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 Bobby M15's drum
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| BobbyS |
Posted on 05/12/2019 12:28 AM
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 1/4 Pounder  Posts: 179 Location: Joined: July 02, 2011 |
Quote Thank You! It's a lot of fun to do one! |
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| homeroaster |
Posted on 05/12/2019 8:31 AM
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 Newbie  Posts: 28 Location: Southern Indiana Joined: November 02, 2007 |
Quote BobbyS wrote: Interesting thing I found out about heat in my drum roaster. I have perforated steel as the back of the drum and pull air through in the normal way with a blower. What I stumbled onto today while preheating for roasting is drum RPM vs temp. On my roaster, drum RPM controls heat through the drum to a certain amount. I am thinking at a higher RPM the holes in the perf steel on the back of the drum become more "open looking" to the heated air going through than when slower. As the drum ET goes up, to a certain temp, the temp will level off and I can speed the drum up a bit and the heat will then again rise until it levels off. I find it interesting that I can keep increasing drum RPM and increase heat inside the drum as well at the same gas setting. My roaster is much less sophisticated, but when I went from a 32 RPM Motor to a 59, the Roasting time decreased. I just assumed I was adding more energy in the form of agitation, which aided in the process of heat transfer. *********************
Ed Needham "to absurdity and beyond!" http://www.homero... http://www.facebo...EdNeedham1 ********************* |
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| BobbyS |
Posted on 05/12/2019 4:49 PM
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1/4 Pounder Posts: 179 Location: Joined: July 02, 2011 |
Quote homeroaster wrote: Quote BobbyS wrote: Interesting thing I found out about heat in my drum roaster. I have perforated steel as the back of the drum and pull air through in the normal way with a blower. What I stumbled onto today while preheating for roasting is drum RPM vs temp. On my roaster, drum RPM controls heat through the drum to a certain amount. I am thinking at a higher RPM the holes in the perf steel on the back of the drum become more "open looking" to the heated air going through than when slower. As the drum ET goes up, to a certain temp, the temp will level off and I can speed the drum up a bit and the heat will then again rise until it levels off. I find it interesting that I can keep increasing drum RPM and increase heat inside the drum as well at the same gas setting. My roaster is much less sophisticated, but when I went from a 32 RPM Motor to a 59, the Roasting time decreased. I just assumed I was adding more energy in the form of agitation, which aided in the process of heat transfer. I think what may happen: speeding up the drum keeps beans in the air a bit longer which in turn gives them more convection heat. Each roasting machine is probably different in the ratio of convection to conduction heat due to design. Roasting beans is a very interesting endeavor. Edited by BobbyS on 05/12/2019 4:54 PM |
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| BobbyS |
Posted on 05/18/2019 6:11 PM
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1/4 Pounder Posts: 179 Location: Joined: July 02, 2011 |
Here are some consolidated photos of my bean roaster under construction. I am putting this up so folks do not have to go back to square one (post 1) if they want to see some photos. https://imgur.com... |
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| homeroaster |
Posted on 05/18/2019 7:11 PM
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Newbie Posts: 28 Location: Southern Indiana Joined: November 02, 2007 |
The more I see, the more awesomer it gets!
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Ed Needham "to absurdity and beyond!" http://www.homero... http://www.facebo...EdNeedham1 ********************* |
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| BobbyS |
Posted on 05/18/2019 8:21 PM
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1/4 Pounder Posts: 179 Location: Joined: July 02, 2011 |
Thanks !! |
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| allenb |
Posted on 05/19/2019 8:10 AM
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 Administrator  Posts: 3384 Location: Longmont, Colorado Joined: February 23, 2010 |
Very nice indeed! Looking forward to seeing a video showing beans tumbling out into the cooling tray.
