Jump to content
onluxtex

EK 43 alignment grinding chamber

Recommended Posts

Acc. to the German Coffee Forum a lot of EK owners complain that the EK is not well adjusted ex works.

Did anybody do it in this way?28870960hp.jpg

Share this post


Link to post
Share on other sites

I've done this on my Guatemala which is very similar to the EK. If you need tips or help let me know :)

 

T.


Espresso: Londinium L1, ZR-71 grinder

Photography: Flickr

Share this post


Link to post
Share on other sites

Thanks a lot. I was working on it for some hours and was sure I have done it well. People say acc. to the sound it is not well done.

May be I didn´t fasten the threaded rods too much or not too much so that the chamber has changed its position during grinding.

I don´t know what to do. I fear to spoil the thread if I fasten too much. I have no idea in loosen the chamber to start again from the beginning.

Share this post


Link to post
Share on other sites

can you explain in a bit more detail what you're doing here?

 

I think most people are familiar with aligning using shims, but are you trying to alter the internals of the motor? or getting a measurement of how much to shim?

 

i is a bit confusing


Yuxo09y.jpg

Share this post


Link to post
Share on other sites

People say the alignment of the burrs is not enough. More important is the chamber!? They adjust the chamber by loosing or tightening the 4 threaded rods.

Share this post


Link to post
Share on other sites

What is their explanation for the importance of the chamber which, it seems to me, is not involved in the grinding process only in the delivery of the ground coffee.

Share this post


Link to post
Share on other sites

Not having seen an EK at close quarters I imagine that by adjusting the chamber to be precisely perpendicular (90 deg) to the shaft / spindle would obviate the need for packing the fixed burr and possibly improve balance O/A ?

Share this post


Link to post
Share on other sites

Sorry I don´t know. There are some people in the German Forum who discuss without open end about 0,1g of beans or 0,001mm alignment and even claim that they taste a difference. They even don´t accept the alignment method of Matt Perger with the felt pen. They prefer a gauge like shown in the above foto. It is no more my world. I can only taste a difference between beer and wine.

Share this post


Link to post
Share on other sites
Not having seen an EK at close quarters I imagine that by adjusting the chamber to be precisely perpendicular (90 deg) to the shaft / spindle would obviate the need for packing the fixed burr and possibly improve balance O/A ?

 

yes, that is the reason.

Share this post


Link to post
Share on other sites

ok I can buy the explination, certainly would love an alignment solution that's a bit more scientific and easier to achieve, I always find the shimming to be a bit of a pain.

 

just had a look at the thread and can't understand what's being adjusted though, there's reference to the cap nuts being loosened/tightened.

 

are these the 3 nuts that you can see in the photo's?


Yuxo09y.jpg

Share this post


Link to post
Share on other sites

Can't personally see the point of moving the chamber around, it plays no part in the grinidng process. I've not read through the thread though so bear with:)

 

T.


Espresso: Londinium L1, ZR-71 grinder

Photography: Flickr

Share this post


Link to post
Share on other sites
ok I can buy the explination, certainly would love an alignment solution that's a bit more scientific and easier to achieve, I always find the shimming to be a bit of a pain.

 

just had a look at the thread and can't understand what's being adjusted though, there's reference to the cap nuts being loosened/tightened.

 

are these the 3 nuts that you can see in the photo's?

 

No, at the front and back there are four cap nuts. They are connected with threaded rods.

Share this post


Link to post
Share on other sites

Right, scratch my above reply, it does make some sense as the "bottom" burr sits on the chassis effectively. The shaft needs to be smack in the center, otherwise the burrs will not run true, but what you need to keep in mind is that the burr mounting holes have some slack, so assuming your EK is not completely off, you should be able to simply move the "bottom" burr around and lock it in place when the DTI shows 0 error.

 

T.


Espresso: Londinium L1, ZR-71 grinder

Photography: Flickr

Share this post


Link to post
Share on other sites

From my reading of the article they are not centering the fixed burr support/ chamber but rather adjusting its angle / tilt to bring it perpendicular to the shaft / motor. Hence the rotating of the burrs and use of feeler gauges through the coffee exit chute to check for parallel between the burr's after adjustment.

 

Reading further in the article they imply that it is a similar set up in the Ceado ?

Share this post


Link to post
Share on other sites

They do both, first the chamber, than the fixed burr and than the rotating burr.

Share this post


Link to post
Share on other sites

Surely it's much easier to stick shims under the burr to get it perpendicular to the shaft axis of rotation?

 

T.


Espresso: Londinium L1, ZR-71 grinder

Photography: Flickr

Share this post


Link to post
Share on other sites

IMO this makes a difference, and Malkonig have ignored it, then what a pile of tosh their R&D dept is.

 

i prefer to think it makes no difference, they know that, and some joker is having you all on....


Ghe sboro fioi!

Share this post


Link to post
Share on other sites
IMO this makes a difference, and Malkonig have ignored it, then what a pile of tosh their R&D dept is.

 

i prefer to think it makes no difference, they know that, and some joker is having you all on....

 

yes, Mahlkonig ignores some crazy people like us. The EK owners from shops and bars don´t care. Mahlkonig knows that.

Share this post


Link to post
Share on other sites

It will make a difference, although I can't see why sticking aluminium foil under the stationary burr isn't the prefered solution here. The whole DTI way of checking alignment is a good idea and I'd recommend it much more than felt pens and feeler gauges.

 

Mahl doesn't give a crap as they know they can sell their grinders regardless. Same reason why so little changed in grinders over the years, R&D costs money, and lots of it, so they go down the "if it ain't broke don't fix it" route.

 

T.


Espresso: Londinium L1, ZR-71 grinder

Photography: Flickr

Share this post


Link to post
Share on other sites

I will probably look into this a bit further. Maybe my wife can translate some of the thread discussions for me. What I did find when reassembling mine was that if you don't align the plates the motor can actually catch and not spin freely and that the threaded rods don't fill the holes in the motor housing so there is quite a bit of room for rotation of the front plate relative to the rear though I don't know what effect that would have on alignment, more on smooth running I think. Are they talking about relative torque of each bolt? What exactly are they adjusting particularly in relation to the front housing?


Home: Sage Dual Boiler, Probat EK43 & Feldgind

Work: Sage Dual Boiler & Niche Zero

Share this post


Link to post
Share on other sites
What exactly are they adjusting particularly in relation to the front housing?

 

It is about 0,08mm. It takes a lot of time to get the chamber by fastening/loosing the rods all around to 0,00mm.

I did it. But I did not taste any difference as some people say.

Share this post


Link to post
Share on other sites
What I did find when reassembling mine was that if you don't align the plates the motor can actually catch and not spin freely and that the threaded rods don't fill the holes in the motor housing so there is quite a bit of room for rotation of the front plate relative to the rear though I don't know what effect that would have on alignment, more on smooth running I think. Are they talking about relative torque of each bolt??

What do you mean by "plates"? The grinding chamber and rear cover? I believe mine had small markings for the alignment.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • About:

    Coffee Forums UK is the UK's premier coffee forum Started in June 2008 by Glenn Watson, we now have more than 22000 mainly UK based members, and welcome more than 3000 members and visitors from around the world each day! With strategic investment and digital expertise from the Jackson Lockhart team (Tait Pollack and Adam Bateman), we are taking Coffee Forums UK to the next level, and are delighted to share the journey with you.

    New Members:

    We are often referred to as the friendliest forum on the web and we look forward to welcoming you onboard.

    Terms of Use

    Advertising

    Coffee Forums Media Kit

    Buy Advertising Space

    Donate

    Get Your Supporter Badge (per year)

×
×
  • Create New...