whit better word it in essence said same as me ...
not forgot that in SI all shop do it board on big machine
i find nice video today that show extreme slow motion of a GSM machine feeder in operation
very nice http://www.youtube.com/watch?v=275BCu9lQJQ
and machine in operation ..http://www.youtube.com/watch?v=6Ed0A7Sa8Os
i have room for this you may sure that it was part of the shop the one of the better money for the buck machine
available on used market ,mydata was good but to popular for short run so price keep bit high
not forgot that buy used machine was same process as new one , you ask to see it work first and that one whit supplied on site training , if seller not do that not touch it , and honestly if "BIG" machine made for 24/24 7/7 prod
have place 2-3 million part then still assemble perfect one of your board ,did you really think it will die just after this one ?
you said that you plant to use it very low usage ,so normally it will last you life time ,ok you will have some maintenance to
do but that true even on new machine ,and personally i see more issue on new machine that on used one (if you not buy boat anchor)
and last tip i may tell if you plant to do 0201 try buy machine that do 1005 that will keep mind in peace
like on my machine i use 0201 for all calibration ,and adjustment run ,then when yeil was good < 5% bad part ,miss pick , part missing etc etc .. i knot that will have 99.99% working on target 0402 and for make it will not pass the day to empty reel of part on testing ;-) my current test board have 1500 0201 on it so take <15 min to validate whole system healt
and keep in mind the extreme slow motion of the feeder ,you not knot now but it really amazing ... not vibration ,part cover
and perfect aligment under ~30 MS
ha and last ,never forgot that it i miss to pick a part and try to place the part , that start of big problem
since nozzle will touch past ,past make it sticky ,and reduce air flow end result was succession of more bad part
and more past on nozzel , that pain ... ( more part was small more it a issue) that was issue to any manufacturer
so i repeat it , feeder ,feeder ,feeder bad feeder design on the best machine = bad assembly ...
and ok aps gold feeder was not so bad for the kind of low end machine ,but it relfow was bad and it mechanical centering let me bit perplex as per it design ,you will Quily find that mechanical centering was a must and when work good it superior to vision on many aspect , honestly i almost never use vision ,but mydata have excellent mechanical centering system
it even use LCR METER for check part value and polarity ;-)
good luck and have fun ,and still cannot relive you not able to find a honest assembler and let you focus on your nice product .. ma-by time to open a us branch lol