Electronics Forum | Fri Sep 15 19:50:54 EDT 2000 | Murad Kurwa
Try IPC-SM-784 Guidelines for Chip-On-Board Technology Implementation (pg 16-17). Contact IPC or Document Center http://www.document-center.com/home for a copy. Goodluck Murad
Electronics Forum | Mon Jun 07 16:45:57 EDT 1999 | Dave F
| I was wondering what measurements are used to define pitch? | Frank: John's correct with the most common definition, but there can be others, depending on your perspective. TTYL Dave F Pitch. The center-to-center spacing between the (1) leads
Electronics Forum | Mon Jul 31 21:14:30 EDT 2006 | chrisgriffin
Does any one know how far left or right from center the aperatures can be? If I had a 6" board, and a stencil with cut-outs for both sides right and left of center, would I have problems?
Electronics Forum | Wed Jun 02 15:29:47 EDT 2004 | pr
Make sure the board is stopping at the center of the worknest or you will waste lots of time (you'll get software limit errors when you try to find fids.). If it's not in the center, you need to go in and reteach from scratch (doesn't take too long).
Electronics Forum | Mon Oct 31 08:29:51 EST 2005 | chunks
Shifting? Please describe the "Shifting". I.E. is it centering, sliding to cause shorts..... Most 208s will self center. If it's causing shorts, first check your print to make sure it is on the pads. Next check placement. Another area to check
Electronics Forum | Mon Sep 08 02:39:37 EDT 2008 | akareti
By connector, you mean socket? Connector use for board to board connection from FCI, MFG P/N: 84500-202 What is the material of the connector(socket)? Is it very frigale? Housing: liquid crystal polymer Solder ball: SnPb 63/37 how big are the bal
Electronics Forum | Thu Oct 19 14:20:18 EDT 2006 | sliebl
Something that I find unusual in some of the replies is the fact that local fids that are randomly dropped around the quad don't do anything for assisting the alignment of said quad. The only way that I am aware of the local fids being useful is if t
Electronics Forum | Fri Jun 29 18:43:16 EDT 2001 | procon
Dear Danial, The only stupid thought is the one left only as a thought and not asked. The size of the board and the placement of the BGA on the board could play a big factor during reflow. If you are processing boards on an edge conveyor and the boa
Electronics Forum | Tue Oct 20 11:37:38 EDT 1998 | Stefan Witte
All SM machines pick components with a vacuum nozzle. Most likely the component is picked in the geometric center, which may not be the center of gravity ( SOT 23, SO 89 ). Any other pick position than the center may be taught upon requirement, but y
Electronics Forum | Mon Jun 07 20:06:45 EDT 1999 | Frank
Thanks for the clarification! So in generic settings what are the normally the components with the smallest pitch? Will a machine with 20 mil capability handle almost anything? | | I was wondering what measurements are used to define pitch? | | |
