Electronics Forum | Thu Mar 15 08:16:28 EST 2001 | davef
In a similar conversation ... Alex Krstic, NovAtel Inc. said ... Hello all. We recently received some boards with some of the chip resistors placed with their resistive elements towards the board. J-STD-001B and C view this as violation for both Cl
Electronics Forum | Thu Jan 04 08:33:08 EST 2007 | davef
You cannot determine foil thickness from its weight per area, because of the significant variation in the density of electrodeposited [ED] copper. But people don't care. They do it regardless. (oz/ft2)||(mils)||(mm) 1/2||0.7||17.8 1||1.4||35.6 2||2
Electronics Forum | Thu Nov 11 14:13:57 EST 1999 | Dave F
Thomas: From what you're telling us, you seem to be thinking correctly: 1 Paste should not spread appreciably in preheat 2 Something has changed, because you've not had this problem, until recently Two things to consider: 1 Has any thing changed
Electronics Forum | Mon Nov 15 21:35:50 EST 1999 | Dave F
Bob Bob: Fortunately, you found this before you built-up a lot of product. Some thoughs and other drivel: 1 Use IPC-TM-650, Method 2.4.8 for copper peel with a Instron machine. Typical pad peel strength requirement for FR-4, 2 oz. copper is: 6 l
Electronics Forum | Thu Apr 24 20:39:01 EDT 2003 | davef
3NaH2PO3 + H2SO4 + 2H2 + Ni^0 Potassium is co-deposited with the nickel, as follows: H2PO2^- + Hads => H2O + OH^- + P 3H2PO2^- + P => H2PO3^- + H2O + 2OH^- Nick Biunno gives a very short, over simplified summary: "Everybody looks at the nickel, b
Electronics Forum | Thu Feb 04 02:46:39 EST 2010 | dilogic
OK, here we are: 1. OS is OS&2 2. Sw. is USOS V1.14 3. GSM1 4. 2 Flex2 heads 5. Problem is on the front head 6. No 7. No 8. It just stops in the middle of the placement phase, with the head over PCB area. Usually 2 parts are still held on the nozz
Electronics Forum | Mon Nov 05 20:34:03 EST 2001 | davef
What�s the problem? There area many heat related failure mechanisms in bare boards. You can damage boards with heat several ways. A couple favorites [Don�t try this at home. Perform on a closed track by professional solders only.] are: * Put a
Electronics Forum | Thu Jul 15 21:10:53 EDT 1999 | Scott McKee
| I was wondering if someone could help me with a little problem I am Having with a MyData TP-11 UFP running TPSys 1.4.2. Early this week the machine crashed and I had to reload the software. I re-insatalled Venix then the CP4 driver then TPsys and S
Electronics Forum | Fri Jul 16 05:48:06 EDT 1999 | Wayne Sanita
Give Mydata a call as Scott said, they will take step by step over the phone. Wayne | | I was wondering if someone could help me with a little problem I am Having with a MyData TP-11 UFP running TPSys 1.4.2. Early this week the machine crashed an
Electronics Forum | Wed Oct 28 02:03:18 EST 1998 | Erhard Hofmann
| | | We currently using the Panasert SMT machine where PCB flow | | | direction were from right to left, & we are planning to move | | | in the FUJI -CP3 & CP4-2 in line where standard PCB | | | flow direction were left to right. | | | Any comment o