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5 zone oven profile

Views: 6926


gaz

#64057

5 zone oven profile | 30 March, 2011

Hi,

We are using ws488 sn100c paste.

Anyone have a profile for a 5 zone oven that has worked well for you?

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#64059

5 zone oven profile | 31 March, 2011

While you're waiting, consider giving your paste manufacturer a call. They should have a database of recommended, or starting point profiles based on what oven you have.

cheers, ..rob

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#64067

5 zone oven profile | 1 April, 2011

starting point with zone settings would be, 100 / 160 / 200 / 225 / 260 deg C...but you'll have to check the exact profile on the pcb with a reflow profiler....making sure you meet the paste spec and making sure you don't heat any devices up to quickly or get any too hot. If you don't have a profiler get your paste supplier to bring one in and do the set up for you.

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gaz

#64078

5 zone oven profile | 4 April, 2011

This VIP70 has thermocouple inputs, so I'm hoping that's a good enough profiler.

I tried a fairly different profile than you mentioned, so will test your settings today as well.

If anyone has opinions, please jump in.

Thanks!

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#64080

5 zone oven profile | 5 April, 2011

one of my customers with a BTU VIP 70 has the following settings, 100 / 175 / 210 / 250 / 265 with conveyor speed of 18 ins per minute. They get a peak temp of 240~245C and time above liquidus of 220 C is @ 55 secs. Built in thermocouples should give you a good idea of the profile.

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gaz

#64087

5 zone oven profile | 5 April, 2011

That's very helpful, and much appreciated.

I know it's a long shot, but I don't suppose you know what paste they are using with these settings. I am testing with sn100c ws488.

Thanks!

kinos

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#64090

5 zone oven profile | 5 April, 2011

It is one of our pastes...Almit LFM48 W TM-HP, a high reliability no clean solder paste based on SAC305 with a size 4 powder. It's a paste that works so well we have thousands of users of it worldwide. Why are you using SN100C alloy paste ? I imagine the paste may be a few dollars cheaper but the reflow process window has to be smaller...What problems are you having... ?

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gaz

#64092

5 zone oven profile | 5 April, 2011

We are not having any real issues. I am just first setting up a lead free profile, and was looking for a starting place. So far it's going well.

Can you tell me more about why your paste would be better and I'll pass that on to the decision makers?

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#64095

5 zone oven profile | 6 April, 2011

Almit are specialists in formulating fluxes for pastes and wires for the very very demanding Japanese assembly market. And the key to good SMT is how the flux performs...and our formulation improvements are driven by requests from the companies who are leading in the race to implement miniaturisation...so by default if our materials work well at the leading edge of technology they work really well for standard applications. I could go on....but we don't make any water wash products.

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gaz

#64102

5 zone oven profile | 6 April, 2011

ok, thanks very much for your help.

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Reflow Ovens thermal process improvement