Electronics Forum: 4.20 (Page 1 of 2)

Surface Tension vs Part Mass

Electronics Forum | Tue Sep 12 17:17:47 EDT 2006 | russ

what size part? I will almost guarantee that a 1/4- 20 nut will remove part during reflow if it will fit. Russ

Surface Tension vs Part Mass

Electronics Forum | Tue Sep 12 20:10:09 EDT 2006 | davef

Russ: You say, "I will almost guarantee that a 1/4- 20 nut will remove part during reflow if it will fit." What are you talking about?

Surface Tension vs Part Mass

Electronics Forum | Wed Sep 13 10:49:07 EDT 2006 | slthomas

1/4-20 would be unlikely to fit on an 0603 is all. I have to admit that when he first brought up the hardware theme I kept visualizing a jack screw assembly but the results I envisioned were less than ideal.

Process Characterisation

Electronics Forum | Wed Nov 29 06:38:18 EST 2000 | Chris May

Dear People, Can anyone point me in the right direction. I am involved in manufacturing low volume (batches of 4-20) pcb's. I have been investigating Process Characterisation ref EIA/JEDEC PUBLICATION 132. For such a low volume scenario, has anyo

Buying a new Reflow

Electronics Forum | Tue Jul 21 05:08:16 EDT 2020 | arty vesna

Hi there. I am currently kinda in the same spot as the author of the thread. My choice is between Rehm VXC and Heller 1809. I am a little concerned about Heller advertising their 25cm/10 in zones. I am used to large ovens designed for high throughput

Re: Process Characterisation

Electronics Forum | Wed Nov 29 21:05:33 EST 2000 | Michael Parker

Chris- you did not mention some details regarding your processes and volumes. Are you using SMT, PTH, mixed? Machinery involved (automatic vs. manual). Volumes - same 4-20 assemblies, at what periodic rate? Are you doing R&D prototypes only? High or

Can anyone say NOT to use my reflow profile???

Electronics Forum | Wed Apr 21 18:24:13 EDT 2004 | pjohnson@volterra.com

Simple process - we use similar Kester solder brands of "no clean" low residue solder wick to clean our pads, then brush with isopropyl, and apply Kesters brand of tacky flux under a Leica 6x microscope. We do this on 7x7mm and 9x9mm packages. This w

Re: Mechanical stencil foil tensioning

Electronics Forum | Sun Mar 07 13:10:15 EST 1999 | Sam Sangani

Has anyone used the mechanical stencil foil tensioning system from certain company that eliminates using stencil frames and epoxy & mesh? Any comments on whether it's worth looking into? We go through product revisions like we go through clean so

UP1500 Frame Sizes?

Electronics Forum | Tue May 03 21:46:13 EDT 2005 | KEN

I have 5 of these machines. What software version are you running. 24 inch frames will interfere with the USC. The solvent bar will ride on the stencil frame. This will not allow for a pre-load on the foil. 1. Adaptors suck! 2. Adaptors suck! 3

UP1500 Frame Sizes?

Electronics Forum | Tue May 03 22:53:54 EDT 2005 | MikeaJ

I 100% agree, KEN is absolutely right. If your machine is equipped with a stencil cleaner, and it is the original SMTech USC with the full length bar, you are in trouble already. If your software is of an earlier vintage, upgrade ASAP. Anything less

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