Electronics Forum | Tue Jul 30 04:01:14 EDT 2019 | SMTA-David
Thanks all for your replies. I ended up getting an older second hand machine (2003 Heller 1707 EXL) from a local company upgrading their assembly line. It is in mint conditions and was used in air conditioned room and had maintenance every 3 months.
Electronics Forum | Tue Aug 13 09:41:03 EDT 2013 | horchak
If it's forced air convection I'd check all the circulating fans and filters. Also if its a clam shell bonnet make sure it's closed all the way and the seal is good. You didn't specify whether it is one zone or the full length of the oven, I do not w
Electronics Forum | Tue Aug 13 10:22:13 EDT 2013 | mccabekev
We are seeing this the full length of the oven. We run a lot of double sided boards, so we cannot run them on the wire mesh. I checked inside the oven to ensure there was no build up of dropped parts that could block it. The temperature difference
Electronics Forum | Tue Aug 13 11:20:41 EDT 2013 | horchak
Is this a new issue? You could run a wide piece of masking or duct tape along the oven seal on the outside just to see what happens. What is the heating plate configuration. Are they solid from front to back or split. My thought here is if there is a
Electronics Forum | Tue Aug 13 10:09:10 EDT 2013 | dyoungquist
We have a Heller 1707EXL that we use for lead and lead-free production. It has both a mesh belt and edge rails. We run 90% of our assemblies on the mesh belt (leaving the edge rails wide open). I have noticed when profiling a board on the mesh bel
Electronics Forum | Wed Aug 14 13:39:59 EDT 2013 | eadthem
Most of this you have probably covered, but these are what have caused heating issues for us in our 1707 EXL. First, you would probably notice, but check that all blowers are turning by looking at there cooling fans in the top and bottom, Our 170
Electronics Forum | Wed Aug 14 18:19:09 EDT 2013 | jlawson
Generally the heller exl range has issues in cross profile, some machines more than others. I have see as bad as 15 deg c and as low as 5 deg c ranging from entire length to a few zones. They never match the specification in reality. The markiii is
Electronics Forum | Mon Sep 14 21:31:33 EDT 2020 | dwl
Does the flickering go away once the oven reaches its set temperature? It will draw a lot more current while its warming up then when its running. Are your lights running on one leg of the same 415 VAC circuit? Reflow ovens are mostly resistive loa
Electronics Forum | Wed Jul 22 23:14:40 EDT 2020 | spoiltforchoice
Is that not an option you have to buy when you spec the Oven?
Electronics Forum | Tue Jul 28 13:40:08 EDT 2020 | dwl
It won't hurt anything in the oven.
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