if they are using a supplier that has one of these older processes still in use. Hope this is helpful. Steve Collins PCB Design Supervisor Antec ---------- > From: Ed Gavin <[log in to unmask]> > To: [log in to unmask] > Subject: FAB - Scoring PCB panels > Date: Friday, May 02, 1997 8:04 AM > > On 0.062 inch thick boards, we currently call for a 30 degree score, > 0.020 inch deep on opposing sides of the board. > We are trying to develop our standard for scoring. Is this what most use > for scoring? > Do you score boards thicker than 0.062 and if so what dimensioning do > you use for those? > If given the choice would you select scoring over routing? why? > > Thought this might be of general interest to the board community. > > *************************************************************************** > * TechNet mail list is provided as a service by IPC using SmartList v3.05 * > *************************************************************************** > * To subscribe/unsubscribe send a message <to: [log in to unmask]> * > * with <subject: subscribe/unsubscribe> and no text in the body. * > *************************************************************************** > * 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] * > *************************************************************************** *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * 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] * *************************************************************************** *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * 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] * ***************************************************************************