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Thread: Macap M4 adjustment after replacing burrs

  1. #1
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    Macap M4 adjustment after replacing burrs

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi all
    I have an old Macap M4 with a dosing chamber that saw a tiny pebble go through the grinder a couple of weeks back. I noticed that I needed to grind a little bit coarser than normal to make my espresso, and concluded there may have been some damage to the burrs.
    Have opened and removed the burrs and cleaned them. No obvious damage,but I went ahead and ordered new top and bottom burrs from a supplier here in Sydney .
    i asked the gentleman who sold me the burrs how to adjust the grinder after installing the burrs, and was told he was "not qualified" to tell me. When asked if he did not know how to adjust the machine, he responded "I did not say that". I suppose they want to sell me a new grinder. Who knows.

    In any case, can someone on CS tell me how to adjust the grinder after installing new burrs.
    I think I need to reverse thread(anticlockwise) the collar till it is hand tight, then loosen slightly(clockwise turn) so the burrs are not touching. From there , turn clockwise 1.5 numbers to zero. Espresso grind is a further 1.5 numbers or so coarser. French press is probably 3 numbers coarser from zero. All this done without the machine running. Is this about right??
    Thanks

  2. #2
    Life-long Learner DesigningByCoffee's Avatar
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    Hey deco
    From memory, when I replaced my burrs or cleaned them on my M4, I used to do the following…

    • Pull the cap off the micro adjuster knob, undo the screw then flip back the 'flip-top-head' so you can unscrew the burr carrier.
    • Clean / change burrs etc. (to help centre the burrs, I remember using 3 toothpicks around the edge to centre the new burrs before screwing them in place - there was some play in the countersunk holes)
    • Hand wind the burr carrier until the burrs touch
    • Replace the fliptop head. Then wind this anticlockwise (I think!) 15-16 full turns to return the grind to the espresso range. The plastic number ring is a guide only - it always ended up in different spots!

    I used to do that 2-3 times a year for cleaning - worked pretty consistently

    All the best
    Matt

  3. #3
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    Thanks Matt
    15-16 turns with this unit have the burr carrier off the base again.
    i think it needs to be wound CC, then slightly clockwise, then a bit more clockwise till the grind feels right. Will have to keep trying.
    Thanks
    Rob
    Quote Originally Posted by DesigningByCoffee View Post
    Hey deco
    From memory, when I replaced my burrs or cleaned them on my M4, I used to do the following…

    • Pull the cap off the micro adjuster knob, undo the screw then flip back the 'flip-top-head' so you can unscrew the burr carrier.
    • Clean / change burrs etc. (to help centre the burrs, I remember using 3 toothpicks around the edge to centre the new burrs before screwing them in place - there was some play in the countersunk holes)
    • Hand wind the burr carrier until the burrs touch
    • Replace the fliptop head. Then wind this anticlockwise (I think!) 15-16 full turns to return the grind to the espresso range. The plastic number ring is a guide only - it always ended up in different spots!

    I used to do that 2-3 times a year for cleaning - worked pretty consistently

    All the best
    Matt

  4. #4
    Life-long Learner DesigningByCoffee's Avatar
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    That's 15-16 turns of the micro adjuster - are you thinking of the burr carrier? I think that worked out at about 1/2-3/4 numbers worth of rotation in the burr carrier…

  5. #5
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    Haha
    Got it. So about 0.5-0.75 of the numbers clockwise to zero the unit, then adjust coarser from there.
    Thanks so much!
    Rob
    (mine does not have tin
    Quote Originally Posted by DesigningByCoffee View Post
    That's 15-16 turns of the micro adjuster - are you thinking of the burr carrier? I think that worked out at about 1/2-3/4 numbers worth of rotation in the burr carrier…

  6. #6
    Life-long Learner DesigningByCoffee's Avatar
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    Hmmm…
    I just used to wind it tighter / finer all the way until it stops (zero'd I'd say ) - then 15-16 micro turns coarser from there… is yours a stepped or stepless adjuster?



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