Electronics Forum | Wed Jan 11 14:51:05 EST 2006 | j keller
we have a new ersa ews500 wave machine and are experiencing difficulty in profiling for lead free. particular issue is reaching 110c preheat for large TH electrolitic caps while maintaining 110-170c on 1/4 watt resistors in same area
Electronics Forum | Fri Jan 13 12:12:48 EST 2006 | jimk
we have 4 bottom IR heaters and a 2 zone bottom Quartz heater (2 lamps/4 lamps) and 1 convection heater above zone 1 IR. we have very tight restrictions from customer and I could send profile view to your email if possible
Electronics Forum | Wed Jan 11 16:56:15 EST 2006 | russ
So are you saying that you cannot reach 110C at 1 location without raising another location to excessive preheat temp? If so, sometimes slowing down the conveyor and dropping the preheat temps will help you get equal temps. I do not know this machi
Electronics Forum | Sun Apr 12 21:37:52 EDT 2009 | padawanlinuxero
HI !!! We have the same oven! and yes profiling is hard, but not that bad. Check with the solder paste company for information, right out of my head dont remember for the temps that we use on mondayIcan show you my profile so that youhave an idea
Electronics Forum | Tue Mar 31 11:05:26 EDT 2009 | ericthered
thanks for the responses. Went to Kester. Better now.
Electronics Forum | Fri Apr 03 15:42:23 EDT 2009 | rkevin
Hard to beleive anything from Kester these days would help. (Unsolicited opinion)
Electronics Forum | Fri Mar 27 10:04:51 EDT 2009 | ericthered
We have been having problems with proper wetting when running mainly lead free but also leaded solder in our Ersa Hotflow 3. Solder either often looks grainy or doesn't flow over the whole pad. This is generally the case when my profile is 170 firs
Electronics Forum | Fri Mar 27 12:44:07 EDT 2009 | stepheniii
Let me be the first to suggest; Get a better oven. 5 zones minimum. If you can't, you will have to have some way of profiling the board. Does the oven have thermocouple ports? If not you will have to buy some kind of termperature datalogger. Mayb
Electronics Forum | Mon Apr 13 12:32:55 EDT 2009 | ericthered
That would be great Armando, thanks. Also, what changes might I make with metal clad light boards (LED). heat transference is tricky with these and the solder is not wetting well.
Electronics Forum | Fri Mar 27 14:12:10 EDT 2009 | rgduval
Check with your paste manufacturer for a recommended baseling. The paste manufacturers generally have a database by oven that gives optimal performance for their paste. It's only a baseline, and does need to be adjusted based on the thermal foot pr
