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02/27/2021 9:50 AM
Questions are best asked in the forum. The posts will last longer, and will be seen the most by members. After a few more posts in the Shoutbox, the post you made will no longer be seen.... maybe you could also introduce yourself and share a little.
02/27/2021 9:29 AM
I'm looking to hire someone to teach/help me to find the best roast profile for the 3 types of coffee that grow on my farm in nicaragua. I live in LA, but but could go anywhere in so cal with my Behmor for a roasting lesson. Please contact me if you're in
02/17/2021 7:20 PM
When your wife thinks 30 grams for a 6 cup setting is strong, you learn to drink muddy water when you are making coffee for both of you.
02/17/2021 8:32 AM
I use a rule of thumb of 60 grams per liter. 8 cups (1 liter, 32 oz) = 60 grams, 6 cups (3/4 liter, 24 oz) = 45 grams. 10 cups = 75 grams 12 cups = 90 grams
02/17/2021 1:47 AM
OldMan41, depends what is "a pot"... usually is more accurate to specify the brew ratio, instead grams of coffee. The most usual is 1:15, thus 40 grams for 600 ml of water. If the 100 grams are for one liter pot, then we are talking about 1:10 ratio.
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 Bobby M15's drum
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| btreichel |
Posted on 02/14/2018 5:02 PM
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 1/4 Pounder  Posts: 161 Joined: May 07, 2007 |
:thumbdown-gif hNo Bummer. Sorry to hear that. |
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| BobbyS |
Posted on 02/14/2018 6:18 PM
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 1/4 Pounder Posts: 179 Joined: July 02, 2011 |
Quote  |
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| BobbyS |
Posted on 02/23/2018 2:20 AM
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1/4 Pounder Posts: 179 Joined: July 02, 2011 |
i'll be back....................... soon.... soon as i grow some thumb  |
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| BobbyS |
Posted on 03/06/2018 12:32 AM
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1/4 Pounder Posts: 179 Joined: July 02, 2011 |
Well, since I am working mostly one handed, and left handed at that. I have at least been able to work on the control part of my roaster. Getting some things mocked up and lined out. Thumb is healing slow. |
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| BobbyS |
Posted on 03/25/2018 2:33 AM
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1/4 Pounder Posts: 179 Joined: July 02, 2011 |
Thumb is slowly healing, ordered some more 12" 40 grit discs. cut some steel yesterday, slow going using mostly one hand but, like my doc said, **** happens. I am fortunate. this is only an inconvenience, a little slow up in the work process on the roaster. I'm chomping at the bit, can't wait to "git er done" and fire it up. but the time off from steel working has given me time to work on the control side of it, so, a little harm, no foul lol. |
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| btreichel |
Posted on 03/25/2018 11:29 PM
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1/4 Pounder Posts: 161 Joined: May 07, 2007 |
I have a 4.3? in tft touchscreen for mine now. |
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| BobbyS |
Posted on 03/26/2018 4:12 PM
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1/4 Pounder Posts: 179 Joined: July 02, 2011 |
Quote cool, which one? |
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| btreichel |
Posted on 03/27/2018 12:46 AM
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1/4 Pounder Posts: 161 Joined: May 07, 2007 |
Ops, 3.5. adafruit 2050. Power on one side, fan on the other, timer that marks drop (start), dry, fc, and dump (stop). Plus bt, ror, and any other data I can think of. Probably cheaper ones, but spare from another project. Yeah, lcd with 4 pushbuttons would do the same thing, but... |
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| BobbyS |
Posted on 03/27/2018 1:17 PM
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1/4 Pounder Posts: 179 Joined: July 02, 2011 |
I've got a nifty little PLC that is gonna do the thinking and doing part of mine. I am going to connect up with a laptop and AdvancedHMI along with Artisan. |
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| BobbyS |
Posted on 04/01/2018 6:01 PM
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1/4 Pounder Posts: 179 Joined: July 02, 2011 |
Quote btreichel wrote: Ops, 3.5. adafruit 2050. Power on one side, fan on the other, timer that marks drop (start), dry, fc, and dump (stop). Plus bt, ror, and any other data I can think of. Probably cheaper ones, but spare from another project. Yeah, lcd with 4 pushbuttons would do the same thing, but... wow, that is really inexpensive @ 39.95 if I am looking at the same one |
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| btreichel |
Posted on 04/01/2018 6:07 PM
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1/4 Pounder Posts: 161 Joined: May 07, 2007 |
Really, I figure adafruit stuff goes for a premium because of the known quality, support, and libraties. But I do like there stuff for that reason. Will eventually post pictures of the interface. Heater, up, down, fan also,. Timer function, and 6 * 10 lines left over in the center for data. I'm running spi, so I have 4 analogs left over. They get 2 TC's, a voltage sensor, and a current sensor. |
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| btreichel |
Posted on 04/27/2018 11:43 AM
