T200 Reflow oven cooling

Chat about pick and place machines, reflow ovens, assembly techniques and other SMT tips & trix

Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.
Locked
User avatar
dan.grlx
 
Posts: 11
Joined: Tue Mar 05, 2013 3:57 pm

T200 Reflow oven cooling

Post by dan.grlx »

The T200 bench top oven. I'm getting 0.9C per second cooling. Is the PCB board cooling down to slow?
Not sure if you are suppose to open drawer after reflow to cool PCB board faster. I read somewhere that pcb should not cool down faster the 6C per second. So cooling it down too fast is not good?yes/no?

User avatar
alphatronique
 
Posts: 231
Joined: Fri Jun 25, 2010 8:30 am

Re: T200 Reflow oven cooling

Post by alphatronique »

Qoute ... From solder past Datasheet ...

Cooling Stage:
A rapid cool down is desired to form a fine grain structure.
Slow cooling will form a large grain structure, which typically
exhibits poor fatigue resistance. The acceptable cooling
range is 0.5°C-6.0°C/second (2.0°-6.0°C/second is ideal).

P.S. over 6 Deg second you will make thermal stress to PCB and risk of wrap it ..
normally on batch drawer type oven you open door for help coling

Locked
Please be positive and constructive with your questions and comments.

Return to “SMT (Surface Mount Tech)”