Electronics Forum | Mon Jul 19 19:39:06 EDT 2004 | KEN
I once had a forced convection oven (insert brand here)...and the top 220VAC heater (reflow zone) had shorted to the frame ground, blowing the branch line fuses. THe machine had no idea the heater was out because the lower heater was heating the upp
Electronics Forum | Mon Aug 16 04:55:30 EDT 2004 | roel
Concerning the solder-balls, there are a few causes for this. Try to slow down your solder-speed (P.e 80cm/min). Can you measure temperature after the pre-heat zone? Are there also blow-holes in the joints? Personally I think there is some water in t
Electronics Forum | Thu Feb 17 15:54:18 EST 2005 | Slow Ride
Actually the opposite will happen. A thinner board will heat up faster than a thicker board. That aside, it sounds like you don't have any thermal profiling equipment, do you? This is probably a very good investment if you don't. Take all/most of
Electronics Forum | Wed Jun 29 17:56:47 EDT 2005 | Ryan
We have a new Heller 1809 EXL reflow oven and when we run MELF�s or Aluminum Electrolytic Capacitors through the oven they are being blown off the pads. I have verified that the placement is good before reflow. I verified that they are pushed down
Electronics Forum | Thu Jul 14 01:08:30 EDT 2005 | pyramus
I too experience it too component being blown out of the pad also using heller 1800. In my case I also did check entry and exit of reflow so far no obtruction. Also checked profile setting also ok. Mine is a 0603 Chip capacitor... but problem is o
Electronics Forum | Tue Jul 05 16:29:27 EDT 2005 | stepheniii
The air kiss is to replace the vacuum with air so the part will drop off the nozzle. Every machine I've seen with Air kiss, uses it when discarding a part as well as when placing a part. The air kiss should not be strong enough to blow the nozzle off
Electronics Forum | Tue Jul 19 12:29:20 EDT 2005 | cyber_wolf
How does the mount plane change if the surface of the board is located in the same place every time ? For example: If you put 2 boards side by side on the Y wagon : one board measures .020" and the other .200" the surfaces of the boards are going
Electronics Forum | Wed Sep 21 20:03:34 EDT 2005 | kevinbooth
I am going to agree with Rob a little. It is also possible that a internal ground plane might be under or connected to the pads of this cap thus causing a increase in temp to this part during reflow. This can cause parts on occasion to jump from the
Electronics Forum | Mon Oct 03 21:15:16 EDT 2005 | adlsmt
Its a single board, one up. 4 layer, pretty simple, no large copper pours. We get these consigned from our customer so I cant work that end of it but wanted to make sure to cover everything I can. The oven it runs in was just checked out by the facto
Electronics Forum | Thu Dec 08 11:50:40 EST 2005 | Stefan
If you mention mis-alignment and missing component in the same sentance, I suspect the component is not properly released after placement. Assuming the Juki machines use an air blow, after vacuum shut off, than I would look at a correct air flow firs
