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reflo oven settings

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Listen.I posted this same message on a diffrent thread but g... - Mar 15, 2006 by

AGREED ! ... - Mar 16, 2006 by Sr.Tech  

Wave Master Larry

#40448

reflo oven settings | 15 March, 2006

Listen.I posted this same message on a diffrent thread but got no repsonse. Here's what im wondering

Im more of a wave guy but we had a good employee in the engineering department, he's left the company but he used these setpoints on the ovens in ai. 180, 170, 170, 190, 200, 225, 225 I heard they worke pretty well at those deltas.I overhear some guys in the engineering department here at my place of employemnt talking about profiling and straight ramp and convection preheating and flux activation but not so sure about these things.these theeries sound suspisous.what does everyone here think of those setpnts.

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#40449

reflo oven settings | 15 March, 2006

I think you need to go back under your bridge.

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#40451

reflo oven settings | 15 March, 2006

Personally, I like the settings of 230,230,230,230,230 at a belt speed of 8 inches a minute on My Heller 1500. It cooks a pizza just fine. Jay

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RDR

#40452

reflo oven settings | 15 March, 2006

Set points are unique to each individual oven. You cannot tell anything with the setpoints at the zones. your profile is a soak profile most likely.

Suspicious ..... Absolutely! Flux activation is not important and neither is the temp of the board or solder joints! Just add some dross to the cooling zone and everything will be fine! Hopefully most of you in this forum will understand this little blurb.

Larry buy yourself some books and study up!

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KEN

#40461

reflo oven settings | 15 March, 2006

Listen. I agree these "theeries" are suspicious and a complete waste of time. You should resist all attempts at change and do what feels right to you. Remember, when other scoff at you, ignore them. Just continue doing it your way. Your prowess and critical thought processes in Manufacuring have gotten you this far. Right? So how could you be wrong? No way those brain-e-acks are going to out smart you. You da' man.

Trust me.

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#40467

reflo oven settings | 16 March, 2006

Larry, I have said this on the forum before.

THE ONLY WAY TO KNOW IF OVEN HEATER SET POINTS ARE CORRECT IS TO ATTACH THERMO COUPLES TO YOUR PC BOARDS AND RUN A THERMAL PROFILE WITH A DATA-LOGGING DEVICE!

Anything other than that is nothing but a guess.

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Wave Master Larry

#40468

reflo oven settings | 16 March, 2006

LISTEN.this previous employee swore by these setponts but had no kicprofile to back it up.I beleived him because he knew what he was doing but his boss in the eingineering dept always second guessed him.

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#40473

reflo oven settings | 16 March, 2006

"Your prowess and critical thought processes in Manufacuring have gotten you this far."

Awwwww, man. My first coffee/monitor spew of the week. Thanks, Ken.

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Bob R.

#40474

reflo oven settings | 16 March, 2006

If he didn't have a measured profile to back it up then his boss was right to second guess him.

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#40476

reflo oven settings | 16 March, 2006

Larry...LISTEN ! :

From my experience you are asking for trouble by thinkin what ur thinkin.

The scary part is that you probably supply plasma arc accumulator boards for NASA.

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Loco

#40478

reflo oven settings | 16 March, 2006

12 years of experience cant be wrong? Lets all forget all this profiling stuff, from now on we should all use them gel-locks in our waves and use the good old potato in the solderpot trick. Kickass PCBs guaranteed!

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#40479

reflo oven settings | 16 March, 2006

Larry,

You need to change your name from "Wave Master Larry" To just "Master Larry" since you know all.

Jerry

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Rob

#40481

reflo oven settings | 16 March, 2006

Hi Jay,

I'm guessing that you have either:

a) heated length of 64 inches b) a zone temp of 230C and not a surface temp of this magnitude c) Burnt pizza's

8 mins at 220C for a perfect non frozen pizza, however I find that the thermocouples keep falling off unless you weight them down with pastrami.

Also the slight after taste of flux residue is not totally welcome.

Pizza Master Rob, 3rd Dan.

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#40485

reflo oven settings | 16 March, 2006

> Larry, I have said this on the forum > before. > > THE ONLY WAY TO KNOW IF OVEN HEATER > SET POINTS ARE CORRECT IS TO ATTACH THERMO > COUPLES TO YOUR PC BOARDS AND RUN A THERMAL > PROFILE WITH A DATA-LOGGING DEVICE! > > Anything > other than that is nothing but a guess.

In this case I would add; print out the spec sheet for the paste you are using. And make sure you understand it then profile the board.

I think it's safe to say that there has been at least 10's of millions of dollars of hard core research that has been done on the subject of reflow. And 10's of thousands of years of reflow experience accumulated. I think that outweighs your friends experience.

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#40486

reflo oven settings | 16 March, 2006

AGREED !

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#40492

reflo oven settings | 16 March, 2006

My how this forum has changed. This is the kind of abuse I expected back when I posted my Hydrogen as a Nitrogen replacement idea: http://www.smtnet.com//forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=7207&#Message28823 Instead, all I got was a bunch of intelligent people giving me sound advice. I knew there were some engineers out there with a sense of humor.

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RDR

#40493

reflo oven settings | 16 March, 2006

No kidding! You need to post that again while we are all in the mood! That way we can see what Larry has to offer.

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#40494

reflo oven settings | 16 March, 2006

Don't keep us in suspense. Did you make the change? Was it all that management expected and more? If you did switch it properly I"m sure you could also use it as a heat source and not need to power the heaters. Another advantage could be during low humidity times of the year, it could help increase humidity levels.

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#40509

reflo oven settings | 17 March, 2006

Larry - What model oven do you have? We keep a library of settings on file that will help get you in the ball park. I agree that the BEST process is to use thermocouples to get actual board readings for really dialing in a profile. The numbers you have on the thread are for a profile that incoporates a soak rather than a 'ramp' profile.

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#40511

reflo oven settings | 17 March, 2006

I think people honestly thought you were the victim of misguided/bone-headed management.

I think Larry is just a troll.

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Cal Kolokoy

#40514

reflo oven settings | 19 March, 2006

Larry,

180 Deg. C (?) to start the profile seems a tad on the high side for a 7-zone oven. You risk too high of a ramp rate and solder beading. At 7 zones, there's no reason to get too hot that fast.

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