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Thread: 500 gram gas powered sample roaster / home roaster

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    500 gram gas powered sample roaster / home roaster

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    There has been much debate about a suitable home roaster.
    Capacity, heating source, cost, etc....
    I think I have found a solution, and would like some feedback.
    Japanese Made, Gas fired 500g capacity drum roaster. Designed for sample roasting, but equally suited to home roasting. (Imagine a tiny cement mixer looking unit with burner mounted below the drum). It pivots to discharge the roasted beans into the cooler
    separate cooling tray with fan.
    I found this beauty, literally as I was heading out to the Airport on my way home.
    About $2k aussie, after all the conversions, freight, etc..... is it worth it ?

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    Re: 500 gram gas powered sample roaster / home roa

    coffee_mogul,

    The information provided is a bit sketchy - for example there doesnt appear to be any controls provided (is that correct?).... do you just turn the gas up and down - if so thats rather crude.... in fact looking at the photos it looks far more agricultural than either the Gene or HT roasters..... and for that price you can purchase almost 3 Genes and about 2 HT roasters..... both of which will do 300grams and have a lot more control over the roast.....

    Without more details its hard to say..... but it doesnt appear to be value for money to me!

  3. #3
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    Re: 500 gram gas powered sample roaster / home roa

    They do come in a range of colours though.
    Choice would be impressed.

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    Re: 500 gram gas powered sample roaster / home roa

    Thanks for the feedback. More than happy to elaborate.

    This unit has manual gas burner control with an atmospheric burner. Sure you can get a gene or hot top, but they are both electric and contain substantial amounts of plastic in their construction.
    This appealed to me for the following reasons.

    1. robust and simple, very little to break or go wrong
    2. Gas Burner, offers quicker heat control
    3. Manual control, I want to control the profile based on the origin.
    4. easy to dump the beans.
    5. conventional drum roaster



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    Re: 500 gram gas powered sample roaster / home roa

    I forgot to add, $3000 cheaper than a Diedrich HR-1




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    Re: 500 gram gas powered sample roaster / home roa

    Quote Originally Posted by coffee_mogul link=1213273136/0#4 date=1213277451
    I forgot to add, $3000 cheaper than a Diedrich HR-1

    Yep...... but I dont think the two are comparable - by a long shot!! The Diedrich has a long history of being a great coffee roaster..... and has well and truly proven itself. Id suggest the Japanese have as much experience with making roasters and roasting beans as I do making sake ::)

    If you like it.... and it does what you want - then you pay the asking price and be happy with your purchase..... and dont worry what others think!

    In my view it isnt worth it..... it doesnt appear to have a solid, heavy weight drum like real drum roasters..... and I would imagine controlling the profile by manually adjusting the gas is going to be very difficult.... but clearly possible.

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    Re: 500 gram gas powered sample roaster / home roa

    Japan has a long standing history with coffee and roasting it. Trust me its every where.
    I am well versed on all things Diedrich I have previously owned an IR3, and now have an IR7
    The company manufacturing this make commercial roasting *equipment including *large capacity (100s of kgs) roasting plants. Tis is their sample roaster

    Why would controlling the roast *profile by gas be difficult ? All commercial roasters use heat adjustment to control the roast.
    This is purely a toy for me, by the way. I just wanted to gauge feedback, as there is always a debate about the perfect home roaster. I guess to understand the unit you have to see one. The pictures do it no favours.
    Im not a fan of the gene or hot top, Too prosumer for me.

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    CoffeeSnobs Owner Andy's Avatar
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    Re: 500 gram gas powered sample roaster / home roa


    Really 500g?
    Looks too small to me but maybe I have the scale wrong?!?!

    Interesting though.

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    Re: 500 gram gas powered sample roaster / home roa

    Yep,

    I agree... Does look interesting. What powers the Drum rotation c_m, doesnt seem to be anything obvious?

    Mal.

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    Re: 500 gram gas powered sample roaster / home roa

    electric motor rotates the drum

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    Super Moderator Javaphile's Avatar
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    Re: 500 gram gas powered sample roaster / home roa

    From what is visible in the pictures there doesnt appear to be any air flow through the drum. This will result in a very smoky flavored roast. Your beans will tend to have a lot of roast flavor to them which can be a problem for beans with subtle or fine nuances in flavors.

