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PID Controlled And Insulated Toaster Oven | DIY

19 Jul 2019 | about 4 months ago

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Made another PID controlled oven to use in my upcoming projects.
Here in the new workshop I don't have access to a kitchen oven so I really needed something big enough to temper some of my longer blades. This will come in handy also to dry out stuff like wood for stabilization and to cook and cure well plaster molds for metal casting projects!
A real handy tool to have overall I think.
It's also pretty easy to build, even without metalworking tool, the eletronics can be left outside in any kind of box and it would make this project way easier! Of course be carefull with mais voltage if you try this, eletricity is sneaky!
And before you ask, the main reason why I don't use my high temperature oven to also temper blades is that I have to wait for it to cool down to tempering temperatures and that can take a really long time from, let's say, 1080°c.

So, the core of this oven is, well... A toaster oven! I found this one at my local thrift store for only 10€ because it was missing all the knobs. But it was otherwise new. So absolutely perfect for me!
Other components are the insulating ceramic wool and the PID controller kit that comes with K-type thermocouple, ssd relay and nice aluminum heat sink. Here are a couple links of similar item (yes, affiliate links, buy wherever you like)
https://amzn.to/2Y3Nce6
https://amzn.to/2XTpg1Q

Off camera I had to istall a 12v power supply for the PID as the one I got was not rated to work with 220v (unlike the other one I have on my high temp oven) and I also ended up doubling the insulating wool near the controller as it was still getting pretty hot near the heating elements.


List of producst and operations:
0:40 Remove unnecessary components, left only heating elements and fan
1:26 Cut opening for new control panel with angle grinder and cut off disk using masking tape as straight line reference
2:07 Cut metal sheet stock for the new control panel with metal cutting band saw (funny enough this metal comes from another oven, a microwave oven I took apart a while back)
2:30 Adapt a home switch for the control panel. I have some laying around with no better use.
2:43 Mark position for holes
3:00 Cut those holes with dremel tool
4:30 Drill holes for rivets to hold the new panel in place
5:27 3.5mm rivets, so easy to pop!
6:00 Black spray paint... Why not.
6:40 Install thermocouple
7:05 Ssd replay installed with thermal paste between back and heat sink
7:40 Stuff connected following PID instruction manual. Very easy for real, just 6 wires or so
8:17 Ceramic wool
8:40 Tried to use some in every side of the toaster chamber, except the front glass door of course
That's all! Make one if you need one, it's easy!

Thanks a lot for watching, I hope you liked the video!
Suggestions and comments are welcome.
Leave a like and share to anyone who might be interested!

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