Behmor

UNM

Take a look at <a href=http://coffeesnobs.com.au/roasters/29974-measuring-temp-behmor.html> this thread </a> There is a picture of the drilling template for the thermocouple placement in that thread. You would probably be best to roast logger, rather than the CS software. More people here seem to use it and it is supported software.

Lacehim

SS, Regarding your Behmor issues have you seen this website? http://www.behmor.com/error5.php and this http://www.behmor.com/error6.php It does give a little info about the errors and the cause, and I hope you don't get an error 1. 😉

Divey

I have done quite a few roasts of many different beans on the Behmor now and I'm rather pleased with the results I'm getting. 🙂 Extremely even roasts. :thumb: I am rather concerned that there is a very short period of time between 1st crack and 2nd crack. It seems to me that the very first crack you hear is immediately followed by rolling 1st crack and then seems to roll straight into 2nd crack. I'm thinking of tilting the machine forward nearing first crack so the beans are further away from the elements in an attempt to keep the beans from heating too quickly. Has anyone tried this :question: I feel that it would be beneficial if you could reverse the rotation of the drum at this critical stage of the roast.

UNM

I don't know the behmor, but would not expect tilting to work as well as you might like. Presumably heat transfer to the beans occurs through drum contact, radiant heat and hot air in the roaster. An extra few centimeters from the radiant heat source is the only difference you will make. Lowering power to the elements is, I suspect, the best way to slow it down. Next best would be to increase airflow in the roaster to lower internal temperature. Please note, this is just an educated guess.

shape_shifter

Divey I know you have tried the open door method, it seems to be the only way to get the extended time between first and second crack. I actually open it to the first place where it supports itself rather than using the brush, sure a little bit of chaff but that's what vacuums are for 🙂

UNM

Surely turning down the heat is the most obvious solution? I had to install full manual control of my heater elements in the hottop because the programmed profile was crap, but if the only issue is with reducing heat as it nears first crack, that is easily accomplished with a pwm control circuit between the existing heat element output wires and the elements themselves. Normally it would be at 100% power, then reduce to a lower value just before first crack, then potentially back to 100% once first crack finished. Benefit if wiring like this is all existing safety features remain in place

lemoo

on the behmor you do not have control over the power for the elements they run set presets and programs

UNM

lemoo wrote:

on the behmor you do not have control over the power for the elements they run set presets and programs

My point is that adding control to limit element power is easy.

Divey

There is a section ( PartV: 8 )) in the Manual that I must of glossed over or failed to read.

Adjusting profiles by time additions and subtractions at proper times can be used to slightly alter the pre-programmed profiles. You can shorten or lengthen the middle leg of a profile or end leg of a profile in terms of percentage to total time. The adjustments can be made prior to or just after starting the roast cycle. Example: P5 is 33% of each power application throughout the entire roast. Thus if your were to set the timer at 6:00 minutes each leg of the profile would last approximately 2:00 minutes. However, if you were to set the timer to 6:00 minutes to begin with, then upon starting a roast, add 2:00 minutes you will have immediately reduced the middle legs total percentage to 25% versus the original 33%. Conversely, let us say you want to lengthen the middle leg and shorten the end leg of the roast. Before starting press the timer to read 10:00 minutes. The system then reads it is to run approximately 3:20 per leg. Once starting however reduce the time to 8:00 minutes and you will have the first legs of the roast at 3:20 each and the final leg at 1:20. If you wish to shorten the roast middle leg percentage to total and lengthen the end leg, reduce the times to start, then once started add the time back. If you wish to lengthen the roast middle leg percentage to total and reduce the the end leg, add time to start and then once started reduce the time back.

I reckon this is the section that the Behmor owners have to get their heads around.

Brett_H

Yep, you got it Divey! I gave up operating like that some time ago because I'll admit i had very little repeatbility and frankly as a home roaster I prefer the KKTO option of lying by the seat of my pants! Just a question RE voltage, what are the buttons again for changing the voltage?

Divey

Brett H wrote:

Yep, you got it Divey! I gave up operating like that some time ago because I'll admit i had very little repeatbility and frankly as a home roaster I prefer the KKTO option of lying by the seat of my pants! Just a question RE voltage, what are the buttons again for changing the voltage?

I'm sure there is enough roasting options and modifications to the roasting options that you must be able to find what suits you using the Behmor. At the moment, I have not used the what I have set out above as I have quite a bit of roasted coffee on hand. One thing I really like about the Behmor is the evenness of the roasts. To answer you question re the voltage, if you power supply is 220 volts hold in the 'A' button on and then switch on the power, for 230 volts hold in the 'B' button and for 240 volts hold in the 'C' button.

Brett_H

Cheers Divey! I too like the evenness of the Behmor. I tend to stick with the 1lb P2 330g for my unit and get great results especially if I use the door cracking trick. I'll have a go at a modified program and get ack to you.

LaSanMarcoMelb

I'm curious of anyone who has been roast logging the behmor. I know that it's not recording bean temp but I would like to see some others roast profiles as the results weren't anything like I expected. I'm just not sure how beneficial it is to put the temp probe into the behmor due to the lack of actual control over the temperature / fans etc. ....... I'm getting that upgraditis tingling feeling again I think

Beanz

I have logged a number of profiles with and without beans in the Behmor and find it very useful for understanding what is going on with the roasts. There is a template floating around on another site that nominated a location for drilling a hole and inserting a probe. There are two benefits of using the template 1 It is in a clear spot with respect of wiring so eliminates any nasty accidents 2 It gives all users a similar reference point for comparing results. As you stated it is not bean temperature and as such you do see some fast reactions when elements go on and off but if you extrapolate you will have a much better understanding of what is going on inside the roaster. The actual bean temp will not move as fast as the temp at the point of measuring which is above the drum. I get very frustrated as I cannot control the profile the way I can with a corretto and have considered pulling it apart and controlling the elements manually using theatre lighting dimmers. I did not use the Behmor for a while but recently went back to it because I needed to do some quick and easy roasts to top up supplies. I was surprised at how good the results were and how repeatable they were so I have been running a number of roasts lately with great results. If you can nominate a specific profile you are interested in I may have a graph I can attach

LaSanMarcoMelb

No denying that the behmor roasts are excellent, I've been knocking out heaps of coffee for the whole family over Xmas to critical acclaim and am really happy with every coffee I've roasted over last 6 months other than 1 charcoal lot. I got the temp probe for xmas (inserted using the template on CS) and probably need to get over the fact that the graph is a bit more mountains than curve. At least I now have a multi meter!!

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