Electronics Forum | Fri May 15 00:07:38 EDT 2015 | aapsmt
there can be so many different causes. can be component library height issues. step program z axis offsets - i have seen accidental positive values entered so the components are literally dropped onto the pcb haha. but it does depend on the size of
Electronics Forum | Tue Mar 04 11:47:58 EST 2003 | msivigny
Hello John, Your second statement is a little vague about the 16th card shutting down the line with the 2x240 QFPs misplaced... i'll try to interpret, assuming the cards are actual product, which I think they are, your 16th card failed because 2 out
Electronics Forum | Tue May 09 22:57:58 EDT 2006 | davef
The NexLev connector is built in a stripline construction, providing a continuous ground plane for each signal contact. The connectors come as tenrow connectors with 100, 200, or 300 positions at possible stacking heights from 10 mm to 30 mm. Technic
Electronics Forum | Mon Dec 04 11:14:03 EST 2000 | JimH
All, For what it's worth the only time I have experienced this phenom was when board support pins were misplaced on our chip shooter and these components (previously placed) were resting on the pins and cracking when we populated the other side o
Electronics Forum | Wed Sep 20 19:43:35 EDT 2000 | David Harper
We have the very same problem.. In our next job our assemblers will be placing 2 million PTH LEDs. Fortunately we get all out LED's from the same manufacturer and hope they come in bags. If not we gotta cut them off the tape.. and well... that just m
Electronics Forum | Wed Sep 20 19:44:04 EDT 2000 | David Harper
We have the very same problem.. In our next job our assemblers will be placing 2 million PTH LEDs. Fortunately we get all out LED's from the same manufacturer and hope they come in bags. If not we gotta cut them off the tape.. and well... that just m
Electronics Forum | Wed Sep 20 19:46:31 EDT 2000 | David Harper
We have the very same problem.. In our next job our assemblers will be placing 2 million PTH LEDs. Fortunately we get all out LED's from the same manufacturer and hope they come in bags. If not we gotta cut them off the tape.. and well... that just m
Electronics Forum | Wed May 24 15:45:38 EDT 2000 | JAX
John, Would you enlighten us to what machines you are talking about. I have never heard of such things. Typically, machines map out the boards with the locations of the fiducials relative to there CAD locations in order to account for stretch. Local
Electronics Forum | Wed Mar 03 00:20:08 EST 1999 | Clarissa Ortner
We are a small division. We are starting up a leadless line with an old screen printer and a convection oven. At this time we don't intend to get any sort of pick and place assistance and wil be loading by hand. We find the biggest problem with th
Electronics Forum | Wed Jun 10 14:48:12 EDT 1998 | Chrys
| | Does anyone have any info./studies on what the percentage or PPM defect rates are for each part of the typical SMT process. | | Example: | | Screen Print = 45% of total defects | | Component Placement = 25% of total defects |
