[sdiy] SMD rework equipment

Jason Proctor jason at redfish.net
Fri May 20 22:59:03 CEST 2016


thanks for the info, all. much appreciated.



On Fri, May 20, 2016 at 10:31 AM, <sleepy_dog at gmx.de> wrote:

>
> Ah, yeah that wasn't clear maybe, I was assuming boards which are made
> with hand-soldering considered. I wouldn't make super tight boards with
> components which are hard to solder without desoldering the *same*
> component at the other pad unless you use a tiny tip. I find that too much
> effort. Also, I can get 2-layer boards made much cheaper at a place which
> can only do 9..10 mil clearance or so anyway with their old tech (it barely
> works for QFP, with a modified, thinned pattern, but it allegedly does),
> which is nicer if I have to pay for it, not the employer ;-)
>
> Steve
>
>
>
> Am 20.05.2016 um 17:30 schrieb Jay Schwichtenberg:
>
>> Having good tools and knowing how to do SMDs is one thing and can get a
>> pretty good job done.
>>
>> But the to me the real critical part of doing SMDs is having good eyes
>> and a
>> steady hand.
>>
>> I don't mind doing boards that are SMD meant to be hand soldered verses
>> ones
>> that were made for machine assembly. Hand soldered ones can use 0805/1206
>> parts and spread them out. Machine ones usually have 0603s close
>> together. I
>> have some MI boards and they look doable by hand. But it's going to take
>> some planning to solder without problems. A lot of the parts are close
>> together and if you solder one side of one part you'll probably unsolder
>> the
>> connected side of another part.
>>
>> Good luck.
>> Jay S.
>>
>> -----Original Message-----
>> From: Synth-diy [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of
>> sleepy_dog at gmx.de
>> Sent: Friday, May 20, 2016 4:25 AM
>> To: synth-diy at dropmix.xs4all.nl
>> Subject: Re: [sdiy] SMD rework equipment
>>
>>
>> Ha!
>>
>> And I thought  I'm the only one (besides that lively Aussie dude on YT,
>> and one EE friend) who does his QFP (incl. single pins -> wire) and 0603
>> soldering with a 3mm chisel tip :-D
>> And pointy tips *sniff* only for crowded in-case situations. I'm not a
>> pro, can only say, for me, this works nicely, and I find pointy tips
>> mostly a PITA to work with.
>>
>> Interesting mention of webcams as cheap microscope replacement here... I
>> might want to try that one out. So far I've done things like, put on
>> ballistic eye glasses and have my eyes real close to the PCB :-D
>>
>> Steve
>>
>> Am 20.05.2016 um 09:04 schrieb Roman Sowa:
>>
>>> The best iron is the one you are feeling comfortable with. Sharp tips
>>> give you access to very dense areas, but they can't give much heat so
>>> working on something bigger than 0402 is not so fun. Has it's use only
>>> where nonthing else can reach. Regular tip and flux gel make wonders.
>>> Stereovision microscope is a must. Magnifying glass leads to dizzyness
>>> and headaches, cameras introduce lag and noise and are only 2D, also
>>> not very nice.
>>> Also helpful: hot tweezers with set of tips for various tasks,
>>> preheater when you have huge board with a lot of copperfill,
>>> soldersucker for cleaning holes from solder, solderwick for cleaning
>>> SMD pads, and good supply of flux gel, maybe also Kapton tape for
>>> protecting near-by-rework area, especially when using hotair gun. And
>>> hot air of course, very popular in rework services, but I never used
>>> it. Did I mention flux gel?
>>>
>>> Roman
>>>
>>> W dniu 2016-05-20 o 02:09, Jason Proctor pisze:
>>>
>>>> thanks for the info, all.
>>>>
>>>> i have a Weller WTCPT iron, which has been a trusty servant. can i make
>>>> this iron more suitable for SMT stuff, or are other irons (i see Metcal
>>>> is popular) just more appropriate?
>>>>
>>>> any tips for steadying oldish hands while doing delicate work? i did
>>>> wonder whether our EMS had a setup where nothing was hand-held. do such
>>>> arrangements exist?
>>>>
>>>> thanks much!
>>>> Jason
>>>>
>>>>
>>>> On Thu, May 19, 2016 at 4:57 PM, charlie wallace
>>>> <charlie at finitemonkeys.com <mailto:charlie at finitemonkeys.com>> wrote:
>>>>
>>>>      Trinocular boom from amscope with usb camera or a mantis from eBay
>>>>      Metcal from eBay
>>>>      Solder sucker
>>>>      Wiha esd tweezer set
>>>>      Chip quik
>>>>
>>>>      On May 19, 2016 4:54 PM, "MTG" <grant at musictechnologiesgroup.com
>>>>      <mailto:grant at musictechnologiesgroup.com>> wrote:
>>>>
>>>>          +1 on the scope, -1 on the USB camera.  And I have exactly the
>>>>          same situation regarding taking *my* scope to work and back.
>>>>          They actually have one at work but it has no light.  I use 10x
>>>>          most of the time on the microscope and rarely x30.  My scope
>>>> was
>>>>          not much over $100 USD and I've no complaints.
>>>>
>>>>          www.amscope.com <http://www.amscope.com>
>>>>
>>>>          GB
>>>>
>>>>          On 5/19/2016 4:35 PM, Gordonjcp wrote:
>>>>
>>>>
>>>>              Binocular microscope is great, cheapy USB camera
>>>>
>>>>          > microscope is perfectly okay (we use them at work
>>>>          > when I take *my* binocular microscope home), decent
>>>>          > non-magnetic tweezers and a good soldering iron with
>>>>
>>>>              not too small a point.
>>>>
>>>>
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