Which BGA REWORK machine?

[Tekno]

I have owned an achi 6000 and its horrible. uneven heating is what kills me the most so I have been thinking of upgrading.

I have a bit of money and was wondering what rework machines do you guys recommend I mostly do laptop motherboards so I dont really need ir pro sc size..something reliable and not so chinease...as chinease quality is the worst ever. I know everything is made in china now a days but I have been doing some research lately and came across this

THE BGA REWORK MACHINE or TBRM
http://www.ebay.com/itm/The-BGA-Rewo...item2339a57d5e

its claiming to be made in the united states with quality parts?

[dj_ricoh]

Re: Which BGA REWORK machine?

omg!
i have my eyes on one of this.
still holding some money to buy it.
http://www.ebay.co.uk/itm/1110063111...%3AMEBIDX%3AIT

its a bad idea?

[xboxhaxorz]

Re: Which BGA REWORK machine?

i would avoid achi, scotle and ly brands they suffer from quality issues as mentioned from above

[dj_ricoh]

Re: Which BGA REWORK machine?

but but but ... what then?
i will only have around 400-500GBP
aaaaand no air bga station

[xboxhaxorz]

Re: Which BGA REWORK machine?

IR is preferable over air

i will give you my take on getting a station, you can buy a cheap station which will definitely work but you may experience issues such as uneven heating, defective components etc; and end up having to upgrade parts which would end up costing more long term than if you initially bought a reliable unit

if you plan to do repairs for customers, i would recommend saving and then investing in the right station so that you can offer them a quality repair

when i started i went from an aoyue air station, to a aoyue 732, finally an achi ir pro sc, which i changed the heaters to german elstein and replaced the ssr with opto22 and then i ended with a zx360 rework station

if i had the information that i have now i would not have wasted $$$

[Th3_uN1Qu3]

Re: Which BGA REWORK machine?

IR is more flexible than hot air and will allow you to replace unusual/sensitive components with ease, such as display connectors or any kind of plastic slots. On the other hand, many former ACHI owners have complained about uneven heating and damaged BGAs as a result.

I would get a hot air machine like a Honton R390 instead of the ACHI. Then again, i still work wih a regular hot air station and preheater (and doing a damn good job at it) so take my advice with a grain of salt. That being said, i would not buy a station unless money came pouring out of the sky. Perhaps i've just gotten too used to this way of doing things.

[xboxhaxorz]

Re: Which BGA REWORK machine?

Oh how could i forget, yea IR allows you to remove sockets and connectors

But thats the point i was making with cheap machines, tons bought the ACHI and eventually IR got a bad name when in actuality its newer and better tech in reworking

Focused IR is even better but way way pricier

[dj_ricoh]

Re: Which BGA REWORK machine?

OMG!
do you saw the dimession of a new chip from the new sony vaio.
crap cheap mobo with a 30x30mm chip.

if i get a pre-heater with a hot air station they will come off.

will it take out the chip and not make it brown (popcorn)?
this one!
http://www.ebay.co.uk/itm/1110063111...%3AMEBIDX%3AIT

or this one?

http://www.ebay.co.uk/itm/ACHI-IR-PR...06311118&rt=nc

[Th3_uN1Qu3]

Re: Which BGA REWORK machine?

If you insist on getting an ACHI, the IR-PRO-SC is the better option.

[drdyzio]

Re: Which BGA REWORK machine?

6500 is really bad at preheating !

[Tekno]

Re: Which BGA REWORK machine?

ir pro sc stock as i have heard on numerous threads is as much of an bad option as the achi ir 6000 series is....only difference is the sc has a bigger preheating area.....but they all have cheap Chinese parts and unreliable heating elements.

any american bga rework machines besides the one i found that i posted?

[xboxhaxorz]

Re: Which BGA REWORK machine?

ir pro sc stock as i have heard on numerous threads is as much of an bad option as the achi ir 6000 series is....only difference is the sc has a bigger preheating area.....but they all have cheap Chinese parts and unreliable heating elements.

any american bga rework machines besides the one i found that i posted?

do you have a link to this american bga rework station company brand

[stj]

Re: Which BGA REWORK machine?

if you get an achi - check the pre-heater plate wiring.
a friend got one cheap because of uneven heating - some of the connections had come loose in transit.

it works really well when it's all connected.

one other thing,

remember this is industrial kit.
at full power - everything on, it can pull over 4kw - you WILL need an industrial grade outlet to connect it.
(unless you want your plug/socket eventually burning up!)

[dellxps15]

Re: Which BGA REWORK machine?

i have a full ir bga station and my home 3kw power is good even if i use it at max.

many people buy the achi and then after a bit change their plate with elstein brand.

ofcourse if your budget is about 600 gbp ill get that sc pro, or ir6500 and change plate with elstein.

every machin below 1800€ is cheap quality and in soem case practice will make the difference the unique is an example of good experience :p

[xboxhaxorz]

Re: Which BGA REWORK machine?

yes thats the route many go buy a cheap station and upgrade it later, but they can save quite a bit by going directly for the quality machine

basically changing the heaters, and ssr is almost replacing all the critical components

[Th3_uN1Qu3]

Re: Which BGA REWORK machine?

One thing i haven't yet figured out why they use expensive SSRs when a $1 triac does the job just fine...

[xboxhaxorz]

Re: Which BGA REWORK machine?

If that is the case, i can test my station with a triac

[stj]

Re: Which BGA REWORK machine?

ssr's are fully isolated between the input and the high-voltage side,
and they have integral zero-point switching.

[Th3_uN1Qu3]

Re: Which BGA REWORK machine?

ssr's are fully isolated between the input and the high-voltage side,
and they have integral zero-point switching.

Isolation and switching at zero-crossing of mains waveform? Use a zero-crossing optocoupler like the MOC3041 to isolate the triac from the control circuit. That's exactly what my preheater control board uses, along with a BT139-600 triac. Keep in mind that i've only got 800W of bottom heating, so extra/more powerful triacs may be needed for higher loads, but my triac doesn't even have a heatsink on it and it's been running fine for more than 1 year. I use it at least once a week.

Open up any vacuum cleaner with adjustable power control and you'll find exactly the same circuit. Most of the times there won't even be an optocoupler - they will be using pots with plastic shafts along with that big knob vacuum cleaners usually have, so there is no risk of electrocution while keeping the circuitry cost at a minimum.

I've taken apart several 2000W vacuum cleaners and they didn't have a heatsink on the triac either. They did put the board with the triac in the exhaust air path tho, but that doesn't really mean a lot because the air circulated by the motor is already hot, as it passes thru the motor first. Also, an AC motor is a much more difficult load than a plain resistor... So if it works for controlling a 2kW motor, it will be more than fine for controlling a heating element.

[stj]

Re: Which BGA REWORK machine?

well your describing an ssr pretty well.

they are optoisolated and using zero-crossing with a snubber-network on the output so the triac wont latch or burn on inductive loads.

people use them because it's modular and easier than designing a discrete circuit.

that and they come BIG - i had a load of 100a ones a while back used for DMX stage-lighting.