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Main Boards => The Bowyer's Bench => Topic started by: Flem on October 11, 2018, 03:55:59 PM
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I finally put together my temp control module. Thanks to skeaterbait, for the inspiration. Their was a thread awhile ago about thermostats for heat boxes, which got me excited (doesn't take much). I originally was looking for a plug and play model, but there was nothing for my 240v element. I did find a controller that would work on any voltage, they are called PID controllers and apparently they are essentially the same as a cruise control unit. They don't work work as an on/off switch, they modulate the output to keep the actual temp as close to the set temp as possible.
I need to state, it is overkill for a bow box, but it works so well. I do have some other uses in mind, I can use it to cool my greenhouse in the summer and heat in the spring/fall seasons. I also plan to use it to control a kiln to heat treat some A2 steel.
The funky layout in the box, is so I could access all the terminals on the switches and outlets. I added a 120v outlet, which is on as long as the unit is plugged in, to run a axial fan in the box. The switch turns on everything else. The fan is awesome, no hot spots while your baking. The whole shebang was not expensive either, $33. for the PID unit, solid state relay, heat sink and thermocouple. I got the rest of the parts at my favorite discount store, Habitat for Humanity. Total cost was just under $50. The muffin fan,I bought awhile ago, was $17.
This thing is pretty sweet and I would recommend it for anybody thats upgraded from lightbulbs as a heat source. I am using a 300 watt element salvaged from a baseboard heater, which takes 12min to go from 57 to 160 degrees. [ You are not allowed to view attachments ] [ You are not allowed to view attachments ]
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I forgot to post a pic of the fan. Its rated to 250deg.
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Nice job...
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Didn't Clark Griswald have a setup like that?
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That's where he got the plans.
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http://hotsyequipment.com/equipment/hotsy-heat-cannon/
Make a hole in your heatbox and install one or two of these and your glue is cured in no time. ;)
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HA Bue that may be a crispy critter to.
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Very innovative. I may go this way in the future, but for now I'm still in the stone ages with my lightbulbs.... ;)
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Clark Griswald? Isn't that the guy from National Lampoon Vacation? Actually this evolved over many years. I first used light bulbs, then switched to infrared emitters, then halogen puck lights and a heat gun. Finally after being constantly impatient, waiting for the box to get to temp, I found this baseboard heater on a remodel job and the light bulb went on and off for good. The fan came into use because the element created one hell of a hot spot.
I would be interested to see Griswold's setup, always room for improvement.
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Clark Griswald? Isn't that the guy from National Lampoon Vacation? Actually this evolved over many years. I first used light bulbs, then switched to infrared emitters, then halogen puck lights and a heat gun. Finally after being constantly impatient, waiting for the box to get to temp, I found this baseboard heater on a remodel job and the light bulb went on and off for good. The fan came into use because the element created one hell of a hot spot.
I would be interested to see Griswold's setup, always room for improvement.
Yep, and Christmas vacation. I was just yankin your chain, I envy your ability to put one of those together. Mine would end up more like the Griswald Christmas light power source.
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Sweet! I'm making that next, after I convert my 89' Corolla into a time machine.
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Very nice set up ,I bought one of those inkbird cruise controls but it only worked in the cooling mode ,I sent it back and Im back to manual shift 😃
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Very nice set up ,I bought one of those inkbird cruise controls but it only worked in the cooling mode ,I sent it back and Im back to manual shift 😃
I just revisited the old thread where skeaterbait told us about his Inkbird unit. It looks like you got a temp controller also. Might look into a PID instead, next time.
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It is a kind of a bummer yours didn't work. I have had two of them so far and no trouble from either. I looked in to PID's but I ain't got the schoolin to make one work.
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Skeats mine would only work in the cooling mode must have got a bad one lucky me I dont know any thing about the Pid I just need light bulbs control nothing like Flem uses you are the gizmo king 😃
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Dang, those high tech gwass bows gots to be hard ta make...
I flip dah light switch and dah bulb lights.
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A buddy of mine calls me the Hillbilly, Rube Goldberg. Not sure if thats a complement.
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I still want to get around to making one of your vacum presses that would be the ultimate form machine , I come from a farming family and my brothers and I every night would go and make gizmos after dinner for entertainment we made every thing from Ham radios to zip guns...lol my wife calls me a hill billy....lol
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My wife says I'm a redneck.
Just because duct tape works:)
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You guys got it good, my wife just calls me a dork.
