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Homeroasters - Home Roasting Coffee Community » BUILDING A ROASTER » Turbo Oven Roasters

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Is the NuWave pro a no go?
starbuxed	#1 Posted on 09/10/2018 5:42 AM
Newbie Posts: 5 Joined: September 10, 2018	So I am new to roasting and building a roaster. But I got a few items from goodwill. 1. A presto 1440 watt air popper, which will be my first roaster. 2. stir crazy 2 3. nuwave pro oven. only goes to 350F But my question covers the stir crazy and the nuwave. Is the Nuwave just junk for roasting? I might be able to alter the Termister by adding a resistor in series to make it think the temp is lower than it is. or move it to a cooler part. Of course I am not dumb getting up to 500f could be dangerous. Will the Oven work at 360f? Anyone have any suggestions or advice?


renatoa	#2 Posted on 09/10/2018 7:07 AM
Administrator Posts: 3005 Joined: September 30, 2016	Not junk, but not appropriate for coffee roasting. 360F is lower even than FC temperature... I have fellows who tried an oven lid fitted by an unhackable electronic thermostat, thus limited to 230C (445F), and the results were not been satisfactory. You need at least 250C (480F), to have a comfortable margin to approach all beans types.


8675309	#3 Posted on 09/10/2018 9:09 AM
1/4 Pounder Posts: 98 Joined: August 02, 2018	I too am real new to this and have been roasting with success ( and failure ) on a Lump-Coal Kamado Grill using a remote temp control device to monitor grill heat. I've done about 10 cooks and am convinced that roasting your own is the way to go. I bought a thick stainless cookie sheet from WMart and drilled a hole into one of the ends and attached a metal skewer to it for agitation and cook away on that. I'd upload a picture of it but I can't seem to figure out why this won't upload an image. I made an executive decision to pick up the Fresh Roast SR500. It's reasonably priced, does not require or depend on fancy software to run the thing, and should produce steady consistent results. If I were not so cheap I'd pick up the GENE CAFE roaster - it looks pretty darn sweet... nice footprint, cool design, etc.


renatoa	#4 Posted on 09/10/2018 10:45 AM
Administrator Posts: 3005 Joined: September 30, 2016	Grill is a different beast, the heat is majoritar radiant (infrared) and can't be measured directly with a thermometer. A hot air oven is majoritar convection, and some radiation component.


Ozo	#5 Posted on 09/10/2018 10:49 AM
1/4 Pounder Posts: 93 Joined: August 08, 2018	Quote 8675309 wrote: I too am real new to this and have been roasting with success ( and failure ) on a Lump-Coal Kamado Grill using a remote temp control device to monitor grill heat. I've done about 10 cooks and am convinced that roasting your own is the way to go. I bought a thick stainless cookie sheet from WMart and drilled a hole into one of the ends and attached a metal skewer to it for agitation and cook away on that. I'd upload a picture of it but I can't seem to figure out why this won't upload an image. I made an executive decision to pick up the Fresh Roast SR500. It's reasonably priced, does not require or depend on fancy software to run the thing, and should produce steady consistent results. If I were not so cheap I'd pick up the GENE CAFE roaster - it looks pretty darn sweet... nice footprint, cool design, etc. To post pictures, I would advise that you use a photo host. I prefer Imgur.com as no account is required and it works easily. To post a photo to the forum I do the following: Open Imgur.com https://imgur.com At the top select New Post Then select Browse Pick the photo from your computer files and select Open Now, once the green activity bar finishes, right click the up loaded photo and pick Copy Image Address Then right click the area in your post to place the photo and select Paste Highlight that and finish by clicking the rectangular icon below the post text box, 7th from left To make links "clickable" as I did above, simply highlight it and click the 5th icon from the left. Edited by Ozo on 09/10/2018 2:56 PM Tim "Espresso is a miracle of chemistry in a cup." Andrea Illy


8675309	#6 Posted on 09/10/2018 12:24 PM
1/4 Pounder Posts: 98 Joined: August 02, 2018	Oh cool and excellent: https://imgur.com... Edited by JackH on 09/10/2018 2:30 PM


starbuxed	#7 Posted on 09/10/2018 1:34 PM
Newbie Posts: 5 Joined: September 10, 2018	Quote renatoa wrote: Not junk, but not appropriate for coffee roasting. 360F is lower even than FC temperature... I have fellows who tried an oven lid fitted by an unhackable electronic thermostat, thus limited to 230C (445F), and the results were not been satisfactory. You need at least 250C (480F), to have a comfortable margin to approach all beans types. Well it has an ntc thermistor. So it would only take adding in a 10 ohm to 100ohm resistors in series to bump up the temp, AKA its pretty stupid and can be tricked. It would be a matter of figuring the wanted total resistance need by of taking At a few different temps the resistance Its a nonlinear curve.


renatoa	#8 Posted on 09/10/2018 2:44 PM
Administrator Posts: 3005 Joined: September 30, 2016	NTC sensors are typically used in a range up to 200?C.


starbuxed	#9 Posted on 09/13/2018 7:22 PM
Newbie Posts: 5 Joined: September 10, 2018	Quote renatoa wrote: NTC sensors are typically used in a range up to 200?C. Which true. I only need to relocate the sensor to a cooler area. maybe shield some the heat so that the heating element cuts off around 500. Maybe do a PWM set up like the popcorn roasters being its about a 1500 watt element. It should be fine to go up another 150f. or maybe I will find a turbo oven before I am ready to build my stir crazy set up.

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