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
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| BobbyS |
Posted on 05/19/2019 7:56 PM
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1/4 Pounder Posts: 179 Location: Joined: July 02, 2011 |
Quote allenb wrote: Very nice indeed! Looking forward to seeing a video showing beans tumbling out into the cooling tray. Thanks Allen! Do we post a video the same as a photo? I wasn't sure if we could post videos. |
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| allenb |
Posted on 05/22/2019 6:46 PM
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Administrator Posts: 3384 Location: Longmont, Colorado Joined: February 23, 2010 |
Here you go VIDEO'S: You tube videos in my post: Find the URL for the YouTube video you wish to embed. Find the ID of that video (whatever is after the v= in the URL. Let's say the ID is vr3x_RRJdd4 (which is the ID of a video for the Free Hugs Campaign) Then you would enter the following into your post to embed the video: PHP Code: Please note that some browsers (Android) do not support Flash player and the video will not be seen with the [youtube] tag. Use the [video] tag instead with the full address of the video: [video]http://www.youtube.comvr3x_RRJdd4[/video] 1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
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| BobbyS |
Posted on 05/22/2019 8:22 PM
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1/4 Pounder Posts: 179 Location: Joined: July 02, 2011 |
Thank you sir! |
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| BobbyS |
Posted on 07/23/2019 7:56 PM
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1/4 Pounder Posts: 179 Location: Joined: July 02, 2011 |
I found out the hard way (as usual) not to wear flip flops when roasting. A hot bean flew out of the drum when I dumped and landed in between two of my toes. 400+F bean is really hot......  |
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| NewBean |
Posted on 07/23/2019 9:08 PM
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 1/4 Pounder Posts: 54 Location: Joined: May 31, 2019 |
OMG lol same thing happen to us the other day but not that hot ! LOL safety shoes required  Quote BobbyS wrote: I found out the hard way (as usual) not to wear flip flops when roasting. A hot bean flew out of the drum when I dumped and landed in between two of my toes. 400+F bean is really hot...... |
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| BobbyS |
Posted on 07/24/2019 5:39 PM
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1/4 Pounder Posts: 179 Location: Joined: July 02, 2011 |
Quote NewBean wrote: OMG lol same thing happen to us the other day but not that hot ! LOL safety shoes required Quote BobbyS wrote: I found out the hard way (as usual) not to wear flip flops when roasting. A hot bean flew out of the drum when I dumped and landed in between two of my toes. 400+F bean is really hot...... or any type of shoe..............lol |
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| NEcoffeesnob |
Posted on 01/14/2020 2:49 PM
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Newbie Posts: 1 Location: Joined: January 14, 2020 |
This is an amazing build and I'm extremely jealous! I don't know if you're still monitoring this thread or not, but I looked through this entire thread and wasn't able to find your budget and final cost for manufacturing this roaster. Do you have those numbers and if so, would you mind sharing? Thank you! Tim |
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| BobbyS |
Posted on 01/15/2020 1:56 AM
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1/4 Pounder Posts: 179 Location: Joined: July 02, 2011 |
Quote NEcoffeesnob wrote: This is an amazing build and I'm extremely jealous! I don't know if you're still monitoring this thread or not, but I looked through this entire thread and wasn't able to find your budget and final cost for manufacturing this roaster. Do you have those numbers and if so, would you mind sharing? Thank you! Tim Yes, I am here. I have no numbers on the cost as it was getting a part here and another there. I CAN tell you it cost me about $ 550.00 out of my pocket when I cut the end off of part of my right thumb lol. |
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| kwrcst |
Posted on 01/27/2020 11:34 AM
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 1/4 Pounder Posts: 75 Location: Joined: November 26, 2018 |
Bobby, where did you get the stock pot for the cooling tray? |
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| BobbyS |
Posted on 02/15/2020 6:21 PM
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1/4 Pounder Posts: 179 Location: Joined: July 02, 2011 |
It was from an online restaurant supply in which the name escapes me. Most things escape me about 2 min. after I know it, or think I know it! lol |
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| renatoa |
Posted on 02/16/2020 4:43 AM
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Administrator Posts: 1749 Location: Europe Joined: September 30, 2016 |
Looks like a SS ice bucket... or similar. If 5 liters, that can cool up to 1 kg of roast, is good for you. then I suggest the 5 qt ikea 30152346 steamer insert. Check this video to see it in action with one pound of roasts. https://youtu.be/... |
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| BobbyS |
Posted on 02/17/2020 7:11 PM
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1/4 Pounder Posts: 179 Location: Joined: July 02, 2011 |
I probably got it off of eBay. It is 30 quart aluminum, 6mm thick wall and bottom. |
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| BobbyS |
Posted on 03/30/2020 3:01 PM
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1/4 Pounder Posts: 179 Location: Joined: July 02, 2011 |
I built my roaster as a 2k roaster. I finally charged it with 2k of Taz and it worked just like it should. So now I am a happy camper! Edit: I waited until I had a couple hundred pounds of roasting under my belt and I am glad I did. Learned a lot in the early roasts, but if you do your homework and kind of develop good guessing skillz to stay just a little bit ahead of the game it makes it easier lol. Edited by BobbyS on 03/30/2020 10:56 PM |
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