Wun Hung Lo reflow oven ? - Page 1
Forum section: electronics / general

author: nsayer
author_rank: Regular Contributor
timestamp: October 08, 2014, 04:49:53 pm
content: I've been using a toaster oven for, oh about a year now. It's fine, but it struggles to get all the way up during the reflow portion of the cycle. On a whim, I did a search on Amazon and, sure enough, they have a contender. Several in fact. Which all appear to be rebadged copies of the same thing. eBay has them too, strewn around at around a $200-$300 price range.The one that's... I dunno... the least "Wun Hung Lo" is this one:http://www.amazon.com/SMTmax-AS-5060-Reflow-Oven/dp/B004ZLIQX8But it appears to my eye to be exactly the same as this:http://www.amazon.com/AS-5001-Precision-Lead-Free-Reflow/dp/B003MRHKOWAnd nearly the same (perhaps larger?) ashttp://www.ebay.com/itm/T962A-REFLOW-OVEN-REWORK-STATION-EASY-TO-OPERATE-DIGITAL-OPERATE-ACTIVE-DEMAND-/111133114777Does anyone have any reports on how good these things are?

author: marshallh
author_rank: Unknown
timestamp: October 09, 2014, 12:54:50 am
content: Variants of the same chinese design. Out of the box they are complete trainwrecks. Some peopl have invested a lot of time to try and fix them, with varying success.IMO not a good buy, better to mod a solid convection toaster oven.

author: nsayer
author_rank: Regular Contributor
timestamp: October 09, 2014, 01:41:36 am
content: Thanks. I'll save up for a better one.

author: eurofox
author_rank: Unknown
timestamp: October 09, 2014, 08:01:20 am
content: Quote from: nsayer on October 09, 2014, 01:41:36 amI got the T962AI use it always for 1 PCB that I put in the center, I don't make any production and could not test if temperature is spread well in the corners.My unit doesn't smell like some people pretend.Reaction of the keyboard is very slow.For the rest it work OK for me.

author: sleemanj
author_rank: Super Contributor
timestamp: October 09, 2014, 08:42:17 am
content: http://dangerousprototypes.com/2013/02/14/workshop-video-55-infrared-reflow-oven-qinsi-qs-5100/

author: Kjelt
author_rank: Super Contributor
timestamp: October 09, 2014, 09:04:11 am
content: Better invest in a good quality programmable PID (if possible with a few memories for different profiles) with thermocouple and buy a good IR oven, perhaps add a few elements to get more consistent heating and fan. You don't need a fancy graphic lcd with the profile, you need a real time reliable and multipoint programmable PID that after programming and checking the curve with a temperature logger.

author: Falcon69
author_rank: Super Contributor
timestamp: October 10, 2014, 04:22:23 am
content: I did a good write up on a reflow oven I built. I will try and find the link, it Might help. It works pretty good.

author: nsayer
author_rank: Regular Contributor
timestamp: October 10, 2014, 04:29:25 am
content: Oh, I've built my own toaster reflow oven conversion. I am looking possibly to move up to something better so that I can use RoHS paste for shipping to Europe. My oven probably wouldn't make it all the way to 250 in a reasonable amount of time.

author: Kjelt
author_rank: Super Contributor
timestamp: October 10, 2014, 10:55:13 am
content: But you're oven can do the 230oC in that reasonable amount of time for the leaded paste?Than for the lead free paste you only need that extra 30oC, so you can either spend 2k$ for a decent mid pro oven (or 3-4k$ for a pro) or as I would do add and extra heating element and switch it on at just the right time to boost that temp another 30 degreesIf your oven insulation and wiring can handle it ofcourse but it is just a very small timeperiod.

author: nsayer
author_rank: Regular Contributor
timestamp: October 10, 2014, 01:21:19 pm
content: I'm sure there are other solutions. I posted here just to ask about the $500 one. And it appears that the consensus is that it's not worth it.

author: Kjelt
author_rank: Super Contributor
timestamp: October 10, 2014, 08:05:59 pm
content: Yes there are other solutions, i myself bought a second hand oven , the T100 from Beijing Torch company (what a name) anyway, after I reprogrammed the chinese PID (I had to hack it first because it was locked and nothing about how it operates in the manual) it follows the reflow profile pretty accurate. New they were I believe 2k$ but second hand I paid $700 so keep your eyes open and watch for opportunities.