Very nice Zach! I really like the fact that you didn't over engineer it. Last week I almost threw away the one I started a number of years ago because I still haven't finished it. I tried to make it too complicated. Yours is just right!
I make everything over complicated too. It's what makes us engineers! On an unrelated note, I have been wanting to try powder coating and this oven could also work for baking powder coated parts! Now you have a second use for that oven that you almost threw away!
If you are looking for a TH-cam idea, I'd love a tutorial on tuning and programming a PID loop in the real world. Taht, after all, is where the magic is in this project. Without it there is nothing.
That kind of oven heats very unevenly though, whenever I bake something in it the middle parts get much more browning than the borders due to higher IR exposure. Using this for reflow you might either get cold joints in the edges or overstress components near the middle. Also you should consider that the thermocouple might not accurately measure the temperature the PCB will be in since the board will be receiving direct IR radiation in a large area, and the thermocouple has a very small area footprint. A larger convection oven or one with multiple, spread out heating elements would be much more adequate for this, and I'd maybe using a plate head thermocouple in order for it to receive more IR so you get more accurate readings
Heat sink is usually required on the SSR when switching larger loads. See the device data sheet and read the nameplate on the appliance being switched. I'd rather gut the controls from the oven completely and just wire directly so that the over can't be used for food.. But keep the controller outside the oven enclosure where it's cooler. Mount to the outside with a hole for an inverted U duct with a pwm fan for the cooling profile.
What "code" did you use to "rotate" the resistive touch panel so it matches up with the buttons? I put you code in my Mega and the resistive touch (per the parts supply list), but the touch coordinates are not "rotated" with the screen. The touch is un-movable and x/y is in the portrait position, but the graphics (buttons etc.) are in land scape. Could you post your code that you used to fix this?
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do you have a schematic or wiring diagram available that shows how everything is connected
I think any toaster oven that doesn’t have digital controls would work. I use an cheap 20$ walmart brand one with quartz heating elements. I mightve missed him mention it. But basically you just turn timer off on toaster and set it to max temp. The relay will keep rapidly turning it on off to regulate the temperature
PID measures and produces an analog input/output. Therefore the light would not turn on and off but would dim and brighten. My guess is that your using some modification of on-off control which is traditionally used for controlling thermal systems.
@@Bill_N7FTM Sorry to disabuse you, but back home in dear Old Blighty, solder IS pronounced with an 'L'. For those who don't know, Blighty is that quaint little island off the coast of Europe which err... invented the English language! See Polder (Dutch Land reclaimed from the sea)!🤣😂😁
The knob is to keep you from putting it directly against the wall where it might overheat or start a fire.
My very first thought on the knob. There's only a single steel wall separating 400° inside with 72° outside.
And possibly to avoid bend the power cord too sharply against the wall.
Very nice Zach! I really like the fact that you didn't over engineer it. Last week I almost threw away the one I started a number of years ago because I still haven't finished it. I tried to make it too complicated. Yours is just right!
I make everything over complicated too. It's what makes us engineers! On an unrelated note, I have been wanting to try powder coating and this oven could also work for baking powder coated parts! Now you have a second use for that oven that you almost threw away!
That UI is really slick, especially the graph-view.
If you are looking for a TH-cam idea, I'd love a tutorial on tuning and programming a PID loop in the real world. Taht, after all, is where the magic is in this project. Without it there is nothing.
Awesome project and video, thanks Zach!
Thanks Becky!
Perhaps that knob is to prevent the hot back of the oven touching the wall behind?
Or something to wrap the cord around. My oven has two knobs for storing the cord.
Definitely for wall clearance.
I would add a vertical moving axis on the plot to know the current time of progress
It's hard to see, but the line gets bigger
That kind of oven heats very unevenly though, whenever I bake something in it the middle parts get much more browning than the borders due to higher IR exposure. Using this for reflow you might either get cold joints in the edges or overstress components near the middle. Also you should consider that the thermocouple might not accurately measure the temperature the PCB will be in since the board will be receiving direct IR radiation in a large area, and the thermocouple has a very small area footprint. A larger convection oven or one with multiple, spread out heating elements would be much more adequate for this, and I'd maybe using a plate head thermocouple in order for it to receive more IR so you get more accurate readings
Heat sink is usually required on the SSR when switching larger loads. See the device data sheet and read the nameplate on the appliance being switched.
I'd rather gut the controls from the oven completely and just wire directly so that the over can't be used for food..
But keep the controller outside the oven enclosure where it's cooler. Mount to the outside with a hole for an inverted U duct with a pwm fan for the cooling profile.
is this a real PID controller? or is it just an on/off controller?
heating is generally just on/off
Awesome project and video. Cheers!
Very cool indeed. Probably gonna make this! THANKS
What "code" did you use to "rotate" the resistive touch panel so it matches up with the buttons? I put you code in my Mega and the resistive touch (per the parts supply list), but the touch coordinates are not "rotated" with the screen. The touch is un-movable and x/y is in the portrait position, but the graphics (buttons etc.) are in land scape. Could you post your code that you used to fix this?
do you have a schematic or wiring diagram available that shows how everything is connected
that is actually amazing
I need to build one of these!
Is there a schematic for this project?
Is there a manufacturer and part # for the oven you chose that you can share for this project?
I think any toaster oven that doesn’t have digital controls would work. I use an cheap 20$ walmart brand one with quartz heating elements. I mightve missed him mention it. But basically you just turn timer off on toaster and set it to max temp. The relay will keep rapidly turning it on off to regulate the temperature
The files in github are missing the wiring diagram, good work, i appreciate it 😊
PID measures and produces an analog input/output. Therefore the light would not turn on and off but would dim and brighten. My guess is that your using some modification of on-off control which is traditionally used for controlling thermal systems.
Need a schematic pretty please
But what if we like tedious? The management thinks I'm amazing firnturning PWBs into PCB assemblies.
Temp control would be more stable if you epoxied the thermocouple to a small mass like a penny or even a small piece of scrap PCB.
That can be solved by adjusting the PID.
I think I'll buy a new toaster oven for my food, and down grade my old toaster oven for this purpose.
Awesome :)
Its flipping SOUL-der not SOD-der for flip's sake! Good little example of PID Control though!
How do you pronounce Salmon?
Uh, no. The "L" is silent. The name come from the old English word, souder.
@@Bill_N7FTM Sorry to disabuse you, but back home in dear Old Blighty, solder IS pronounced with an 'L'. For those who don't know, Blighty is that quaint little island off the coast of Europe which err... invented the English language! See Polder (Dutch Land reclaimed from the sea)!🤣😂😁
@@ChuffingNorah You also corrupted it. ;)
@@emmettturner9452 Yawwwnnnnn! 🤔🥱😫😩😞😣😖