Electronics Forum: 237 (Page 1 of 3)

Soldering problem with SMT Header

Electronics Forum | Tue Dec 02 08:51:31 EST 2003 | Daniel Werkhoven

Dear Frank, could it be that your component legs are coated with a leadfree finish? This can have an inpact on soldering when your temp.peak in only 220�C and the melting point of pure Tin is 237�C. Best regards, Daniel

Incomplete reflow

Electronics Forum | Sat Apr 05 21:51:42 EDT 2014 | garym4569

The 237*C is under the inductor with aTAL of 48s. I worked on the profiles this morning an got the max temp up a few degrees and the TAL to 62s. I will check the body temp of the Elec caps. The rest of the board has a max temp of 247. Thanks Gm

Incomplete reflow

Electronics Forum | Mon Apr 07 13:12:02 EDT 2014 | cyber_wolf

Gary, We are missing something here. I see no evidence of reflow at all. If you have a thermo couple under the inductor, 237 deg with a TAL of 48 seconds should work all day long.(even though it may be on lower end of process window) SAC melts at 21

Component Drop on Second side of the reflow

Electronics Forum | Mon Aug 14 04:00:25 EDT 2017 | sankarseptember

We check the TDK data sheet reflow profile condition. We check the PCB surface temperature the max temperature is 237.Anyhow We will confirm it by check temperature on TDK point

Tombstoning 0402

Electronics Forum | Thu Dec 21 19:24:25 EST 2000 | Alejandro Rodriguez Gallegos

Hi Sorry my poor english We have some problems with some componentes 0402 we recived by the manucterer oxide in the tape reells exactly in the bottom side to the reel I think the root cause is the oxide in the tapes rells What do you think? And ot

Re: Tombstoning 0402

Electronics Forum | Tue Dec 26 11:26:00 EST 2000 | acahill

If you have a known problem with the parts, then Reject them back to the Vendor. It appears that you have a solderability issue. As for Tombstoning on 0402 chips, this could trace back to the stencil design and/or machine placement. Define Tombstoni

SMT package types

Electronics Forum | Wed Oct 30 09:28:50 EST 2002 | gregp

How about your designator actually contains size info in a code. For example, SO14-237-050-090. That is "package type" - "width" (over leads) - "lead pitch" - "thickness". The problem with this is a great deal of thought has to be put in before comm

BGA Voids

Electronics Forum | Mon Feb 11 17:21:40 EST 2008 | larryd

What causes BGA voids over 25%? Have recommended profile for solder paste, hit 237C for 5 seconds and still get a void on 2% of specific BGA in various locations. BGA is FG676, 1mm pitch, on ImAg using lead free paste OM338 on a 6 layer FR4 PCB.


Electronics Forum | Wed Jun 02 11:58:20 EDT 2010 | palsingh

TDK RX-11 giving Absolute Encoder Backup Error (237-100) at start up. The machine resets pressing the button but gives X and Y axis hardware error while doing zero position. The X and Y axis does not even jog manually. I followed the manual instructi

Universal Axial Model 6287A communication

Electronics Forum | Tue Mar 06 08:03:42 EST 2018 | wolverine55

Thanks Don, I will pass this info on to the Maintenance department at the plant where this machine is located. I did see an exec stored in the machine's host computer while it was there, it was under a UIC filename of BC237A. They have new 3.6 volt

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