Heller 1706EXL increased thermal cascade on last 3 zones

Hi. Aside from the good advice above, wish to throw in our experience with our 1809EXL. Had < 200 on-hours and the oven would not melt the assorted fresh paste we sourced from different suppliers. The s/w reported that the set temps were being met but the solder paste looked the same on exit as entry.

After some debugging, concluded the ANALOGIC controller to be defective. Factory claimed there are no public schematics as the job was outsourced to this silent / defunct engineering company. We did start to reverse engineer the PCBA but found some used modules on the market. Factory wanted $1400 USD in the USA. Same module is $700 out of Shenzhen (new). Found the used module @ $300 / $350 USD if my memory is correct - purchased 2 from the following vendor.

This vendor, to us is gold. So easy to work with and shipped us the modules (after payment of course) - risk-free. If it does not work - send it back for a refund (less shipping). Just checked their website and they have 2 of them at this time.

Consider to review how your unit is controlled. I recall that they use multiplexers to mux in / out the zone thermocouples / top / bottom, etc. If you indeed have this controller - consider to buy and swap out yours. Take a picture of the wiring of course before starting.

Hope this helps. Do post your updates here.

http://www.ibesmt.com/4-28983-2/PL10-28983/analogic-tdm-board/11713/SP.aspx

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