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Easy Mod for Stepless Macap M4/Upgraded w/return spring 2/26/08
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Discussions > Espresso > Grinders -... > Easy Mod for...  
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cdrikari
Senior Member
cdrikari
Joined: 8 Mar 2007
Posts: 39
Location: Port Orchard, WA
Expertise: I love coffee

Espresso: Rancilio Silvia
Grinder: Macap MXKR, Baratza Virtuoso
Drip: Braun
Posted Sun May 11, 2008, 7:10pm
Subject: Re: Easy Mod for Stepless Macap M4/Upgraded w/return spring 2/26/08
 

Yeah, like Barrett said, no issues doing it on the MXKR.  Barring the spring though, I've reinserted the screws for now.  The worm assy does tend to pop out fairly easily when adjusting without the screws (you _really_ have to hold it in) which is part of the reason.  The other is, I just want to play with the grinder some more for espresso before I see how easy it is to use for both.

--Jesse
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JVBorella
Senior Member
JVBorella
Joined: 29 Oct 2007
Posts: 1,166
Location: northeastern CT.
Expertise: I live coffee

Espresso: Speedster, Strega, Cremina
Grinder: K10 WBC, Bunnzilla
Vac Pot: Hario NCA 3 & 5, Mitzudash
Drip: Hario Wooden Neck/Buono
Roaster: Hottop KN-8828P/B
Posted Mon May 12, 2008, 6:03am
Subject: Re: Easy Mod for Stepless Macap M4/Upgraded w/return spring 2/26/08
 

cdrikari Said:

Yeah, like Barrett said, no issues doing it on the MXKR.  Barring the spring though, I've reinserted the screws for now.  The worm assy does tend to pop out fairly easily when adjusting without the screws (you _really_ have to hold it in) which is part of the reason.  The other is, I just want to play with the grinder some more for espresso before I see how easy it is to use for both.

--Jesse

Posted May 11, 2008 link

 It really depends how tight the fit is on the hinge mount. My worm would stay put while grinding as long as I had pushed it firmly up against the toothed ring so it "locked" in place. If I was sloppy about it it would pop out occasionally. With the spring on there its not an issue so I recommend adding the return spring if you are going to do the mod.

 
John
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cdrikari
Senior Member
cdrikari
Joined: 8 Mar 2007
Posts: 39
Location: Port Orchard, WA
Expertise: I love coffee

Espresso: Rancilio Silvia
Grinder: Macap MXKR, Baratza Virtuoso
Drip: Braun
Posted Mon May 12, 2008, 9:51pm
Subject: Re: Easy Mod for Stepless Macap M4/Upgraded w/return spring 2/26/08
 

JVBorella Said:

It really depends how tight the fit is on the hinge mount. My worm would stay put while grinding as long as I had pushed it firmly up against the toothed ring so it "locked" in place. If I was sloppy about it it would pop out occasionally. With the spring on there its not an issue so I recommend adding the return spring if you are going to do the mod.

Posted May 12, 2008 link

Oh, yeah, sorry if I was unclear.  It locks tight during grinding.  If I try to adjust the grind with the worm gear knobs, I have to hold it in hard or it pops out due to the stiffness of the upper burr assy.

I've been looking at the hinge and torsion springs alot and as the existing hinge is built, it looks really hard to mount. An existing spring hinge could be mounted to the casing of the grinder with an adapter plate to get rid of the curve, but still...  you may have the best solution implemented right now.

(Not that I'm not going to keep looking at the hinge and at springs every time I'm at the hardware store.... ^_^)

As far as sources go, there are some companies that provide spring hinges in cabinet hardware that are about 2" wide.  But I think for the strength, if you pulled one out of a mousetrap that would be a good cost/strength/size combo.


-Jesse
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GaryH
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GaryH
Joined: 24 Oct 2003
Posts: 2,530
Location: San Jose California
Expertise: I love coffee

Espresso: Isomac Zaffiro
Grinder: Macap M4 Doserless
Vac Pot: none
Drip: yes
Roaster: none
Posted Sat Sep 13, 2008, 4:23pm
Subject: Re: Easy Mod for Stepless Macap M4
 

fifthgen Said:

Looks nice  I have a concern as to what happens if the worm pops up in the middle of a grind.  I'd look to a stainless piano wire pin on a ring (like grenade pin)  to lock it down but I don't own a Macap.

