Steve - Virtually all placement machines that I am aware of are able to place your R's and C's at a 20 degree angle. Assuming the assembly house is using reflow soldering, then the only areas of significant concern are stencil printing of the solder paste, solder paste inspection (if it is automated), and board inspection after assembly. If your assembly house is using wave soldering for chip components, than that is an entirely different issue, and the chip components would be much more difficult and expensive to solder. Additionally, the layout of the other components on the board would have a major impact. My suggestion is that whomever the project leader is needs to contact your assembly house so they can review your proposed layout. I think you have an uphill battle unless there are significant overriding technical issues. Normally, R's and C's, as well as all components are mounted at 90 degree angles. This makes manufacturing's assembly processes much more straight forward, and the costs are much less than developing unique processes and fixture designs to accommodate your unique layout. Ed Valentine Electronics Manufacturing Solutions 8612 Mourning Dove Road, Raleigh, NC 27615 Phone: (919) 270-5145, Fax: (919) 847-9971 Email: [log in to unmask] Website: http://www.ems-consulting.com ----- Original Message ----- From: "Thomas, Stephen" <[log in to unmask]> To: <[log in to unmask]> Sent: Wednesday, February 07, 2001 6:55 AM Subject: [DC] SMD passives placement angle. > As I can't easily talk to my assembly house, can anyone help with the > following questions please. > > I have a design on which it would be desirable to place a array of passive > components (0603 Rs and Cs) at a 20 degree angle to the horizontal. The > questions are will this cause problems on the assembly machine ? or are all > SMD assembly machines capable of all angle placement these days ? If all > angle placement is common place what is the most common angular increment. > > Thanks for your help. > > Steve > > ========================================================= > Scientific Generics Ltd Tel: +44 (0) 1223 875 200 > Harston Mill Fax: +44 (0) 1223 875 201 > Harston http://www.generics.co.uk > Cambridge > CB2 5GG UK > Registered in England No 2081960 > ========================================================= > > -------------------------------------------------------------------------- ------- > DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 1.8d > To unsubscribe, send a message to [log in to unmask] with following text in > the BODY (NOT the subject field): SIGNOFF DesignerCouncil. > To set a vacation stop for delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL > Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional > information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 > -------------------------------------------------------------------------- ------- --------------------------------------------------------------------------------- DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF DesignerCouncil. To set a vacation stop for delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------