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I only get called that in the bedroom :biglaugh:
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I think you can get a complete unit that you describe from ( Tex Turner's ) They make several oven tamers that use the pid controllers that you describe staring at $140.00. Curtis is the owner of Cactus Juice Stabilizing fluid.
Check out their website f interested, it is nice to make your own but, they're other options also.
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Flem what is the difference between say a PID unit & Inkbird type controler if your using light bulbs for heat ? Im always up for learning somthing new ?
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The PID would work fine with the light bulbs. The thing is, it's not an on/off switch like a standard temperature controller, so once the box gets up tp temp, the bulbs would constantly be getting varying amounts of amperage, as well as switching on and off occasionally. I don't think they would have much of a life span functioning like that. A better choice would be ceramic IR emitters, for standard sockets. If you did use bulbs, you would have to place a small boom box inside your oven, to go with the cool disco strobe effect from the lights.
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Im really more of a 70s guy shag carpet & quad speakers...lol but sounds like it would work great with heat strips , Pm sent Flem wanted to get your take on a controler and does any body have any thoughts on quality thermal strips (company name) just shoping parts looks like you could put one of these together for a reasonable price ? Sounds like a good inside the house project over winter a lot of trouble makers around this site 😃
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Thanks Flem Im ordering my control head, heat sink & relay ,thermal couple when I get back in town ,I found a small tool box Im going to build mine in ,Im going to wire mine 120v that should give me 3000 watts if my math is right but having a hard time figuring a heat elements ,I need to find the heat strips some where , Flem did you use heat sink grease when attaching your heat sink ?
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Thanks Flem Im ordering my control head, heat sink & relay ,thermal couple when I get back in town ,I found a small tool box Im going to build mine in ,Im going to wire mine 120v that should give me 3000 watts if my math is right but having a hard time figuring a heat elements ,I need to find the heat strips some where , Flem did you use heat sink grease when attaching your heat sink ?
Don’t know how it would work for a heat box but for reptiles I’ve been using flexwatt heat tape for years. Never tested for max output due to only needing 90*F. It’s not sticky backed though. I use foil tape for ducts to stick the edges down. You can get it from The Bean Farm.
https://beanfarm.com/products/flexwatt-heat-tape-11-in?variant=24905297801
Cody.
Sent from my iPhone using Tapatalk
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Thanks Cody I found some ceramic IR emiters for cheap might go that route easy to replace and have spares around and if things should ever go south during cure you could always screw light bulbs in and run manual shift , Flem your thread came up at a perfect time for me as I was planning on building a dedicated hot box instead of my make shift one this winter any how !
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I did not have any thermal paste, so I used some copper anti seize. Figured it would not melt away and the copper should conduct heat
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Thank you sir Im ordering some heat sink gel its cheap , all I need left is to track down a muffin fan I think I have a couple but 12 v DC , I will find a 120v , your projects remind me of the old Heath kit or Lafeyet elec. projects , I think I will try to track down a project box make it look more pro factory look..,,lol
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Thanks for the info on these there cheap and more efficient then incidence bulbs ,your pretty smart for a Hill Billy all parts are on the way :bigsmyl:
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Let us know how much heat you can generate from those please. I have 4-200 watt incandescent now and I can get about 190° which is enough to cure stabilizing resin. It would be great if those could do the same thing.
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Lonnie I will, I got the 200 watt ones I think I'm going to run 3 but I'm only looking for 170 Deg top end !
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Flem got my Lignaphile cruise controller , relay, probe, & heat sink gel still waiting on my muffin fan , and looking for led lights & project box yet. [ You are not allowed to view attachments ] [ You are not allowed to view attachments ]
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Flem I'm getting started on my after work inside projects and got all my components & job box , I decided not to put a Amp meter in the system & opted for a led status light but I have a question for you what's your thoughts on long time use on these ceramic IR heat elements , I'm making two different hot boxes one for bow baking & the other for curing osage riser blocks over a 3 week period adjusting the controller up in presetion increments over that time , do you think these heat elements can take the long duty life or should I look for heat strips for the drying box ? Also even buying the components new I'm still under $100
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I have had good luck using those emitters. I have one in my pump house, connected to one of those cheap plug in thermocubes. Been in there for 5 winters now, no problems. Never had any failure when I was using them in my box, either. I thought about using the heat strips in my box, but they are spendy. You can pick up a used baseboard heater , for next to nothing. Just another option to consider. No mater what heat source you go with, I believe the axial fan helps it's longevity by reducing hot spots.