manual BGA rework station

[dpenev]

Hello,

Can someone suggest good Chinese SMT rework station in the $1000 - $2000 range.

Any comments about  Zhuomao ZM R5830?
http://seamarkzm.eu/index.php/en/produkty-3/93-soldering-station-bga-zm-r5830

Thanks
Dimitar

[dpenev]

Thank you blueskull, Yes using inexpensive bottom preheat plate and manual Hot air gun is what I am using now. Now we got project with very big bga 40 x 40 mm expensive on top of that. Our current equipment doesn't have enough temperature power for chips like this so I was thinking to get something more power full and advanced. I think having temperature feedback and time temperature profile is also kind of a good thing.
Anyone using suitable equipment in $1000 $1500 range or less which can recommend?

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[dpenev]

I was thinking, probably it will be smarter to spend the money for good bottom plate, powerfull and having different temperature zones. Any thoughts in this direction?

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[AndyC_772]

If the limitation you're looking to overcome is a lack of heat for large devices, and the inability to regulate and profile temperature, then why are you looking at changing the bottom plate you have?

For a large, costly BGA, the problems I'd personally be looking to solve would be alignment, profiling, and heat capacity, in that order.

It's notoriously difficult to accurately measure the temperature of a hot surface with a thermocouple, due to the poor thermal contact between the thermocouple tip (round) and surface (flat). Do you have access to a thermal camera which you could use to see how hot your device is getting?

How do you place your component accurately on the board without risk of smearing solder paste between pads? A good BGA rework station includes an optical system to help align the pads exactly with the PCB footprint. Is that something you might need, or do you have a very steady hand and/or only use coarse pitch devices?

I use a JBC TE-2A hot air station, which includes the capability to set a reflow profile. You can fit the handpiece into a stand (though JBC don't make one, oddly), then program the base unit to adjust the heat over time. If you already have a hot plate and board holder, maybe something like this would be a good substitute for an integrated rework station?

[mairo]

... You can fit the handpiece into a stand (though JBC don't make one, oddly) ...

Do you mean something like this:
http://www.jbctools.com/rework-arm-category-19-menu-2.html

[mairo]

Mitko, how about a second hand unit of eBay:
https://www.ebay.com/itm/Metcal-3502-bga-csp-rework-station-hot-air-reflow-machine-solder-soldering/282821510881?hash=item41d979c6e1:g:J5EAAOSwcSxaaOSW

This Metcal has optical alignment, you will have to make sure to have the right size nozzle for your large BGA and also maybe confirm with the bottom preheater - I have similar/same machine, but my bottom preheater is larger I think (I think this is because this model for sale is the CSP version, predominantly made for smaller packages and smaller boards). The item location is also probably close to you for even maybe pickup.

Of course you will have to make sure the item is working and also ask for a lower price (altho it still will be over your budget)..

[AndyC_772]

Do you mean something like this:
http://www.jbctools.com/rework-arm-category-19-menu-2.html

Yes, something like that! 

[dpenev]

Hi Guys,

Thank you for the suggestions.
Well ebay Metcal item seems to be more expansive relative to what I am willing to spend right now.

AndyC_772 the BGAs I am dealing with are typicality with 0.8mm pitch so alignment is not the biggest issue. 
Yes I am after more repeatable and consistent result and I believe controlling uniform temperature better
is the key.

Anyone having experience with Aoyue 883 preheater?

Thanks
Dimitar