Electronics Forum | Fri Apr 18 11:05:47 EDT 2014 | horchak
First things first. Check the manufactures specs on the electrolytic caps as they may not be able to handle the lead free temps.
Electronics Forum | Thu Apr 24 12:18:01 EDT 2014 | cyber_wolf
You must thermally profile your circuit boards with a data-logger and thermocouples. Just putting in oven set points and looking at solder joints is not enough. Reference IPC-7530
Electronics Forum | Thu Apr 17 17:57:13 EDT 2014 | proy
Hello We use a 5 zone conceptronics HVN70 and never before have we had something we could not do including 6 layers Rohs complicated boards. Recently we had a larger - simple 2 layer board - all 1206's etc however there are 15 pcs of a LARGE high m
Electronics Forum | Wed Apr 23 09:38:05 EDT 2014 | rgduval
Get in touch with your paste manufacturer. They should have a data base of different oven types/zones, and can give you "baseline" settings for a medium thermal density board that has been proven to work well with their paste. After that, it sounds
Electronics Forum | Tue Apr 05 15:32:49 EDT 2011 | grahamcooper22
It is one of our pastes...Almit LFM48 W TM-HP, a high reliability no clean solder paste based on SAC305 with a size 4 powder. It's a paste that works so well we have thousands of users of it worldwide. Why are you using SN100C alloy paste ? I imagin
Electronics Forum | Wed Sep 03 07:39:19 EDT 2008 | pjc
You may not be getting enough exhaust pull, so the cooling modules over temp. Try swapping blower motors to isolate that before buying one. STANDARD AIR OPERATION: - Load-end: 150 cfm (255 m3/hr) at the 4� (102 mm) stack (minimum requirement) - Unlo
Electronics Forum | Thu Sep 04 02:43:09 EDT 2008 | benefon
Thanks This error only occurred with one oven profile with the reflow zone temperature set at 270�C. Perhaps it really has to do with the exhaust pull as the oven is operating very near its temperature limit with this profile. I will check that. Tha
Electronics Forum | Mon Dec 11 15:12:20 EST 2000 | accuspec
we are using alphametals no clean 95sn/5ag CL775 paste. After reflow there are solder balls on the board. mainly are around the cap. We are using a conceptronic concept 60 air. There are 4 zones with 8 chambers. We are not sure what the profile
Electronics Forum | Thu Sep 26 11:53:40 EDT 2019 | scotceltic
Experiencing some solder balls on an SSO-36 package. Things I am planning on checking are as follows: (not necesarilly in this order) I am just looking for a sanity check to see if you would try other things to help ? 1) Reflow profile. I have he
Electronics Forum | Tue Jun 17 07:17:09 EDT 2003 | James
The main problem I am having is getting the Rising slope 1-3 degrees. If I slow the conveyor down then I have too long of a reflow and if I speed it up then my ramp rate is too high. I was not sure if I need my first zones at a low temp or higher t
.gif)