Electronics Forum | Thu Jul 06 11:47:10 EDT 2017 | bobpan
Are you sure the board is clamping tightly. If it moves during a run this can happen. Before reseting the machine. Go and check your feeders. If they are off the same amount....then the machine truly has a drift in that axis...if the feeders are stil
Electronics Forum | Mon May 04 14:31:19 EDT 2009 | markgray
I am trying to figure out a strange problem on our machine. When I turn on the component verifier fuction the pick in the feeder offsets to the right 3-4mils. This is causing mispicks on 0805 and 0603 parts. When I turn off the verifier the pick is c
Electronics Forum | Tue May 05 07:38:52 EDT 2009 | markgray
I found that if the feeder correction is turned on the offset of the verifier is transfers to the feeder data for some reason. I turned the feeder correction off and the problem went away.
Electronics Forum | Mon May 04 21:31:55 EDT 2009 | dougt
I haven't worked on that machine in a while but here's a couple things to check. I'm pretty sure the verifier "feeders" have to be in the first feederslot on each side, make sure they are there. I think offsets for the verifier "feeder" are automat
Electronics Forum | Sun Dec 17 22:55:45 EST 2006 | foolat
I'd like to know how much capacitor offset from the pad should be acceptable? What are the risks of the placement offset if greater than the acceptable level? I'm still quite new to this so any help will be very much appreciated. Thanks
Electronics Forum | Sun Dec 17 23:51:51 EST 2006 | foolat
what about for cases of 0306 and 0204 chip capacitors? what is end overhang?
Electronics Forum | Sun Dec 17 23:53:08 EST 2006 | foolat
oh and i forgot, what's the risk/failures to the pcb board/unit if these specs are not followed?
Electronics Forum | Mon Dec 18 16:43:22 EST 2006 | darby
Boomerang, You said you are new to this so, First question. Are the components placed correctly with no offset pre-reflow? If the answer is yes then it's happening in the oven. Most likely cause is pcb design. If the answer is no then you have a pla
Electronics Forum | Sun Dec 17 23:22:17 EST 2006 | bigdaddysoy9
If you are talking about a chip capacitor, then I think it's 50% (of component width) side to side for class 1 and 2. And 25% for class 3. There is no end overhang permitted for all 3 classes.
Electronics Forum | Mon Dec 18 18:27:29 EST 2006 | bigdaddysoy9
This is end overhang: http://workmanship.nasa.gov/lib/insp/2%20books/links/sections/graphics/705/705-24.gif
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