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1/4 Pounder Posts: 161 Joined: May 07, 2007 |
Ok guys, forget using the TFT I mentioned. I'm using spi to drive it to save pins and it takes 2 ms to write a single character. I discovered this when I wondered why I was getting a 'pulsed' drop out of the heater power. Tried to do a timer 2 interrupt to schedule the triac firings, but that stopped the display from working. My UNO has every pin, but rx, tx used, so I really can't switch things around. Summary, TFT.print takes too long, and taking an interrupt seems to mess with its functionality. |
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| BobbyS |
Posted on 04/27/2018 11:45 PM
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1/4 Pounder Posts: 179 Joined: July 02, 2011 |
thanks! |
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| ThomasCee |
Posted on 05/03/2018 2:20 PM
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 Newbie  Posts: 17 Joined: April 07, 2018 |
Hey man, heal up fast. So sorry for the injury. I am watching and taking lots of notes on the project. Can't wait to see how it finishes up. |
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| BobbyS |
Posted on 05/05/2018 2:34 PM
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1/4 Pounder Posts: 179 Joined: July 02, 2011 |
Quote ThomasCee wrote: Hey man, heal up fast. So sorry for the injury. I am watching and taking lots of notes on the project. Can't wait to see how it finishes up. Thanks! it is starting to get some skin and tissue back and I have been doing some small stuff to the roaster that doesn't take any hard gripping. I think in another week or so it will be a bit better and more mobile. |
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| btreichel |
Posted on 05/07/2018 9:12 PM
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1/4 Pounder Posts: 161 Joined: May 07, 2007 |
I actually got the tft to work without any resource conflict. I have the zero crossing interrupt on pin 2, 3 & 4 are part of the tft pins, 5 & 6 are triac drivers, etc. I'm using timer2 to drive isr's to drive the triac pins, which allows the uno to handle writing to the tft without interfering with the triac timing. 7 & 8 are used for the touchscreen decoding, 9 & 10 are available for servo, or other pwm functions, 11- 13 are tft again. Using timer 2 loses the tone() function, but keeps the millis(), micros() funtions etc. Of course 0 & 1 are serial comm. Edited by btreichel on 05/07/2018 9:26 PM |
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| BobbyS |
Posted on 05/10/2018 11:43 PM
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1/4 Pounder Posts: 179 Joined: July 02, 2011 |
sounds like it's coming along pretty well. sometimes it just takes some tweaking. |
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| KSkip |
Posted on 05/11/2018 1:27 AM
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 Newbie Posts: 4 Joined: May 08, 2018 |
Bobby you're an inspiration. I have been collecting information from around the web to build exactly what you're working on. I may step down in budget and see how much salvaging I can do without having to order too much custom steel. I've got two questions. 1: Where did you source your drum material from? 2: For airflow during roasting are you doing a blower motor or are you just relying on the hot air from the burner to flow through your inlet gate and eventually out your exhaust? Thanks and hope you're healing well! |
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| BobbyS |
Posted on 05/11/2018 1:07 PM
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1/4 Pounder Posts: 179 Joined: July 02, 2011 |
Quote KSkip wrote: Bobby you're an inspiration. I have been collecting information from around the web to build exactly what you're working on. I may step down in budget and see how much salvaging I can do without having to order too much custom steel. I've got two questions. 1: Where did you source your drum material from? 2: For airflow during roasting are you doing a blower motor or are you just relying on the hot air from the burner to flow through your inlet gate and eventually out your exhaust? Thanks and hope you're healing well! hi KSkip, Getting better day by day. Thanks for asking! I used a piece of 8" pipe. Pipe is not very round and even thinner pipe has a fairly thick wall. So I had it turned. If I was doing it again I would go to a good machine shop or fab shop and have them roll me one the correct thickness to start with. As slow as a drum turns pipe might be fine without turning. It would take some trial and error to try and get it centered as good as possible but might be doable. I am going to pull air through the drum so it can be controlled. Good luck on your build. Pics or it didn't happen.  |
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| BobbyS |
Posted on 07/18/2018 6:32 PM
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1/4 Pounder Posts: 179 Joined: July 02, 2011 |
OK, thumb is doing better where I can actually work on this some more, albeit slower lol. Fabricated the inner heat shield and got it mounted. Also got the blower for the drum air installed. The blue connector is a silicone sleeve that car folks use on turbos and is good to 500*F.  Installed the view glass on the door and installed thermocouple ports. Also finished the bean chute.  I used some perf plate under the burners to keep pests out and to also cut down on inlet air. 
Edited by BobbyS on 07/21/2018 1:16 AM |
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