| | | | | | | | | | | Hiya, | | | | | | | | | | | | | | | | | | | | | | Could anyone please suggest recommended manufacturers of | | | | | | | | | | | IR rework stations for the removal of various SMT comps. | | | | | | | | | | | | | | | | | | | | | | Cheers | | | | | | | | | | | | | | | | | | | | | Why IR ? Ok, I�ve seen only one but that thing burnt the PCB before the solder was melting and costs a lot of money without any possibility to adjust and repeat profiles for your various needs, just timecontrol. | | | | | | | | | | Did I miss some new improvements of this sector | | | | | | | | | | Wolfgang | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | No Wolfgang, you missed nothing, but for convection IR. I too go with hot air as the most effective (currently) repair methods and processes. Love that hot air stuff, not that board burning IR. | | | | | | | | | | | | | | | | | | MoonMan | | | | | | | | | | | | | | | | | I add my opinion to MoonMan's, hot air is the way to go. We have 3 big systems for BGA rework, 2 from AirVac, 1 from OK Industries. For most other SMT rework needs we use simple hot air systems. We have over a dozen of these smaller units on the floor, mostly Pace Thermo-Flo systems. | | | | | | | | | | | | | | | | Jeff Ferry | | | | | | | | | | | | | | | Hey Jerry, | | | | | | | | | | | | | | You ought to see my latest invention. Actually, it's mostly big Dave F's idea. Maybe he'll post some pictures I sent him when I finished working on it. Boy, is it hot air. | | | | | | | | | | | | | | MoonMan | | | | | | | | | | | | | MoonMan, or is Mr. MoonMan more appropriate? We're always looking for new rework techniques and tools. Send them along, as chairman of the IPC Repairability Committee I'll also submit them for inclusion in the repair and rework guides if you like. Use my e-mail account if you prefer. jferry@circuitnet.com. | | | | | | | | | | | | Thanks | | | | | | | | | | | | Jeff Ferry | | | | | | | | | | | Mr. or sir - not terms I'm with which I'm too familiar. MoonMan works well according to my fine feathered following, but thanks. | | | | | | | | | | Yes Jeff, I will complete crude preliminary work on MY invention soon and won't share anything with Dave if he doesn't come up with the pictures soon. It is very basic but I have big plans for it, maybe even having someone invest in the idea so I can retrieve my so far invested 89 dollars (American of course). | | | | | | | | | | Thanks, | | | | | | | | | | Earl Moon | | | | | | | | | | | | | Hey Everyone, | | | | | | | | To satisfy all your curiosities to why I was enquiring about IR reworks systems as opposed to hot air is mainly due to the fact that our boards have not been designed with DFM in mind , therefore also ignoring rework needs. Due to close proximities of adjacent components previous trialed hot air systems with various nozzles types were heating up neighbouring chip comps. and moving them out of position. To answer the question of which category this type of system falls into would unfortunately have to be between 'yappers' & 'dogs' with systems such as 'Pace' and 'Ersa' already been trialed. | | | | Any further suggestions or recommendations would be appreciated. | | | | Cheers, Jack | | | | | | | Alright, for the airflow systems I try to get as low airspeed as possible and despite the fact that I can�t prevent neighboring parts to be reflowed again they stay in place. i think the same would happen with IR. | | | It�s just a matter of adjustment and profiling with equipment where airflow can be adjusted. | | | I do work with a German brand and don�t know if it�s available overseas but there might be systems with the same feature on the market. | | | | | | Greetings, Wolfgang | | | | | | | | | Is there any other recommendatons on particular hot air systems with air speed control? Wolfgang, What is the German brand that you use? | | | | Thanks, Jack | | | | | Hi Jack, | I use Finetech equipment (http://www.finetech.de/)and know about Martin but don�t know if they have a page or are sold overseas. | | Wolfgang | I think I missed something here. Concerning adjacent parts, They need to be at least .200" away from the part to be reworked. If that clearance is not available, parts must be removed so the nozzle will fit flush to the board. Once done, most hot air nozzles vent air up and away from adjacent parts so no reflow is imparted.
Earl Moon
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