Electronics Forum | Mon Sep 10 14:42:42 EDT 2007 | cyber_wolf
How big is the cap ? We successfully reflow caps that measure aprrox .750" x 750" at the base and are .678" tall. The ovens we use are Vitronics XPM's.(1230,1040 and 930) We also process these caps through our Omniflow 10. As stated, oven length wi
Electronics Forum | Thu Jun 19 15:52:16 EDT 2008 | guqing
So correct me if I'm wrong: you are using a conventional oven (not VP, otherwise you must have mentioned), your big electrolytic caps go through a lead-free profile, which requires 30sec minimum at 230, but your time above 200C on the caps is less th
Electronics Forum | Thu Jul 16 06:24:23 EDT 2020 | indhu
Hi, I recently joined the SMT manufacturing here. I had problem with heavy pallets as it stuck between conveyors. So, I had reduced the pallet thickness by big opening for the pallets. Now, I'm encountering another issue the pallet warpage after refl
Electronics Forum | Fri Sep 07 14:55:25 EDT 2007 | jseagle
Change to through hole or hand solder. we are in the same boat and have not foound a reflow solution. James
Electronics Forum | Mon Sep 10 11:16:37 EDT 2007 | russ
Can you implement a longer soak? how many feet of heat do you have in oven? Russ
Electronics Forum | Thu Jun 19 12:48:32 EDT 2008 | mumtaz
What the hell our you talking about 200 c max? I would think any nolead part is capable of going hi-er that this. I think you are looking at max temps or something that does not make sents for temps you need to reflow.
Electronics Forum | Thu Jun 19 14:33:57 EDT 2008 | realchunks
My board reaches 240 C for 45 seconds. Most of my lead free parts require 230 C for a minimum of 30 seconds.
Electronics Forum | Thu Jun 19 11:43:05 EDT 2008 | Roy
When the component suppliers specify the cap as no more than 50sec (or even less time)above 200C, is there any way the lead-free profile window will fit if we wil have to achieve a peak temp of 230c for at least 30sec for the lead-free process? maybe
Electronics Forum | Thu Jun 19 12:07:09 EDT 2008 | ck_the_flip
You answered your own question! Vapour phase is the way to go for this. Conventional ovens won't allow this, unless you find away to defy Physics. That's an absurd constraint to begin with: 200C. Most Sn-Pb profiles require 205 - 210 minimum for
Electronics Forum | Thu Jun 19 12:27:14 EDT 2008 | guqing
Thanks CK. You are right the 200C constraint is absurd, but it's the reality, and the worst is this kind of components will go through lead-free profile. Do you or any body here experiencing the same problem? any body using Vapor phase and having suc
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