Electronics Forum | Fri Jun 12 11:19:25 EDT 2009 | gregcr
we have a small heller 988 oven that has served us very well over the years. I see them cheap on the used market. Worth looking into in my opinion.
Electronics Forum | Sun Apr 05 12:30:22 EDT 2009 | qualityguy
Forum: Has anyone experience conformal coat peeling after HASS and the failure mechanism being low surface energy attributed to the solder mask?
Electronics Forum | Thu Apr 09 06:28:11 EDT 2009 | qualityguy
We have different Solder mask 'gloss' and 'satin' the gloss has a surface energy =40 dynes. The test evidence to date is strong correlation between surface energy, mask type, HASS failure
Electronics Forum | Thu Apr 09 18:55:49 EDT 2009 | gregoryyork
seen it many times before when the resist is not cured at manufacturing. get PCB man to check with K type thermal couple that boards ARE in fact cured. this is normally 155C ON board temperture not oven setting Cheers Greg
Electronics Forum | Thu Apr 09 21:21:11 EDT 2009 | qualityguy
Hello, another SME is saying the solder resist cure level is suspect. I have had a industry SME make reference to this too. Adjusting the cure of the resist changes the surface energy
Electronics Forum | Tue Apr 07 15:01:06 EDT 2009 | jascl
I have been purchasing from Manncorp for 15 years. We have purchased p&p machines, printers and ovens. You may email if you have any questions.
Electronics Forum | Wed Apr 08 13:16:56 EDT 2009 | rodrigo
There is a tactile sensor and the air hose and wires do not look like they've been kept up. Is this falling of the Z normal in order to prevent damage to the wires/air hose? Thanks
Electronics Forum | Wed Apr 08 13:21:40 EDT 2009 | cyber_wolf
No it is not normal. The reason it is happening is because the Z motor is in an over current situation. You need to fix the wires and get the connections out of the way.
Electronics Forum | Thu Apr 09 10:34:10 EDT 2009 | chrisgriffin
The Z axis is overloading. Could be a connector between the top of the table and the bottom of the rails, or a faulty motor, z-brake, or driver. Good luck!
Electronics Forum | Wed Apr 08 08:21:48 EDT 2009 | 1036
push the "bubling" and it springs back. It does not look like solder mask. We may have to fight with board house as they don't think it's their problem. Do you know any way to find the real reason? Any idea or help will be appreciated.
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