Electronics Forum: 1000 (Page 56 of 73)

Re: Product Segmentation in Pick Place Machines?

Electronics Forum | Mon Sep 13 10:55:44 EDT 1999 | K3 Equipment

| Okay guys (and my fellow lady lurkers), I am trying to determine WHAT the segmentation is for the products in the pick and place industry. | | For example, I know in screen/stencil printing, there are manuals, there are semi-automatics, mid- and h

Re: Classification of moisture sensitive devices

Electronics Forum | Sat Aug 28 08:41:12 EDT 1999 | Tom Tellinghuisen

Wolfgang, We also tried to find generic 'guidelines' for Moisture Sensitivity levels. It would be a perfect world, if you could say that all PLCC84's were level 4 devices. Unfortunately it is not that easy. Moisture sensitivity levels are

Re: Digital Camera

Electronics Forum | Tue Aug 24 02:21:32 EDT 1999 | Earl Moon

| This is out of the normal scope of this site but� | | I am in search of a Digital Camera for use with documentation instructions. What would be the Minimum Resolution that I should require? I will need details of assemblies such as Component Ide

Re: Digital Camera

Electronics Forum | Tue Aug 24 02:25:44 EDT 1999 | Earl Moon

| | This is out of the normal scope of this site but� | | | | I am in search of a Digital Camera for use with documentation instructions. What would be the Minimum Resolution that I should require? I will need details of assemblies such as Compone

Re: Digital Camera

Electronics Forum | Tue Aug 31 09:20:22 EDT 1999 | Jon Gruett

| | This is out of the normal scope of this site but� | | | | I am in search of a Digital Camera for use with documentation instructions. What would be the Minimum Resolution that I should require? I will need details of assemblies such as Compone

Re: electroformed stencils

Electronics Forum | Thu Jun 03 17:24:03 EDT 1999 | Steve A

| Hi everybody, | | Somebody know the advantages of electroformed stencils on laser cut stencils ? | | any coment is apreciated. | | | thanks | | Al | Hey Al, An Electroformed (an additive process) stencil is comparable quality wise as a laser

Re: Exhausting of flux in reflow ovens

Electronics Forum | Fri May 14 00:16:28 EDT 1999 | Mike D.

| Does anyone know of any industry guidelines for the exhausting of volatiles in reflow ovens? I've seen some numbers like 1,000ppm for the oven atmosphere, but is this typical? | | My concern is the volatiles in my WS629 solder paste may be attack

Discoloring of Soldermask and silkscreen

Electronics Forum | Mon Apr 12 19:28:26 EDT 1999 | Tom B

Netters, When I reflow a PCB there is a discoloration of silkscreen and mask. It appears if Profile is too hot! But I dont think so, maybe I'm wrong? 1. Kester 293 no clean 2. 2.1 C/s for 30s to 150 C 3. .5 - .7 C/s for 60s to 185 C 4. 1.5 C/s u

Re: Discoloring of Soldermask and silkscreen

Electronics Forum | Tue Apr 13 18:11:00 EDT 1999 | Jimmy Strain

| Netters, | | When I reflow a PCB there is a discoloration of silkscreen and mask. It appears if Profile is too hot! But I dont think so, maybe I'm wrong? | | 1. Kester 293 no clean | 2. 2.1 C/s for 30s to 150 C | 3. .5 - .7 C/s for 60s to 185

Re: Discoloring of Soldermask and silkscreen

Electronics Forum | Mon Apr 19 11:21:03 EDT 1999 | Travson

| Netters, | | When I reflow a PCB there is a discoloration of silkscreen and mask. It appears if Profile is too hot! But I dont think so, maybe I'm wrong? | | 1. Kester 293 no clean | 2. 2.1 C/s for 30s to 150 C | 3. .5 - .7 C/s for 60s to 185


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