Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Misprint PCB Cleaning

Pete

#7540

Misprint PCB Cleaning | 2 August, 2001

Hi, How do you clean a PCB from Adhesive / Glue? I understand that if pcb's aren't properly cleaned they will give us open connection specially on PTH Components.

Thanks and regards,

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#7544

Misprint PCB Cleaning | 2 August, 2001

Hi Pete,

The only system that I have had any success with is Smart Sonic. There's tons of information on their website.

www.smartsonic.com

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#7547

Misprint PCB Cleaning | 2 August, 2001

With what machines have you had problems? And what specically were the problems?

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Rob Fischer

#17091

Misprint PCB Cleaning | 3 August, 2001

Good question Dave. Kerry has participated quite a bit in this sort of forum but I have yet to hear whether he is a user or a critic. Check out the Apex exhibitors manual to see all of the vendors that are available or the archives on SMTnet. You'll see Kerry's name thoughout.

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Ralph Wagner

#17096

Misprint PCB Cleaning | 4 August, 2001

Q. Mr. Kerry, who did you vote for, Gore or Bush? A. SmartSonic

Q. Mr. Kerry, what is your favorite color? A. SmartSonic

Q. Mr. Kerry, do you believe in Creationism or Darwinism? A. SmartSonic

Q. Mr. Kerry, IBM or Mac? A. SmartSonic

Q. Mr. Kerry, Tory or Labour? A. SmartSonic

Q. Mr. Kerry, what time is it? A. SmartSonic

Get the picture???

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Hussman

#17108

Misprint PCB Cleaning | 6 August, 2001

Hi Pete,

Wow, I figured you'd have tons of answers to this one. Anyway, call the vendor of the adhesive you are using and see if they have a cleaner for their adhesive. Most do now. Just make sure the SMT pads and vias do not have any adhesive on or in them or they will not solder(after the adhesive has been cured). You could use a machine to clean the misprints, but I'd make sure someone takes a close look at it afterwards. You can try alcohol wipes, but alcohol tends to harden most adhesives.

Good luck!

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Sean D

#17110

Misprint PCB Cleaning | 6 August, 2001

Hello All,

The audacity to yell Smartsonic here is appauling. This is a process approach dependent on the type of epoxy. To suggest your equipment without knowing a thing about the process is shameless. OK, now I'll get off my soap box.

The low tech way, sure proceed with alcohol wipes if your epoxy dictates the chemistry's effectiveness. You are more subject to operator issues but we all know those concerns. It's a balancing act.

Ultrasonic cleaning is likely to be your better approach. You should test chemistries before just throwing a cleaner into your facility. I'll be honest, I represent PMR Systems, but the process comes first, not the cleaner. Let your epoxy dictate your process, not the irresponsible statements of an overzealous sales person. And don't let them corner you into a single chemistry by leveraging it into your warranty package.

Good Luck, Sean

PS. If your interested you can find more data on our systems at http://www.pmrsystems.com

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mugen

#17115

Misprint PCB Cleaning | 7 August, 2001

When I was reading the smartsonic fantasy, I ended hospitalized for infectious laughs, and side split'in stitches.....

Now that cold reality has eased my pain, I must with calm headed purpose, mark my agreement to the Mr.Sean, that salespersons can be wee bit lite'headed, from excessive helium exposure, during their coffee breaks, and propose some rather miraculeous remedy, for common daily problems, issues that can be rectified with, non-complex solutions, if we only had the luxury of "knowing abt it earlier"....

Example, I had a sales Executive, promote their new lead (Pb) free solder bar, when we reviewed the technical specs, we found some ??additive?? labeled "X", and upon inquiry was informed "X" element, of the solder bar alloy composition, was company confidential info.... thats ok wif us, until we further found the "eutectic point", (of the 63/37 equal 183 deg-C melting point), was found to be 200~210 deg-C?????

How the hell do u get a melting point RANGE? melting points of any alloy is a fixed figure, eg water boiling point is 100 deg-C eg copper melting point is 320 deg-C eg 63/37 solder melting point is 183 deg-C

get the drift??? so dun let some sales executive, pull the wool over ye eyes, and mussy-up ye brain, with crap and bull.....

Good Luck :P

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mugen

#17116

Misprint PCB Cleaning | 7 August, 2001

Wagner,

u brighten my day :)

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Hussman

#17170

Misprint PCB Cleaning | 10 August, 2001

Sean,

Lighten up - I never mentioned a brand name in my responce! I may be appauling and I may be shameless, but at least I try to help and don't jump all over others.

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Sean D

#17182

Misprint PCB Cleaning | 13 August, 2001

Hello Hussman,

Sorry about the misplacement of my strand on yours. I was just posting to the very end of the conversation at the time. My statements were not aimed at you or at sales in general. Just trying to show that not all of us in sales are bad and that in this forum especially, the process should come first. My comments are specifically targeted to those citing brands as solutions before listening to the customer's process criteria. We're all in business to make money, I just think we should keep our dignity as well.

Cordially, Sean

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