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benaknoun
Spain
133 Posts |
 Posted - 07/12/2013 : 07:25:27
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Hi everyone
I have some questions please regarding desoldering with hot air.
I want to determine the correct temperature, air pressure, and nozzle size on my Aoyue 6031 hot air station.
On desoldering TSOP56 flash memory and SOIC8 eeprom.
When i set my hot air temperature to 340 degrees, air pressure to 060, with a round nozzle of 3mm, it takes 5 minutes to desolder a SOIC8.
With the same setting s as above, but with a 4mm round nozzle, it takes 1 minute to desolder a SOIC8.
So my question is, which setting is better?
With 4mm nozzle i am worried it is too big.
And with 3mm i am worried 5 minutes is too long.
Is 340 degrees enough or should i set it higher?
I also want to know the correct settings for a TSOP56
Any help would be much appreciated.
Thanks |
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| Reply #1
ZLM
2945 Posts |
Posted - 07/12/2013 : 09:50:20
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The temperature selecting is based on your solder type.
But 350 C works for most of solder types.
Increase the temperture to 400 C and see if it works. The part should be removed in about 1-2 minutes. |
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| Reply #2
benaknoun
Spain
133 Posts |
Posted - 07/12/2013 : 13:09:34
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quote:
Originally posted by ZLM
The temperature selecting is based on your solder type.
But 350 C works for most of solder types.
Increse the temperture to 400 C and see if it works. The part should be removed in about 1-2 minutes.
That's great, thanks for the info.
I will increase the temperature and see what happens.
So the maximum desoldering time should be no more than 2 minutes?
Is that also for the TSOP56 ?
And what about the nozzle size, is 3mm better than 4mm?
With the 4mm it desolders quicker cause the hot air comes out more.. |
Edited by - benaknoun on 07/12/2013 13:10:45 |
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| Reply #3
ZLM
2945 Posts |
Posted - 07/12/2013 : 16:44:38
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2-3 minutes with 400 C should not damage the chip.
You can use 4mm if you prefer. |
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| Reply #4
benaknoun
Spain
133 Posts |
Posted - 07/13/2013 : 03:58:41
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| Thank you very much |
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| Reply #5
benaknoun
Spain
133 Posts |
Posted - 07/13/2013 : 13:03:59
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Another question please:
To desolder a TSOP56, i have a preheating station, to which temperature should i preheat the board?
To which temperature should i set the preheater?
Thanks again |
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| Reply #6
ZLM
2945 Posts |
Posted - 07/14/2013 : 20:19:33
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| Depending on your board. IF your board has no plastic part, then you can preheat to 200C. The preheat can be used to reduce the on-hot-air time. |
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| Reply #7
benaknoun
Spain
133 Posts |
Posted - 07/15/2013 : 14:07:21
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| Thank you ZLM |
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Topic |
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Correct temperature / air pressure / nozzle size
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