Electronics Forum | Wed Sep 08 21:32:46 EDT 1999 | Jason Nipper
| | | | | | Hello: | | | | | | We are using a Heller 1500S reflow oven to solder surface mount parts. Just within the last two weeks, the larger I.C.'s are moving while going through the oven. The parts are checked for placement before putting
Electronics Forum | Tue Mar 19 11:54:08 EST 2002 | davef
FORMULA OTHER THAN LxBxZ? - Paste is X% [X=~50] metal by volume. Your paste supplier knows the value of 'X'. HOW TO ACHIEVE A CONSTANT REFLOW PROCESS CAPABILITY? - Buy a capable oven, operate and calibrate it properly.
Electronics Forum | Tue May 16 15:16:26 EDT 2006 | Chunks
Not knowing your brand of Heller, I might suggest disconnecting the first cooling section to verify it's your heater fans. I just had a retro kit done to my Electrovert for a similar thing.
Electronics Forum | Tue May 16 18:03:41 EDT 2006 | russ
A heller that the fans work on? Wow, you should be feeling lucky! If you are sure it the fans you should slow 'em down a bit. Russ
Electronics Forum | Wed May 17 10:55:59 EDT 2006 | james
We do not have a fan controller. For some reason our engineer forgot to get that added in the options. We have an 1809EXL model with not fan controller. Heller wants to charge us for that option.
Electronics Forum | Wed May 17 12:20:37 EDT 2006 | russ
I would think that you could just add a pot or something to adjust current to fans for pretty cheap Russ P.S. sorry about the fan joke!, had a "good experience" with them once.
Electronics Forum | Mon Jan 04 18:56:25 EST 1999 | Marc P.
| We have a Vitronics SMR400N oven and many times need to use N2 inerting. My problem is that it takes close to an hour of operation to purge the system to achieve the desired O2 levels (~40PPM). This is not only time consuming but results in an inor
Electronics Forum | Mon May 24 03:11:05 EDT 2004 | snmsmt
Hi everyone, I'm new to this Forum and still a young'n the electronics manufacturing industry so be gently on me :p I'm currently trialing different solder pastes with our small 5 stage oven and I am having wetting issues with a particular paste. C
Electronics Forum | Tue Mar 04 08:15:37 EST 2008 | jola
Our profile tempatures in the owen is: Preheat 6 zoones 135,155,165,175,185,195. Peak 3 zoones 255,245,240. We do check our profiles with test probs and a "Surveier" temrature recorder every 3 month and we are within the paste supplyer recommendation
Electronics Forum | Wed Mar 12 11:41:41 EDT 2008 | gregoryyork
Blimey just seen the picture that is bad. You could try to dissolve some of the residue/gunge in IPA if it is flux residue it should readily dissolve if it is resist issue then only portions will dissolve leaving a white powder which is Talc If you
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