    Dont forget to take into consideration the venting system youll need for it to get rid of the combustion gases and bean smoke.


    Java "Roasts with manual gas" phile

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    Re: 500 gram gas powered sample roaster / home roa

    Quote Originally Posted by coffee_mogul link=1213273136/0#9 date=1213306262
    electric motor rotates the drum
    Japanese mains supply is 100V at either 50 or 60 Hz (depends where in Japan!)....

    So you will need a step down transformer.... and if designed for 60 Hz and the roaster uses a synchronous motor (quite likely) then the drum will only rotate at 5/6th the speed.... which shouldnt cause a problem.....

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    Re: 500 gram gas powered sample roaster / home roa


    Looks very interesting. Id love to her feedback if you end up getting one. Theres not too much to see from the pictures though. If it works well, then it just might fill the gap between the hottop/gene type roasters and the larger 1kg+ shop roasters.

    Thanks for posting this.

    Cheers,

    Mark.

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    Re: 500 gram gas powered sample roaster / home roa

    2 grand is just a bit too much for me, (well a lot really) personally I think I would get greater satisfaction out of building something like it myself as well as being more affordable.

    I dont think I like the external heat source either, I cant see how the internal drum temperature would be even throughout the whole drum, varieing ambient temperature including ventilation for the smoke could present itself a problem.

    Ray

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    Re: 500 gram gas powered sample roaster / home roa

    Great find *:)

    I think that one of these would be a great size for home roasting.
    $2k is good value for a commercial style gas powered roaster at that capacity.

    On a side note, how is this roaster different to the Probat / Gothot sample roasters that are used by roasteries all over the place?
    Looks the same to me, at first glance.




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    Re: 500 gram gas powered sample roaster / home roa

    Ahh, now I know where ive seen one of these before! When I was in LA, looking out to Alcatraz island through one of the pre-paid binoculars!.. ok maybe not, but they do look like them huh.

    I dont know much about roasters (yet) but they seem fairly basic in construction... seems like theres something missing. Whats the deal with temp control and monitoring? Is there any, besides the manual burner control? Id be good if there was more comprehensive info on it. 2G seems a bit much for it, just looking at the pics. Interesting though.

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    Re: 500 gram gas powered sample roaster / home roa

    Quote Originally Posted by aedion link=1213273136/0#14 date=1213315915
    On a side note, how is this roaster different to the Probat / Gothot sample roasters that are used by roasteries all over the place?
    Looks the same to me, at first glance.
    There is nothing inherently wrong with manually controlling the flame height in a roaster. People have been doing it that way for generations. While details of course vary between models, most roasters use this same basic design of a gas flame heating a rotating drum. While how the flame height/heat level is controlled can vary from being electronically set by temperature too full manual control, in the hands of someone who knows their equipment the end result is the same. Using manual control just takes a bit of a steeper learning curve compared to using a roaster set electronically by temperature.

    Most sample roasters use this same basic design. Some have perforated drums while others utilize a solid drum. Most lower end units provide no control over the air flow through the drum while the higher end units will give you the same full air flow control as the larger commercial machines.

    Instead of worrying about a non-issue like the roaster using a manually controlled gas flame Id be more concerned over its apparent lack of air flow and the effect that will have on the roast.


    Java "Happily roasting with manual gas control for many years" phile

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    Re: 500 gram gas powered sample roaster / home roa

    Behmor Coffee Roaster
    Quote Originally Posted by Javaphile link=1213273136/15#16 date=1213386377

    Most sample roasters use this same basic design. Some have perforated drums while others utilize a solid drum. Most lower end units provide no control over the air flow through the drum while the higher end units will give you the same full air flow control as the larger commercial machines.

    Instead of worrying about a non-issue like the roaster using a manually controlled gas flame Id be more concerned over its apparent lack of air flow and the effect that will have on the roast.


    Java "Happily roasting with manual gas control for many years" phile

    As Dennis posted when he provided the exact commercial profiles he used...... the data on airflow and changes to that airflow during the roast werent posted...... and these will have a significant effect on the end result.

    With my modified HT I can follow his temperature profile - exactly...... and whilst I have some control on the airflow (variable speed built in fan) this is nowhere near as great as the level of control in his roaster...... so Ill never be able to produce the fantastic range of subtle flavours he can get out of a given bean...... (and my experience/expertise is lacking as well ::))



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