X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 2 [X] Return-Path: Received: from ms-smtp-01.southeast.rr.com ([24.25.9.100] verified) by logan.com (CommuniGate Pro SMTP 5.1.6) with ESMTP id 1857651 for flyrotary@lancaironline.net; Fri, 23 Feb 2007 07:44:34 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.100; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-103-061.carolina.res.rr.com [24.74.103.61]) by ms-smtp-01.southeast.rr.com (8.13.6/8.13.6) with SMTP id l1NChUQI014106 for ; Fri, 23 Feb 2007 07:43:30 -0500 (EST) Message-ID: <000901c75748$3ad13740$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Cooked Board - Really! Date: Fri, 23 Feb 2007 07:43:33 -0500 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3028 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 X-Virus-Scanned: Symantec AntiVirus Scan Engine Hi Finn, Yes, I've seen some experiments on the web using a fish tank pump hooked up to a similar de-soldering iron. Plain cotton - shouldn't be hard to find. Ed ----- Original Message ----- From: "Finn Lassen" To: "Rotary motors in aircraft" Sent: Friday, February 23, 2007 1:07 AM Subject: [FlyRotary] Re: Cooked Board - Really! > If solder wick doesn't work, you can buy a de-soldering iron/pump at > RadioShack for $10. > I have thought about removing the "bulb" from it and hooking it up to some > kind of vacuum pump. Would need some kind of collector in the line to the > pump to collect the solder. I think they use plain cotton in the pro rigs. > > Finn > > Ed Anderson wrote: >> Hi Chad, >> >> Appears there are many more ways than one to skin this cat. >> >> I've read of some using the Hot plate and one using a soup mug heater - >> amazing what will work. >> >> Appreciate the tips on soldering, I'll work on them. I find 0805 tiny >> enough , no 0603 or 0402 thank you {:>). >> >> Part of my personal problem is I only have one good eye, which means no >> binocular depth perception and no paraxial. It can be a bit of challenge >> to get a soldering iron and piece of solder and a component all at the >> same point in space at the same time {:>). >> >> That is one reason why I stopped building any circuits but those I could >> use a PC board for. >> >> The oven worked fine - but as you pointed out, you do have to move the >> board to the oven risking shifting some of the components or heaven >> forbid dropping the board. >> >> I've got two more boards to try. I may decided to iron solder the 0.25mm >> socket as the plastic stencil simply does not have the fidelity for the >> smaller traces. That is the only component that failed due to the solder >> bridges - and of course I can find my wick to try and pull the solder >> out. Got some out with a sucker but not enough. >> >> Thanks again for the soldering tips. >> >> Ed >> >> ----- Original Message ----- From: "Chad Robinson" >> To: "Rotary motors in aircraft" >> Sent: Thursday, February 22, 2007 9:32 PM >> Subject: [FlyRotary] Re: Cooked Board - Really! >> >> >>> Ed, try an electric hot plate. It's even easier to do - you can even put >>> the components on the board and then heat it up without having to move >>> it into the oven, risking knocking something off. >>> >>> If you get your temperature profile right, and use the right amount of >>> solder, the parts should self-align. Also, believe it or not, >>> hand-soldering these parts isn't as hard as it sounds. With a fine-tip >>> iron (I file mine to a sharp point) you just touch the iron to the >>> device's leg, and tap the solder there very quickly. It makes a quick, >>> tidy joint, and is almost as fast. I've been able to do 0.25 pitch and >>> 0603 parts this way. It sounds like a pain, but 99% of the work is in >>> the placement anyway. Tapping an iron on there quickly is a piece of >>> cake. >>> >>> If you use a good resin, and be sure to remove it with a cleaner, you >>> can make this even easier. You just put a dab of resin where you want >>> solder - a toothpick is perfect. Then tap a well-tinned iron to the >>> joint between leg and board, and the resin will suck the solder right >>> off the iron, exactly the right amount. I get perfect-looking joints >>> this way, and no mucking about with stencils and solder paste. >>> >>> Regards, >>> Chad >>> >>> Ed Anderson wrote: >>>> My highly advanced GE convection reflow oven cost $38.99 and that part >>>> of the experiment work perfectly. Besides, I don't have room for one >>>> that size, Mike {:>) >>>> The most difficult part of the experiment was placing the components >>>> without rubbing the solder paste off the pad and knocking another >>>> component askew. I now understand why they talked about "arm rests". >>>> It doesn't take much to get misalign. >>>> Ed >>>> >>>> ----- Original Message ----- >>>> *From:* Michael LaFleur >>>> *To:* Rotary motors in aircraft >>>> >>>> *Sent:* Thursday, February 22, 2007 8:40 PM >>>> *Subject:* [FlyRotary] Re: Cooked Board - Really! >>>> >>>> This reflow oven failed to sell at auction today for $750. >>>> >>>> >>>> Mike LaFleur >>>> >>>> ----- Original Message ---- >>>> From: Ed Anderson >>> > >>>> To: Rotary motors in aircraft >>> > >>>> Sent: Thursday, February 22, 2007 3:32:32 PM >>>> Subject: [FlyRotary] Cooked Board - Really! >>>> >>>> Well, today was the day. Got the missing SMD component in and I >>>> cooked my first SMD PC board in my new toaster oven. >>>> The results were not totally successful, but satisfactory in that >>>> it didn't come out too bad for a first try and I learned several >>>> things. >>>> Here are a few photos for those of you interested. >>>> Ed Anderson >>>> Rv-6A N494BW Rotary Powered >>>> Matthews, NC >>>> eanderson@carolina.rr.com >>>> http://members.cox.net/rogersda/rotary/configs.htm#N494BW >>>> http://www.dmack.net/mazda/index.html >>>> -- >>>> Homepage: http://www.flyrotary.com/ >>>> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >>>> >>>> ------------------------------------------------------------------------ >>>> >>>> -- >>>> Homepage: http://www.flyrotary.com/ >>>> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >>>> >>> >>> >>> -- >>> Homepage: http://www.flyrotary.com/ >>> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >> >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >> >> > > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/