Electronics > Beginners
Potentially a stupid question but...
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james_s:
I wouldn't expect there to be a large startup draw, the load will primarily be heating elements which are just big resistors in effect. The issue you are likely to encounter is that if the machines you find are all 240V it may be because they draw more than the 1800W you can pull from a standard 15A 120V receptacle.

Do you have an electric clothes dryer? Those will be 240V and you can make an adapter to plug into the dryer socket, that's what I do when I need to weld something at home.
sbmotoracer:
@ t1d - Thank you :-)

I figured that different markets may have a unit or two that don't list on the .ca site but Im honestly shocked at how many are on there that will only ship to the US/Europe but will refuse to ship across the border. I've delt with some of those reshippers you mentioned before and it might be cheaper to rent a car and drive to the seller then use them.... ( last time I tried to order a $5 bag of candy from the states they wanted $50-$100 USD to reship depended on the speed of the delivery. I can only imagine how much a bga machine would cost lol.

@ james_s - I figured as much in terms of the power draw but in your opinion would a console board require that large of strength a heating element? I'd prefer a 110Vac machine but if a 220 is required for them then so be it. As for the dryer, I'm not sure. I'll have to check when I get home from work tonight.
james_s:
I really have no idea, I've never used a machine of that type. The hot plate and hot air station I use for SMD work don't use a particularly large amount of power though.
rhb:
I have a hair dryer that claims to pull 1750 watts.  No idea if it really does.  It was cheap is the reason I have it.

There is no reason that *any* SMD rework system would use a lot of power.  There's not enough thermal mass to heat up.  A large reflow oven would, but that's a whole other world.

The only instance a rework station would use a lot of power is coming up to temperature.

My Weller 750 heat gun says it uses 1680 watts.  That I believe.  I used it recently to desolder a bunch of crystals in metal cans.  It was quick.  But I had to be careful about how I pointed it to avoid collateral damage.  I didn't time how long it took, but 10-20 seconds was probably all it took after it had warmed up.  I waited until it had warmed up before desoldering the cans because the vise holding the xtal was 2 ft from my test gear. And I did not want to melt the plastic knobs.

If I do that sort of thing more I'll build a metal shield.

You should have no trouble handling a large board if you modify an electric griddle for good temperature control and make an insulated cover for it.

FWIW I'm setting up to teach myself to do SMD rework.  I bought an Aoyue 2703A, but initial trials showed I really need to bring the entire board up to 100 C.  I'd been wondering what to do with a slew of ancient PCs and now I know.  I'm going to practice removing and reinstalling chips, testing each time if the PC still works afterwards.
cdev:
The hair dryer likely pushes a lot of air faster. If the air was slower it would be way too hot to use on hair but hot enough for desoldering or stripping paint. Precisely adjustable temp and nozzle size makes it well suited for rework.

You're right about preheating, its much more predictable and pleasurable if the board is already half of the way there.


--- Quote from: rhb on January 10, 2019, 01:59:11 am ---I have a hair dryer that claims to pull 1750 watts.  No idea if it really does.  It was cheap is the reason I have it...


--- End quote ---
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