Electronics Forum | Thu Oct 02 17:55:16 EDT 2008 | davef
~le sigh~ makes a good point about forcing bent leads into the solder, letting the solder cool, and releasing the force on the lead. On the other hand, reforming leads of components prior to assembly is dangerous, also, because the "bending of a lead
Electronics Forum | Fri Oct 17 14:26:39 EDT 2008 | hegemon
We use Mirtec MV-7s for post SMT inspection of solder joints as well. The artistry is in the program debug. We are very pleased with the solder inspections provided by these machines, and technology having advanced bit, most every AOI machine has t
Electronics Forum | Thu Oct 16 11:15:53 EDT 2008 | davef
A good solder connection with heavy ground plane requires: * Plenty of heat [Is the preheater located too far from the wave? Whenever you look at board temperature, there is a sharp decrease in temperature between the preheater and the wave.] * Conta
Electronics Forum | Wed Nov 05 18:39:06 EST 2008 | joeherz
Hello, We have recently installed a selective soldering machine and are seeing some voiding/cratering in random locations. We have done some basic experimenting with fluxing parameters, preheat and dwell times but haven't been able to eliminate it.
Electronics Forum | Tue Nov 11 19:41:06 EST 2008 | gregoryyork
Thats the problem residual residue from HASL fluxes Lead free especially are worse.Very hygroscopic and out gass and produce dewetting as well over wave soldered boards especially. Leave iron on blown joint and will after several seconds fizz and pop
Electronics Forum | Fri Nov 07 23:40:41 EST 2008 | padawanlinuxero
I have been working on the SMT area for a while now, must of my experience is on programming and pick and place, now in my new job I have to control a complete SMT line and I have a little knowledge on working with solder paste but I like to read mor
Electronics Forum | Sun Nov 09 21:52:26 EST 2008 | phomann
Hi, I have acquired a Fisnar I&500 Solder Robot that has not come with the expected manuals and software. The machine is a 2001 vintage. CAn anyone help me with obtaining the operating/service manuals for the base unit. I have managed to get the m
Electronics Forum | Mon Jan 19 08:37:16 EST 2009 | lkpdsund
Hello all! We possess a speedline electrovert omniflo 7 reflow oven at my site. Last week we examined how the solder profile was affected by fan-speed and by providing the soldering process with compressed air(O2) or nitrogen(N2). We also ran the sa
Electronics Forum | Wed Mar 18 16:50:20 EDT 2009 | khowell
There are many users of SN100C in reflow. SN100C was originally introduced as a wave solder alloy which offered cost savings over SAC, no solder pot erosion, and high fluidity. Since it is eutectic, no plastic range, the joints have a smooth, shiny
Electronics Forum | Fri Apr 10 07:52:16 EDT 2009 | davef
On cure checking, we have this undated note from Jack Crawford at IPC * IPC-SM-840C "Qualification and Performance of Permanent Solder Mask" has several Test Methods for different types of solder resist material, but probably the only applicable one
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