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Espresso: Espresso Mods and Restorations
CBSJ mod (CalBlacksmith SJ doser mod)
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Discussions > Espresso > Espresso Mods > CBSJ mod...  
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calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,950
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Mon Jan 23, 2012, 7:28am
Subject: CBSJ mod (CalBlacksmith SJ doser mod)
 

This info has been asked for several times on line  and I have had emails asking also so, as I had a grinder in the shop to be rebuilt, I did the mod to the doser and took pics of it while I went.

I removed the doser from the SJ for rebuilding

The grinder in this thread is an older model from 1996 that I have refinished and it is the unfinished one in my thread SJ hospital. http://coffeegeek.com/forums/espresso/machinemods/555826 It has an Aluminium doser and not the now current SS one, it had suffered extensive damage in it's prior life and need a full disassembly and reconstruction of the housing. I opted for a glass bead blasted finish and sealed it with clear mat finish.

The mod is much easier to do with the doser off of the grinder but my first one was done while the doser was on the grinder so it can be done, it is just a bit harder to hold things in alignment while you are doing the job as the star wheel is spring loaded.

I used clear plastic from a package of saw blades but any similar package will work, this plastic is common and easily available on just about anything you buy today that is in clear hard plastic hanger packaging. I am sure it is not food safe and has not been tested for this but I really have a hard time thinking that it will hurt you with the brief contact with dry food. If you have issues with this, find a similar plastic that you are happy with.

I used only basic tools and what you have will likely work too. You will need some two sided tape, a straight edge, a razor knife and something to measure with. I used blocks of material that were sized at 1" and 3/4" this worked great and you should use the same dims. If you remove the doser, you will need an hex wrench and a screwdriver.

I had removed the plastic window of the doser as it was broken and need to be replaced. If you choose to remove your window, some dish soap, thinned with water and liberally applied around the window will help it to slide out, it will probably have a bunch of coffee grounds between the housing and the window, most I have seen do, so it may take a little work to get it out. You do not need to remove the window but it makes holding things in alignment much easier.


So, lets get started. The first several pics are the tools and supplies need for the job.

OK, this first pic is the plastic package I used for the mod. This one package has enough material to do several grinders so if you make mistakes, do not worry, you have lots to work with.

Be as accurate as possible when cutting, the better you keep the blades the same size, the better they will work. I use 3 blades out of the 6 on the star wheel, if you want to use every spot, fine, every other one works OK for me.

calblacksmith: rawstock.jpg
(Click for larger image)

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,950
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Mon Jan 23, 2012, 7:29am
Subject: Re: CBSJ mod (CalBlacksmith S J doser mod)
 

The razor knife but anything sharp will do, please do not cut yourself.... I do not mail bandaids.

calblacksmith: knife.jpg
(Click for larger image)

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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 View Profile Visit website Link to this post
calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,950
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Mon Jan 23, 2012, 7:30am
Subject: Re: CBSJ mod (CalBlacksmith S J doser mod)
 

This is my roll of double sided tape, yours may look different, that is OK, use what you have.

calblacksmith: tape.jpg
(Click for larger image)

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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 View Profile Visit website Link to this post
calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,950
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Mon Jan 23, 2012, 7:31am
Subject: Re: CBSJ mod (CalBlacksmith S J doser mod)
 

This block is one inch thick, it makes measuring easy and there is a built in edge to cut against.

calblacksmith: one inch.jpg
(Click for larger image)

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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 View Profile Visit website Link to this post
calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,950
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Mon Jan 23, 2012, 7:32am
Subject: Re: CBSJ mod (CalBlacksmith S J doser mod)
 

This is the same as above but it is 3/4 inch thick.

calblacksmith: three quarter inch.jpg
(Click for larger image)

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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 View Profile Visit website Link to this post
calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,950
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Mon Jan 23, 2012, 7:33am
Subject: Re: CBSJ mod (CalBlacksmith S J doser mod)
 

EDIT: In my steps, I cut the 1" dim strip first but if you cut the strip 3/4" rather than 1", you will have a MUCH better chance of keeping the critical dim the same for every blade. The most important dim is the 3/4" as this is the spacing between the upper star wheel and the floor of the doser.

I used colored paper here to show how to cut the plastic, clear is hard to take pictures of.
Place the side of the block along one edge of the stock then you are ready to go.

calblacksmith: lay out one inch strip.jpg
(Click for larger image)

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
back to top
 View Profile Visit website Link to this post
calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,950
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Mon Jan 23, 2012, 7:34am
Subject: Re: CBSJ mod (CalBlacksmith S J doser mod)
 

Run the razor knife along the side of your block to cut a one inch wide strip of stock.

calblacksmith: cut one inch.jpg
(Click for larger image)

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
back to top
 View Profile Visit website Link to this post
calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,950
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Mon Jan 23, 2012, 7:35am
Subject: Re: CBSJ mod (CalBlacksmith S J doser mod)
 

The finished one inch wide strip of stock.

calblacksmith: cut one inch strip.jpg
(Click for larger image)

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
back to top
 View Profile Visit website Link to this post
calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,950
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Mon Jan 23, 2012, 7:38am
Subject: Re: CBSJ mod (CalBlacksmith S J doser mod)
 

Next, cut the one inch strip into 3 pieces, 3/4" wide, use the same method you did with the block to make the one inch strip.

calblacksmith: three quarter layout.jpg
(Click for larger image)

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
back to top
 View Profile Visit website Link to this post
calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,950
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Mon Jan 23, 2012, 7:43am
Subject: Re: CBSJ mod (CalBlacksmith S J doser mod)
 

Your blades should now be 1" x 3/4"

calblacksmith: cut blade.jpg
(Click for larger image)

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
back to top
 View Profile Visit website Link to this post
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