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Thread: super jolly potentially not pulling it's weight

  1. #1
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    super jolly potentially not pulling it's weight

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi guys, so after taking my Silvia to a friend's place today (who's a coffee repairer) to check the pressure of the group because I felt like I have'nt been getting the best out of my machine and thought this might be the problem. After measuring the pressure at the group, it was bang on 9bar, so we pulled some shots to check the extraction with my bottomless handle and it poured so much better and longer before it blonded compared to when I use the Silvia at home, it also tasted much better and cleaner (the beans he used are what I usually use). The only difference was using his Macap m4 doser and he has better water filtration (I'm currently borrowing an Aquapro countertop water filter). My question is, would my second hand super jolly with 4month old burrs be the problem? Or would it be my water and the grinder together? What he thought might have been wrong with my super jolly is the capacitor might not be working correctly, Any thoughts?

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    Member 260zman's Avatar
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    I can't even begin to imagine how a dodgy capacitor could affect the grind of your coffee? Only 2 or 3 things out will be the cause (ruling out the burrs as 4 months home use is pretty much brand new, unless fitted incorrectly). Your grind setup, stale beans or a dirty grinder.
    Also, if you think it's your water, bottle some of his water (after filtration) and take it home and use it with your grinder/beans.
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    Senior Member Barry O'Speedwagon's Avatar
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    Quote Originally Posted by 260zman View Post
    I can't even begin to imagine how a dodgy capacitor could affect the grind of your coffee?
    In sufficient torque at start I guess? I'm no engineer though.

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    Quote Originally Posted by 260zman View Post
    I can't even begin to imagine how a dodgy capacitor could affect the grind of your coffee? Only 2 or 3 things out will be the cause (ruling out the burrs as 4 months home use is pretty much brand new, unless fitted incorrectly). Your grind setup, stale beans or a dirty grinder.
    Also, if you think it's your water, bottle some of his water (after filtration) and take it home and use it with your grinder/beans.
    He said if the capacitor isn't working properly then the grinder won't start at the correct speed, apparently it creates a slight wind up to get to speed, but I haven't noticed this while operating the grinder (if it's even possible to notice). The burrs are probably more so 6-7months old now that I think about it, and I go through 1kg of beans each 2-3 weeks so that's a minimum of 6-7kg of beans. I don't use stale beans, they are at oldest 7-10 days post roast. I also clean the grinder 4 weeks at a time.

    I'll try bottling some of his water when I get the chance, but that shouldn't affect the extraction that much could it? especially since I am filtering my water too.

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    I seriously doubt anything is wrong with your SJ....
    If it starts up with beans in the hopper and grinds 'em, then there's nothing wrong with the Start/Run Capacitor. If the Capacitor was faulty, it wouldn't start under load and maybe not even without a load.

    Regarding your current water filtration system, when did you last do a test on the Total Dissolved Solids to ensure it is doing the job properly? What is the origin of the unfiltered water supply? Tank, town....

    Sounds more like it's either a coffee quality issue or a technique issue. How old are the beans you're using? (even though they're the same as your mate's). Did you pull the shots at your mate's place, or did he? If he did, then maybe some pointers from him to help you out with potential technique issues...

    Mal.

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    Quote Originally Posted by Dimal View Post
    I seriously doubt anything is wrong with your SJ....
    If it starts up with beans in the hopper and grinds 'em, then there's nothing wrong with the Start/Run Capacitor. If the Capacitor was faulty, it wouldn't start under load and maybe not even without a load.

    Regarding your current water filtration system, when did you last do a test on the Total Dissolved Solids to ensure it is doing the job properly? What is the origin of the unfiltered water supply? Tank, town....

    Sounds more like it's either a coffee quality issue or a technique issue. How old are the beans you're using? (even though they're the same as your mate's). Did you pull the shots at your mate's place, or did he? If he did, then maybe some pointers from him to help you out with potential technique issues...

    Mal.
    I haven't done a total dissolved solids test as this is the first time I have heard of one. The water supply is from town in Mt Coolum, Sunshine Coast, I was told it's decent for town water.

    The current beans I am using were roasted 2/6/15 (these are blend P2 from talk coffee), even when I get the other beans that my friend uses they don't extract like what I saw today (whether they're 1 week post roast or 1month). I pulled the shots at his house, which was a big reassurance for me as I thought I have been doing something wrong all this time.

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    Quote Originally Posted by 260zman View Post
    I can't even begin to imagine how a dodgy capacitor could affect the grind of your coffee? Only 2 or 3 things out will be the cause (ruling out the burrs as 4 months home use is pretty much brand new, unless fitted incorrectly). Your grind setup, stale beans or a dirty grinder.
    Also, if you think it's your water, bottle some of his water (after filtration) and take it home and use it with your grinder/beans.
    I agree with this.
    Doubtful it's the capacitor and I even doubt the water is having as big an effect as you describe.

    But it could be the burrs are either incorrectly fitted or the burr carrier is not level - so you get an uneven grind/wide particle size ratio that would then produce the uneven pours.
    They are OEM original burrs right?
    Who did the fitting?
    Can you get someone to check the alignment of the burrs for you?
    260zman likes this.

  8. #8
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    1. Silva is okay
    2. That leaves the grinder.
    The burrs are 4 months old. It took my New Kony many months before the burrs were run in.
    It may simply be that the burrs still have rough machine edges that in a commercial situation run in in a few week. I am guessing the SJ is semi commercial.
    I have a Rocky that I have never been happy with. About 6 months ago I got it along side the Kony and worked on matching the grind. Rocky is now embarrassingly good. It was way out of correct adjustment. It is now at work producing really sweet flat whites!
    It might be useful to take the grinder to your friend and try to work on matching the grind.
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    They are genuine burrs that I fit, they didn't look uneven when fitted but I can always get my mate to check it.

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    Quote Originally Posted by dumiya View Post
    I have a Rocky that I have never been happy with. About 6 months ago I got it along side the Kony and worked on matching the grind. Rocky is now embarrassingly good. It was way out of correct adjustment.
    Care to explain exactly what you did ?
    what do you mean by.. "Matching the grind" ?

  11. #11
    Member 260zman's Avatar
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    Yep definitely check burrs, all it takes is a bit of grinds between the burr and burr carrier when you fit it and it will be out. Then get some beans to "waste" and pour a whole lot of shots adjusting the grinder until it's mint.

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    Sounds silly. Here goes: the Kony having worn in is grinding perfectly all grinds the same size, no clumping- burrs run in. Measure by weight 18gms the Kony dose (modified Kony grinds only what I put in to it). Check taste through my Rocket nice and sweet. Extraction was 55ml in 30 seconds. Then using the Rocket as the espresso, adjusted the Rocky until I was getting the same weight of grinds extraction rate of 55ml in 30 seconds. This took some time. I noticed that the grind number on the Rocky was quite a bit different to what I thought was correct. The tamping was the same for both extractions.
    Note: use same espresso for the control grinder and the testing grinder.
    Note: for home use the burrs make take some time to wear in. Until there wear in (or realigned) they will not be able to grind the beans evenly. This often created clumping and poor taste.

  13. #13
    Senior Member Barry O'Speedwagon's Avatar
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    Call me Mr Thicky, but why not dial in a grinder the 'normal'* way. Find a sensible dose, set the grind so that you just almost choke the machine, then back off a little? Brew some coffee, observe when it is blonding, taste it and go from there? I guess I get the idea of having a taste standard, but the rest seems a bit avant garde for me

    *Speedwagon
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    I doubt there is anything wrong with the grinder. I'd try Barry's suggestion for dialling it in.



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