Electronics Forum | Mon Feb 03 16:30:47 EST 2020 | dontfeedphils
Reason I ask is because I've never really paid much attention to the cooling rate, but I'm currently running a 10 zone oven and using all 10 zones for heating whereas I've almost always used a 10 zone as 9 heating and the last as a cooling. I'm curr
Electronics Forum | Tue Feb 01 10:25:24 EST 2005 | Scott Baker
Jay - I read your report and was interested to see that you ran your evaluation on a Heller 1500 5 zone. We have been hearing for some time that a larger machine (7 zone min)with higher temp heaters and fan motors would be required. Is yours a "hi t
Electronics Forum | Thu Jan 07 10:19:43 EST 2016 | dyoungquist
In 2014 we paid about $40K USD for a new Heller 1707 MKIII (no nitrogen) which is a 7 zone oven. One does not need a 8-10 zone oven unless you are doing high volume. We use the 1707 for everything including lead or lead-free solder, 0.031" to 0.093
Electronics Forum | Fri Feb 18 11:30:27 EST 2005 | austinj
Thanx aj and Russ. I will verify my ramp up/down degC/sec and the soak zone peak temp. Fluxes could be burning off prior to activation. I have found access to an old thermal data logger to help verify the Heller thermocouples. I will post updated fi
Electronics Forum | Mon Feb 12 20:15:20 EST 2007 | kjp
Do I need a 10-12 zone oven for processing Lead free or could I use a oven such as Heller 1700W
Electronics Forum | Fri Jul 26 07:59:48 EDT 2019 | robl
I'd probably go Heller from previous experience, we had 11 at the last place and they were pretty bombproof and the UK support (Steve) is good. Avoid cheaper ovens with small zones and reduced heated lengths as that will restrict what you can do reg
Electronics Forum | Fri Jul 01 11:03:11 EDT 2005 | smt_pro
We had this happen in a Heller 1808 oven when we placed Tant-A caps in glue (bottom side / no paste). We had our oven retrofitted to control the zone blower speeds. No more problem.
Electronics Forum | Tue Sep 28 11:58:09 EDT 2021 | stephendo
Do you mean reflow profiles are showing 20F above set points or is the oven display is showing 20F above set points?
Electronics Forum | Mon Jan 30 22:45:30 EST 2017 | cmarasigan
Hello Marc, Thank you for the recommendation. I've contacted our local service support. We found out that heat coming from higher zones 7, 8 & 9 overflows to zone 3, 4 & 5 which affects actual temp reading at Z3,4,5. Since we already replaced some b
Electronics Forum | Fri Sep 07 09:13:21 EDT 2007 | smtirl
Folks, we've recently upgraded to Heller MKIII reflow ovens with Gen 9 cooling units. We're running N2 atmosphere at 1000ppm O2 and Kester256 solder paste. We're seeing a big problem with flux residues building up in the cooling section of the
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