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Thread: HX cycle time ..... is ?

  1. #1
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    HX cycle time ..... is ?

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Im looking a getting a HX machine possibly a BFC junior , or *a VBM Super lever*or similar and I noticed a friend had a BFC *and it was turning on and off every 40-50 seconds with a loud dull clunky click every time.

    Is this the norm for these machines...? Can they be fiddled with to go longer between cycles.
    I found it a little annoying.

    cheers

  2. #2
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    Re: HX cycle time ..... is ?

    Hi there, youre friends machine may have had a sirai pressurestat.Theyre a very good quality commercial pressurestat, but can be a little noisy.Ive had a machine with one in the past and every time it clicked i kept thinking something had broken! Only a problem till you get used to it.Most home machines will come with a quieter mater or jaeger pressurestat which are a lot quieter, but not quite as good quality.Some do have an adjustable cycle time or deadband, but i doubt youd want to change it as these pressurestats are alot quiter than the sirai.
    The Vibiemme super has another type of pressurestat, a parker i believe.I have no experience with these, but they are a commercial pressurestat, so may be similar to the sirai.Your best option is to try before you buy.

  3. #3
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    Re: HX cycle time ..... is ?

    The cycle time on my VBM is about 2 minutes, with about a 10-15 second heating time. The pressuresatat is loud - a sign of nice big electrical contacts! - but you get used to it.

    The only ways to increase the cycle time would be to fit a worse (wider range) pressurestat, or to lower the boiler temperature. Neither would be beneficial to good coffee...

    Of course, if you could rig up a PID controller and a solid state relay, you could get rid of the clicking...

  4. #4
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    Re: HX cycle time ..... is ?

    Thanks for the info ...... looks like I might buy it, the BFC Junior semi-auto , got it at home now sorting it out ...... 16 months old, appears to be a big solid jigger.

    Running too hot , with too much boiler pressure. But I do like the look and feel of it.


    Cheers

  5. #5
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    Re: HX cycle time ..... is ?

    well Ive had this thing for a month now and it performs very well. I still wish the p/stat was a bit quieter.... I have lowered the guage pressure to 1.1 (and a tad) and it is cycling 50 sec off / 6 sec on.

    From what I can gather this would appear to be an expected norm for these machines...... ( could a fellow Diademia /BFC junior owner confirm)

    Cheers
    hotshod

  6. #6
    Mal Dimal's Avatar
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    Re: HX cycle time ..... is ?

    Yep,

    Thats pretty close to spot-on mate.... [smiley=thumbsup.gif]

    Mal.

  7. #7
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    Re: HX cycle time ..... is ?

    Quote Originally Posted by 3B3C27203B3C37530 link=1253021027/4#4 date=1255853086
    I have lowered the gauge pressure to 1.1
    Hi hotshod,

    Ive the same machine... and mine is running at 1.2 bar. How many turn of the presurestat (presumably to the "-" direction) did it take to reduce down to 1.1 bar? I read some where it was about 6 half turns?

    Regards
    Merr1

  8. #8
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    Re: HX cycle time ..... is ?

    Merr1 .....

    The screw adjustment from 1.2 to 1.1 was approx 1/4 to 1/3 rd of a turn in an anti-clockwise direction...... adjustment was done after it had thoroughly warmed up and poured some shots ..... 90+ min
    It is very easy to fine tune.

    Cheers
    Greg
    (hotshod)




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