this morning i did a last test-run with the tweaked Felder ISO-Cream profile:

yeah... at the top i thought it is in the cooling step already and opened the window - with ~3°C cold air from outside it dropped fast.. then i found it is in the middle of the reflow - sorry... and closed the window again - until it really switched to cooling..

the old left-over pcb i use for these is done now.. i comes from my LEDBoard_4x4_16bit project - and if i remember correctly i backed it while assembling the  boards in the oven multiple times back then.. now grilled it again ~4-7 times. it smells very bad - is super dark discolored.. i think that is ok with about ~12 solder cycles..

and then started to assemble a simple board to really test the profile :-)

then reflowed:

i added a paper-lid to have stable air inside..

reflow was successful :-) my profile is just a little bit to long for my right angle touch switches:

they melted away :-( - lesson learned - have a look in the datasheet and you know that they are very heat sensitive!

in general i have the feeling that my heating elements get a little bit to hot - the pcb also slightly discolored at on place...
so will keep an eye on this and improve it..

Open Points

• add housing
  • i would like to have class at the top for a good view what is happening inside..
• metal frame for heating-elements
• quite 5V fan with PWM control for cooling
• add second temperature sensor
  • contact-less melexis MLX90614ESF ??
• spring thing to hold board down
• way to fix sensor position on board
• more heating elements for bigger working area
  • switchable configuration for long or more square pcbs?!
• bigger power supply ?! (~750W)