Kyu Son Is L-cut same as tab ou u-cut? shall appreciate clarification on this. We were doing sanding to file out extra tab material and burrs on v-scores. [log in to unmask] > ---------- > From: Steve Collins[SMTP:[log in to unmask]] > Sent: January 19, 1998 8:17 AM > To: [log in to unmask] > Subject: Re: [TN] BURR > > One Kyu Son would it be possible to get an example of the L-Cut you > are > talking about? I am putting a paper together for the upcoming IPC > conference it this would be good inf. to be incorporated. > > Thanks. > > Steve Collins > Antec Corporation > > ---------- > > From: CSS International Corp. <[log in to unmask]> > > To: [log in to unmask] > > Subject: Re: [TN] BURR > > Date: Friday, January 16, 1998 1:53 PM > > > > There are many ways you can try to control this process. > > > > First is to change the design to do more routing in the critical > dimension > > areas and then use the scoring (either L-Cut or V-Cut). > > > > Second is to use L-Cut (instead of V-Cut) as this will give you > better > > control on your burr dimension. And have a tight tolerance for the > upper > > and lower side offset. And minimized the web thickness as much as > possible > > without breaking them during component mounting. > > > > Third, you can use a side grinding machine to automatically sand the > edges > > if you do not have a dust problem. We have a unit we built by > ourselves > > which works very nicely. > > > > The dimension changes due to burr will depend on each type of board > (due > to > > glass size and structure) you are talking about as well as how you > > depanelize the boards. We did an extensive study with our customer > about > > five years ago. To get the exact record it will take too much time. > > > > We hope this helps a little. > > > > > > Best Regards, > > One Kyu Son > > > > > > > > At 05:39 PM 1/16/98 +0000, you wrote: > > > Good day Folks, > > > > > > We face dimension problem after depanellise the v-scoring > board. > The > > > board's thickness is 0.062" and the v-scoring remaining > thickness > is > > > 0.015". After depanellise, the board dimension is found to > increase > by > > > 0.01". > > > > > > According to the fab. house, this is caused by the burr > (protrusion) > > > after depanelling the board. > > > > > > Is there any standard spec. for the burr after depanelling the > > > v-scoring board? What is the general dimension tolerance used > in > > > design the board with v-scoring? > > > > > > > > > Thanks > > > > > > > > > Robert > > > > > >############################################################## > > >TechNet Mail List provided as a free service by IPC using LISTSERV > 1.8c > > >############################################################## > > >To subscribe/unsubscribe, send a message to [log in to unmask] with > following > > text in the body: > > >To subscribe: SUBSCRIBE TECHNET <your full name> > > >To unsubscribe: SIGNOFF TECHNET > > >############################################################## > > >Please visit IPC web site (http://www.ipc.org/html/forum.htm) for > > additional information. > > >For the technical support contact Dmitriy Sklyar at [log in to unmask] > or > > 847-509-9700 ext.311 > > >############################################################## > > > > > > > > > CSS International Corp. > > 460 Bergen Boulevard, Suite 209 > > Palisades Park, NJ 07650 U.S.A. > > Tel: 1-201-461-7205 > > Fax: 1-201-461-6374 > > E-Mail: [log in to unmask] > > > > ############################################################## > > TechNet Mail List provided as a free service by IPC using LISTSERV > 1.8c > > ############################################################## > > To subscribe/unsubscribe, send a message to [log in to unmask] with > following text in the body: > > To subscribe: SUBSCRIBE TECHNET <your full name> > > To unsubscribe: SIGNOFF TECHNET > > ############################################################## > > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for > additional information. > > For the technical support contact Dmitriy Sklyar at [log in to unmask] > or > 847-509-9700 ext.311 > > ############################################################## > > ############################################################## > TechNet Mail List provided as a free service by IPC using LISTSERV > 1.8c > ############################################################## > To subscribe/unsubscribe, send a message to [log in to unmask] with > following text in the body: > To subscribe: SUBSCRIBE TECHNET <your full name> > To unsubscribe: SIGNOFF TECHNET > ############################################################## > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for > additional information. > For the technical support contact Dmitriy Sklyar at [log in to unmask] or > 847-509-9700 ext.311 > ############################################################## > ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. 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