Title: T962A IRreflow oven setting for Sn42Bi58 Solder paste
Post by: CND on May 02, 2014, 03:16:15 pm
Post by: CND on May 02, 2014, 03:16:15 pm
I was looking in D.P forum for setting solution to our IR reflow Oven on Sn42Bi58 solder paste , when I noticed at post viewtopic.php?f=68&t=4903&start=165#p50701 (http://dangerousprototypes.com/forum/viewtopic.php?f=68&t=4903&start=165#p50701)
that A.M is using Similar process for Reflow soldering i.e (IR reflow oven + Sn42Bi58 solder Paste) . Now let me explain you in detail about the issue we are trying to fix.
Our IR oven is T-962A similar to QS-5180C from Qinsi Technology . we are using Sn42Bi58 solder paste from Synaptic Tin tin lead-free solder paste (Sn42Bi58 3.0 P/N# UP301B) (Purchase from manufacturer via Taobao http://item.taobao.com/item.htm?spm=a1z ... 517179090# (http://item.taobao.com/item.htm?spm=a1z10.5.w4002-414905706.20.p8t7jb&id=18517179090#) ) Sn42Bi58 3.0 is little bit more smooth/finer than Sn42Bi58 2.5.
Now the problem is, I have never used this Sn42Bi58 paste before, usually I use SAC>SnAgcu paste. So I bought it in January , but stored it in refrigerator as I used previous stock left some SAC paste. Two days ago I open that 500mg pack to test , and surprisingly even after 6 month solder paste is in very good condition/flux constant is also good, because we store it 0-5 C temp. So in order to test this paste I required to set the temperature profile of my Oven. So I set the reflow profile by referring some documents/datasheet for SnBi paste available on internet. After running couple of test reflow process on a sample PCB, I noticed that the paste does not melt even at 160-170 reflow range. when i took out PCb and test the paste, I found that Flux is doing its work at expected temperature but metal part is not. I had used 6-7 different temperature setting for calibration referring the attached datasheets.
So can any member help me to figure out what am I doing wrong with the process.
If you need more details on temperature profile I have used on it. let me know, I will share it. Reflow temperature profile that I used as reference are linked below.
From Qualitek Bi58 http://www.qualitek.com/bi58_888Dtds.pdf (http://www.qualitek.com/bi58_888Dtds.pdf)
From AIM solder http://www.aimsolder.com/sites/default/ ... _rev_1.pdf (http://www.aimsolder.com/sites/default/files/nc273lt_sn42-bi58_solder_paste_rev_1.pdf)
Temperature from from Solder paste manufacturer from China.
-Chinmay
that A.M is using Similar process for Reflow soldering i.e (IR reflow oven + Sn42Bi58 solder Paste) . Now let me explain you in detail about the issue we are trying to fix.
Our IR oven is T-962A similar to QS-5180C from Qinsi Technology . we are using Sn42Bi58 solder paste from Synaptic Tin tin lead-free solder paste (Sn42Bi58 3.0 P/N# UP301B) (Purchase from manufacturer via Taobao http://item.taobao.com/item.htm?spm=a1z ... 517179090# (http://item.taobao.com/item.htm?spm=a1z10.5.w4002-414905706.20.p8t7jb&id=18517179090#) ) Sn42Bi58 3.0 is little bit more smooth/finer than Sn42Bi58 2.5.
Now the problem is, I have never used this Sn42Bi58 paste before, usually I use SAC>SnAgcu paste. So I bought it in January , but stored it in refrigerator as I used previous stock left some SAC paste. Two days ago I open that 500mg pack to test , and surprisingly even after 6 month solder paste is in very good condition/flux constant is also good, because we store it 0-5 C temp. So in order to test this paste I required to set the temperature profile of my Oven. So I set the reflow profile by referring some documents/datasheet for SnBi paste available on internet. After running couple of test reflow process on a sample PCB, I noticed that the paste does not melt even at 160-170 reflow range. when i took out PCb and test the paste, I found that Flux is doing its work at expected temperature but metal part is not. I had used 6-7 different temperature setting for calibration referring the attached datasheets.
So can any member help me to figure out what am I doing wrong with the process.
If you need more details on temperature profile I have used on it. let me know, I will share it. Reflow temperature profile that I used as reference are linked below.
From Qualitek Bi58 http://www.qualitek.com/bi58_888Dtds.pdf (http://www.qualitek.com/bi58_888Dtds.pdf)
From AIM solder http://www.aimsolder.com/sites/default/ ... _rev_1.pdf (http://www.aimsolder.com/sites/default/files/nc273lt_sn42-bi58_solder_paste_rev_1.pdf)
Temperature from from Solder paste manufacturer from China.
-Chinmay
Title: Re: T962A IRreflow oven setting for Sn42Bi58 Solder paste
Post by: Shlomokochva on June 30, 2014, 03:46:45 pm
Post by: Shlomokochva on June 30, 2014, 03:46:45 pm
I am considering to buy 962A. What is the forum members experience? it will be used for Prototypes and low volume manufacture lots. Do you know the difference between 962A to 962C?
Did any of you use PNP machine SMT50 or SMT01? What is the forum members experience
Did any of you use PNP machine SMT50 or SMT01? What is the forum members experience
Title: Re: T962A IRreflow oven setting for Sn42Bi58 Solder paste
Post by: CND on July 31, 2014, 06:38:22 am
Post by: CND on July 31, 2014, 06:38:22 am
Hello
Yah 962A works good . But you need to calibrate before using. The timer inside 926A has delay lag of 1.2sec to 1.5sec. Means On the LCD you will be seen the process is running 7-8mins, but in real world the time will be 10-12 mins. Definitely you don't want to over bake your PCBs. So you have to set your temperature profile. Also Heat distribution around the far corners are not same as center area. But I got solder a A4 size PCB panel without any issue. Also we made a custom Zing to hold PCB for Double Side SMT Soldering.
Also for the Above SnBi Solder paste, we manage to set temperature setting after so research and it works very good.
Remember that the device is made for China, so when you want to use in your comfort zone, you have to make necessary modification. We are running micro production of 500-1000 units Boards per month and the reflow Oven is working perfectly over 2 years.
-Chinmay
Yah 962A works good . But you need to calibrate before using. The timer inside 926A has delay lag of 1.2sec to 1.5sec. Means On the LCD you will be seen the process is running 7-8mins, but in real world the time will be 10-12 mins. Definitely you don't want to over bake your PCBs. So you have to set your temperature profile. Also Heat distribution around the far corners are not same as center area. But I got solder a A4 size PCB panel without any issue. Also we made a custom Zing to hold PCB for Double Side SMT Soldering.
Also for the Above SnBi Solder paste, we manage to set temperature setting after so research and it works very good.
Remember that the device is made for China, so when you want to use in your comfort zone, you have to make necessary modification. We are running micro production of 500-1000 units Boards per month and the reflow Oven is working perfectly over 2 years.
-Chinmay