Electronics Forum | Mon Oct 08 14:52:13 EDT 2018 | emeto
+paste was not stored properly Paste doesn't have enough flux and is more sticky than usual. Could be a lot code related or a purchase order related. I wold order a new jar and try immediately.
Electronics Forum | Wed Oct 10 07:26:18 EDT 2018 | cyber_wolf
I do not agree with that. Stainless is typically used and it works fine. We run many different paste types, RMA, no clean, WS, PB, Pb Free. No sticking issues. You can spend the extra money and buy coated blades but it is not necessary for most ap
Electronics Forum | Wed Oct 17 10:38:11 EDT 2018 | reckless
What is slope? Solder flow issues seem unlikely for long runs with few parts. Im focused on my application which I think is simple compared to a contract manufacture.
Electronics Forum | Mon Oct 15 11:07:36 EDT 2018 | davidsmullins
Because if you can't see it, you can't verify it is acceptable or not.
Electronics Forum | Thu Oct 18 11:29:04 EDT 2018 | davidsmullins
I understand and agree. However, we are not on contract to provide x-ray inspection and I could certainly not get a purchase of one approved for this one project.
Electronics Forum | Thu Oct 18 16:03:14 EDT 2018 | emeto
Yes, send them out or take a few samples and go to a place where you can use the machine or be with the product -based on the product security required. That way you can remove or confirm your suspicions.
Electronics Forum | Fri Nov 16 07:55:17 EST 2018 | robl
Hi Prem, We used to place millions of Nickel battery tabs using Cobar paste. We found it particularly aggressive. Just contact your local Cobar distributor and ask them for samples of their most aggressive fluxed paste. Kind regards, Rob.
Electronics Forum | Fri Nov 16 09:04:40 EST 2018 | robl
and here.... https://smtnet.com/Forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=9389&#Message37375 Which was in the days of leaded, but the ROHS paste had the same flux formulation.
Electronics Forum | Fri Jan 04 07:44:37 EST 2019 | bane016
Try to measure the profile again by datasheet..with the result that you will reduce the temperature in the areas below...increase the upper temperatures as needed according to the properly measured profile...I hope you can solve the problem like this
Electronics Forum | Fri Jan 04 08:02:03 EST 2019 | ameenullakhan
Hi, Thanks for the valuable feedback. We are at lower spec : ( TAL )Reflow time : Around 50 Sec ( Above 217 deg C) Peak Temp : 240- 245 deg C. Any other suspects. And your English is fine :) Regards, Ameen
