Electronics Forum: stencil (Page 481 of 575)

Re: bottom side epoxy

Electronics Forum | Thu Oct 07 09:59:01 EDT 1999 | Dave F

| I recently had the opportunity to visit the vendor who is making my boards. On my trip I noticed that the guy who was in charge of the SMD placement machine (brand new Samsung) still had to manuallly place about 20%-40% of the parts after placement

Re: First Article

Electronics Forum | Wed Oct 06 15:29:24 EDT 1999 | Tony

| Our first article inspection after machine placement can take several hours depending on the complexity of the board. The operator visually checks the board against the drawing and bill of material. I'd be interested to hear if there are any other

Re: Camelot Glue Dispenser Off-line Programming

Electronics Forum | Wed Sep 15 16:18:16 EDT 1999 | Jason Gregory

| | Does anyone know the best way to program my Camelot glue dispenser off line? I really like the machine, it just takes me too long to program it. We do contract work so I can get gerber data for all (most) of my assemblies. I need to get these p

Re: Tombstone

Electronics Forum | Tue Sep 14 10:54:37 EDT 1999 | Scott Davies

| Can anyone out there pls enlighten me on how to solve chip tombstone defects. | I am running a board with a lot of 0603 chip. i had fine the profile and the alignment, but it still happen randomly on the board itself. Is there any other way to sol

Re: Proflow of DEK screen printer

Electronics Forum | Tue Sep 07 12:02:30 EDT 1999 | Brad Kendall

| Dear sirs, | | If you have experienced Proflow of DEK screen printer, please let me know the details of it. | | Best regards, | | Jame Bond | | I have had Proflow for about 8 weeks now. I have had my fair share of problems with it. It does

Re: Solder paste tube disposal

Electronics Forum | Wed Sep 01 04:07:31 EDT 1999 | Brian

| Recently, our solder dross reclaimer refused to take our | used solder paste tubes. He said the small percent of paste | remaining in the tube is now considered hazardous waste. I'm interested in advice on how others are disposing of this "hazardou

Re: Where can I purchase a PCB with a bare copper grid for solder flux evaluations.

Electronics Forum | Mon Aug 30 16:10:10 EDT 1999 | Dave F

| I have looked through the IPC web page and surfed to frustration. Can somebody give me a lead? | Brian: We don't use an etched board. We use a special stencil, described below and print on bare copper laminate. 3 Solder Wetting Test. Recogniz

Re: screening adhesives

Electronics Forum | Sat Aug 28 14:23:52 EDT 1999 | JohnW

| Hi There, | | Could anyone please give me some pointers on screen printing non-conductive adhesives or where I could find the information avaliable. Aspects such as printing parameters, ideal stencil design and a general overview. Do already have

Re: Tombstoning of chip capacitors

Electronics Forum | Wed Aug 25 16:42:32 EDT 1999 | Dave

| | | | | | Could use a little help here. Can anyone clarify to me the cause and fix of chip caps/resistors tombstoning following reflow? | | | | | | | | | | | | Any help would be appreciated. Thanks. | | | | | | | | | | | Most common reason is

Re: Cylindrical diodes Missing during SMT process.

Electronics Forum | Tue Aug 24 05:11:32 EDT 1999 | George Verboven

| | Hello everyone, | | We found many cylindrical diodes missing during SMT process. Could someone tell us how to prevent this problem? Is it effective to change the shape of stencil apture or reduce fan speed in reflow oven? Thanks in advance. | |


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