- Tue Mar 24, 2009 1:41 pm
#69192
Really? 5 minutes? I've never seen that recommendation before.
Right now I ramp from 25C to 150C in about 1 minute.
I read about the lower pre-heat temperature to slow down the flux out-gassing (exploding), but 85C? Hmmm.
So you want the flux dry by the time the reflow portion of the cycle begins? I thought heating for too long burned off the flux activators.
Oh well. Can't hurt to try it on a test board.
So what would your parameters be?
ramp to 85C and hold for 5 minutes.
ramp to 150C for X seconds?
ramp to 220C and hold for Y seconds?
Right now I ramp from 25C to 150C in about 1 minute.
I read about the lower pre-heat temperature to slow down the flux out-gassing (exploding), but 85C? Hmmm.
So you want the flux dry by the time the reflow portion of the cycle begins? I thought heating for too long burned off the flux activators.
Oh well. Can't hurt to try it on a test board.
So what would your parameters be?
ramp to 85C and hold for 5 minutes.
ramp to 150C for X seconds?
ramp to 220C and hold for Y seconds?