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mission:resources:picoreflow [2016/06/21 05:04] – [Software] chronomission:resources:picoreflow [2016/10/27 22:33] (current) – [Heating] chrono
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 More and more semiconductors are produced in packages (the chip's case) which have become impossible to hand solder with a solder iron. The switch from through-hole (THT) to surface mount technology (SMT) has actually made hand soldering much easier (although still many believe the opposite to be true) but now we are faced with BGA and other packaging forms which only have contacts on the bottom of the chip.  More and more semiconductors are produced in packages (the chip's case) which have become impossible to hand solder with a solder iron. The switch from through-hole (THT) to surface mount technology (SMT) has actually made hand soldering much easier (although still many believe the opposite to be true) but now we are faced with BGA and other packaging forms which only have contacts on the bottom of the chip. 
  
-In order to be able to work with these chips, a reflow solder process is needed. So we've built our own DIY reflow oven, using a Raspberry Pi as a universal, web enabled, PID Reflow Oven Controller driving a convectional hot air oven originally designated for gastronomy/bakery purposes. Since it's all open-source you may also use it to build the world's most sophisticated pizza oven controller and experiment with temperature curves for fresh/frozen pizza :)+In order to be able to work with these chips, a reflow solder process is needed. So we've built our own DIY reflow oven, using a Raspberry Pi as a universal, web enabled, PID Reflow Oven Controller driving a convectional hot air oven originally designated for gastronomy/bakery purposes.  
 + 
 +Since it's all open-source you may also use it to build a kiln controller, the world's most sophisticated pizza oven controller and experiment with temperature curves for fresh/frozen pizza and has also been reported to be used in other lab/production processing systems and autonomous climate testing.
  
 <WRAP round alert> <WRAP round alert>
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 ==== Heating ==== ==== Heating ====
 +
 +=== Load Wiring ===
 +
 +{{:mission:resources:picoreflow-ssr-load-connection.png|}}
 +
 +=== Signal Wiring ===
  
 SSR connected to P1-23 SSR connected to P1-23
  
 +^ PullDown Connection (default) ^ PullUp Connection (alternative) ^
 +| {{:mission:resources:picoreflow-ssr-signal-pulldown-connection.png?320|}} | {{:mission:resources:picoreflow-ssr-signal-pullup-connection.png?320|}} |
 +
 +
 +The default configuration has historically been to use the PullDown config, which results in an inverted control logic: When you pull GPIO23 low, the heater is switched on and when you pull GPIO23 high, the heater is switched off. 
 +
 +<WRAP round important>
 +**Please keep in mind that you'll have to have some script/code in your setup that makes sure that GPIO23 is pulled high as soon as the system has booted** (to be sure the heater is off) or change your setup to PullUp configuration instead, if you don't want to worry/bother.
 +</WRAP>
 ==== Cooling ==== ==== Cooling ====
  
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 <WRAP round info> <WRAP round info>
-**Although picoReflow seems to become ever more popular and is working fine, it has its limits in terms of flexibility and use-case adaptability: It was only designed and catered to the parameters of reflow soldering control.**\\+**Although picoReflow seems to become ever more popular and is working fine, it has its limits in terms of flexibility and use-case adaptability: It was only modeled and catered to the parameters and constraints of a reflow soldering process.**\\
    
 With the help of a lot of people giving feedback and using picoReflow in the wild, it was easy to see that a more flexible, modular and powerful approach would be needed to become a fully autonomous, multi-module governing/monitoring bot for any DIY appliance. She calls herself [[https://github.com/apollo-ng/governess|governess]] but she's still not ready for anything yet but it's progress. More appliance/module/driver/task modelling/linking will be required. It has to be totally data-driven in order to offer any useful flexibility. With the help of a lot of people giving feedback and using picoReflow in the wild, it was easy to see that a more flexible, modular and powerful approach would be needed to become a fully autonomous, multi-module governing/monitoring bot for any DIY appliance. She calls herself [[https://github.com/apollo-ng/governess|governess]] but she's still not ready for anything yet but it's progress. More appliance/module/driver/task modelling/linking will be required. It has to be totally data-driven in order to offer any useful flexibility.
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 A custom built oven to bake carbon composite parts.   A custom built oven to bake carbon composite parts.  
 +
 +==== WiFi/Raspberry Pi pottery kiln controller ====  
 +
 +{{:mission:resources:kilnrunning.jpg|}}
 +
 +http://succulentceramics.com/2016/10/07/wifiraspberry-kiln-controller/
 +
  
 {{tag>research lab reflow oven pid controller raspberry pi picofab software hardware}} {{tag>research lab reflow oven pid controller raspberry pi picofab software hardware}}
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