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polihedron / DIY-Reflow-Oven

DIY Reflow Oven, mcu: STM32F103 dev board, Display: Nextion Basic 3.5", PID controller.
BSD 3-Clause "New" or "Revised" License
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Cold junction compensation? #7

Closed PricelessToolkit closed 2 years ago

PricelessToolkit commented 2 years ago

Hi @polihedron, I want to do the same project and I have two questions if it's not difficult help me figure it out.

  1. maybe you checked the whole area in the oven is heated evenly? I bought T-962A+ it does not warm up evenly, Cannot be used without full modification.
  2. In the future do you have plans to implement cold junction compensation with a 1-wire temp sensor like DS18B20?
  3. Thanks
polihedron commented 2 years ago

Hi there, to be honest I didn't bother is whole area in the oven heated evenly, because there is still quite wide temperature offset for each reflow stage in solder paste datasheet. I checked two large pcbs (171mmx131) for power leds and I'm happy with results:

IMG_20220424_131954

Regarding to implement cold junction compensation, have you checked MAX6675 datasheet?

max6675

Kind Regards

polihedron commented 2 years ago

@PricelessToolkit do you have any other questions regarding cold-junction compensation issue?

PricelessToolkit commented 2 years ago

@polihedron No, Thank you very much for responding.

polihedron commented 2 years ago

@PricelessToolkit ok, good luck with project and T-962A+ mod.