Lee, The responses you received to your question were very good and the information at Accusystem's FAQ is correct. We have used it several times to settle disputes with our customers. However, I think we can get closer to the source of your problem with a bit more information: 1. How are you measuring the board width: edge to edge or edge to some zero datum point on the board (such as an unplated hole)? 2. Is this a double sided board or a multi-layer board and what is the nominal board thickness? 3. Is the board scored in one direction only (width) or in two directions? You indicated that it was the width that was out of tolerance. 4. What is the tolerance now and how far out of 6 sigma is the width falling. Our experience as a board fabricator has been that this type of problem relates more to the dimensional stability of the substrate than the actual scoring equipment itself. Most scoring operations are performed in panel form and the panel is held in the machine at one end on tooling holes. If there is a dimensional shift in the panel length and/or width after hot air leveling (and there is always some) the score line spacing will be correct but the score line position relative to a datum feature may be out of tolerence. Hans Rohr Lee PengSoon-CPL035 wrote: > > Hi all, > We are have problem on oversize pcb width due to the bad cpk of the v-cut > location. > what is the v-cut tolerance should be set so that it is 6 sigma achieveable? > Any industrial standard?? > > Regards, > Lee ################################################################ TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################