Anyone Weller WXMT with RTW10MS tip for desoldering SOIC8/16 experience? - Page 1
Forum section: electronics / general

author: Kjelt
author_rank: Super Contributor
timestamp: October 01, 2016, 01:44:11 pm
content: Hi,its kinda rediculous or I am not looking in the right places, but I seem unable to find any youtube movie or even a Weller document describing if the Weller RTW 10MS (10mm) is suitable for desoldering SOIC8 to SOIC16 ic's.I think seeing the shape of the tip it would be well suitable and probably its main purpose but where is the documentation?Anyone has this tip or the 11MS (6mm) and can share any real life experience using it to desolder a SOIC8/16 ?Thanks.

author: Howardlong
author_rank: Super Contributor
timestamp: October 01, 2016, 02:40:19 pm
content: I have the WMRT (looks like 24v version of the 12V WXMT but ISTBC) which I believe takesthe samesimilar tips, and use the RTW2, RTW3 and RTW4 for rework (not for initial placement on a virgin board) and I've used them for maybe ten years.The RTW4 has a 6mm blade. It'll remove SOIC8s and TSSOP16s. The RTW3 will remove SOT23s and MSOP10s. The RTW2 is meant for 0402/0603/0805 etc and will also remove SC70 and SOT23 with a bit of coaxing by feeding in extra solder.To be honest, for any parts with more than two connections, I find hot air is usually a better option. You risk damaging the board by lifting pads with these tips unless you know all the pins are heated.

author: Howardlong
author_rank: Super Contributor
timestamp: October 01, 2016, 02:57:39 pm
content: To add, I find Weller's product lines bewildering to say the least. I assume it's as a result of continual product refresh over the years, and at least they do continue to support older lines. That's good, because there stuff is generally built to last.If they would just add some clarity to their product roadmap it would be appreciated as it's a minefield.

author: Kjelt
author_rank: Super Contributor
timestamp: October 01, 2016, 04:30:11 pm
content: Thanks Howard for your clarification, so it would seem that this is the correct application.Those tips are €160 a piece so I think I will choose the 10mm instead of the 6mm then it will have more parts to handle.Hot air, well yes if you use for all the different packages different nozzles, otherwise I find you are heating up too much of the environment.Then it would be great if there was a temperatureresistant sucking cap in the middle of the nozzle where with vacuum it would lift the component.Never seen those myself.At this moment i heat up one side of the soic8 and lift it a bit, then the other half and remove the part. My guess is that a RTW10 will be a better option.

author: TopLoser
author_rank: Unknown
timestamp: October 01, 2016, 04:40:30 pm
content: Quote from: Kjelt on October 01, 2016, 04:30:11 pmWeller WRK kithttp://www.digikey.com/product-detail/en/apex-tool-group/T0051515599/T0051515599-ND/1801472

author: nctnico
author_rank: Super Contributor
timestamp: October 01, 2016, 04:55:27 pm
content: I second the suggestion for hot air. I use 7-SA tweezers (hook shaped) and hot air to remove chips from boards.At 40W I think the SMD tweezers may not be up to the task. Recently I tried to remove an SMT fuse from a 4 layer board with 2x40W tweezers from Ersa but there just wasn't enough power.

author: donkey77
author_rank: Regular Contributor
timestamp: October 01, 2016, 10:31:34 pm
content: Quote from: TopLoser on October 01, 2016, 04:40:30 pmI've got this kit to use on the setup I got from you Ian. Unless I'm being a div (quite likely) I'll be buggered if I can get it to work.