HT oven build

My guess is that the lamp contact for the switch is on the hot side, not the switched side. Or, the switch is the LED type that is always illuminated as long as it is pugged in.
 
installed the top bricks and the hanger support for the thermocouple.

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assembly finished.

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fired it up to 1500*

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here is a little video of it.

https://youtu.be/TbqvDvsnoO4

still not sure I fully understand the controller. going to need to keep studying and trying things.
 
the controller wasn't set right so it took a while. it stalled out at about 1470 but I could see the heat cycling on and off and it seemed like it wasn't heating long enough in the cycle to get it to ramp. I ran an auto tune on it and it then continued ramping. I'm still not sure I set it correctly in the end. I'll report back when I'm more confident in what I'm doing.
 
Another thing. Is there any reason that you want to put the controller that far from the Oven. As I known that the thermal couple will generate very small voltage, in some online document that I've read they recommend that it will be better to put the controller closer to it.
 
The distance itself is not really an issue. At work, I've run thermocouples with cables hundreds of feet long. The problem usually tends to be when there are thermocouple cables running near power cables which causes an induced Voltage in the thermocouple cable. There are whole books on the subject, so it's probably beyond the scope of a BF post, other than to advise keeping as much separation between the power-carrying cables and the thermocouple cables as you can, and if the controller has a filter setting in its programming, set it to your mains frequency.

Using the correct thermocouple cable is important too.


mrlocchoc said:
Another thing. Is there any reason that you want to put the controller that far from the Oven. As I known that the thermal couple will generate very small voltage, in some online document that I've read they recommend that it will be better to put the controller closer to it.
Click to expand...
 
Nice looking Build Jerid! Where did you get the ceramic insulating blocks and brass connectors from. I have a HT oven that I need to finish building this winter, but still need to gather a few parts.

Is that a Harbor Freight cart the oven is on?
 
melsdad said:
Nice looking Build Jerid! Where did you get the ceramic insulating blocks and brass connectors from. I have a HT oven that I need to finish building this winter, but still need to gather a few parts.

Is that a Harbor Freight cart the oven is on?
Click to expand...
ceramic insulators came from Paragon and include the brass connectors if I recall correctly.

yes, HF cart. not as sturdy as I'd like. probably better off welding up my own.
 
Finally got around to documenting the parts list and sources..

QTY Part Number Description Price Source
1 TC-K-KLN High Temperature Thermocouple 12 inch, Probe Wire diameter 11ga $ 27.75 Auber Instruments www.auberins.com
1 SYL-2352P PID Temperature Controller W/ Ramp & Soak For SSR $ 78.95 Auber Instruments www.auberins.com
2 HS40ET External Mount Heat Sink for 40A SSR $ 40.00 Auber Instruments www.auberins.com
1 PBox16 Box for 1/16 DIN Controller 8x5.5x9” $ 29.67 Auber Instruments www.auberins.com
2 MGR-1D4840 40A SSR (Solid State Relay) $ 31.00 Auber Instruments www.auberins.com
1 SW15 Illuminated short profile 22mm push button maintained action. Block option 2NO. 120VAC/DC, Green $ 13.98 Auber Instruments www.auberins.com
1 SW15 Illuminated short profile 22mm push button maintained action. Block option 2NO. 120VAC/DC, Red $ 13.98 Auber Instruments www.auberins.com
1 TCCON Panel mount connector for K thermocouple $ 5.89 Auber Instruments www.auberins.com
8 K type thermocouple extension wire multistranded 8’ $ 10.00 Auber Instruments www.auberins.com
1 High temp wire, 12ga, 6’ $ 24.99 Budget Casting Supply www.budgetcastingsupply.com
1 Kanthal Pin Wire, 12’ $ 13.00 Budget Casting Supply www.budgetcastingsupply.com
1 ELKM24 Heating element ELC KM24 240V 22OHM #41640 $ 91.35 Paragon www.paragonweb.com
1 MS1 Porcelain Insulators $ 8.00 Paragon www.paragonweb.com
25 Softbrick2300 Insulating Soft Brick 2300* $ 108.75 Aardvark Clay and Supply www.aardvarkclay.com
1 30A locking outlet $ 25.98 Home Depot
1 30A locking plug $ 22.90 Home Depot
~ Miscelaneous connectors, fuses, and small parts $ 20.00 Various vendors
2 16GA steel Angle 1.5x1.5” x 10’ $ 19.20 Industrial Metal Supply www.industrialmetalsupply.com
1 16ga steel channel 1.5”x3”x10’ $ 33.91 Industrial Metal Supply www.industrialmetalsupply.com
4 16GA cold rolled steel sheet $ 38.44 Industrial Metal Supply www.industrialmetalsupply.com
2 Barstock $ 2.78 Industrial Metal Supply www.industrialmetalsupply.com
2 Steel Hinges $ 1.67 Industrial Metal Supply www.industrialmetalsupply.com

Total build cost not including wire (I used what I had on hand) came to about $662.
 
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