Posted February 7, 2008 link

I made the mod six months ago (pics on page one of this thread). About a month ago I did have the worm pop up in the middle of the grind and the top burr carrier started spinning like crazy. Freaked me out. So I now have this very simple but ugly looking fix. Just put a rubber band around it as show in these pics. I can easily change the grind for espresso because the rubber band just slips. Rubber band also holds the worm very tight against the toothed ring so there is even less play compared to holding the worm in place with the original two screws.

GaryH: Macap_rubberband1.jpg
(Click for larger image)
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JVBorella
Senior Member
JVBorella
Joined: 29 Oct 2007
Posts: 1,166
Location: northeastern CT.
Expertise: I live coffee

Espresso: Speedster, Strega, Cremina
Grinder: K10 WBC, Bunnzilla
Vac Pot: Hario NCA 3 & 5, Mitzudash
Drip: Hario Wooden Neck/Buono
Roaster: Hottop KN-8828P/B
Posted Sun Sep 14, 2008, 7:29am
Subject: Re: Easy Mod for Stepless Macap M4
 

GaryH Said:

I made the mod six months ago (pics on page one of this thread). About a month ago I did have the worm pop up in the middle of the grind and the top burr carrier started spinning like crazy. Freaked me out. So I now have this very simple but ugly looking fix. Just put a rubber band around it as show in these pics. I can easily change the grind for espresso because the rubber band just slips. Rubber band also holds the worm very tight against the toothed ring so there is even less play compared to holding the worm in place with the original two screws.

Posted September 13, 2008 link

Why not just add the spring & be done with it?

 
John
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GaryH
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GaryH
Joined: 24 Oct 2003
Posts: 2,530
Location: San Jose California
Expertise: I love coffee

Espresso: Isomac Zaffiro
Grinder: Macap M4 Doserless
Vac Pot: none
Drip: yes
Roaster: none
Posted Sun Sep 14, 2008, 2:15pm
Subject: Re: Easy Mod for Stepless Macap M4
 

JVBorella Said:

Why not just add the spring & be done with it?

Posted September 14, 2008 link

I had a rubber band laying around. No need to make a trip to the hardware store to get a spring and to make a spring hook. Seems to me that the rubber band can be installed and removed faster and easier compared to a spring, and it accomplishes the same thing the spring does which is to put tension on the worm drive. The spring is a much more elegant solution compared to a rubber band though.
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zcaster
Senior Member


Joined: 8 Dec 2008
Posts: 10
Location: nj
Expertise: I like coffee

Espresso: s1 vivaldi
Grinder: la cimballi jr
Posted Sat Apr 25, 2009, 10:59am
Subject: Re: Easy Mod for Stepless Macap M4
 

Being an electrician I always have a bit of wire about. I took a piece of 14 gauge solid wire, stripped the
insulation off and inserted the wire where the screw goes. This holds the worm gear down while grinding
and pulls out for adjustment. Slips right back in for grinding again. Only one side needs to anchored, so there
is no hassle having to do both sides.
This is more easily accomplished with the handles off, but I leave the handles on and have no problem.
Cheers!
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nelamvr6
Senior Member
nelamvr6
Joined: 16 Oct 2007
Posts: 83
Location: New London, CT USA
Expertise: I love coffee

Grinder: Macap MC4 Stepless Doserless
Vac Pot: Yama
Drip: Technivorm KBTS
Roaster: Behmor 1600
Posted Sat May 9, 2009, 11:02am
Subject: Re: Easy Mod for Stepless Macap M4
 

zcaster Said:

Being an electrician I always have a bit of wire about. I took a piece of 14 gauge solid wire, stripped the
insulation off and inserted the wire where the screw goes. This holds the worm gear down while grinding
and pulls out for adjustment. Slips right back in for grinding again. Only one side needs to anchored, so there
is no hassle having to do both sides.
This is more easily accomplished with the handles off, but I leave the handles on and have no problem.
Cheers!

Posted April 25, 2009 link

I took a similar approach.  I went to my local Lowes and purchased a hitch pin for less than $2.  Actually they came 2 to a package, so the cost was even less!

They look just like the photo below.  The shiny steel matches the grinder, it's easily taken out and put back in and securely holds the worm gear in place.  Also, it doesn't interfere with the operation of the worm gear.  The only drawback is that I can't put the knob back on.  That doesn't bother me, but I can see how some might not be all that pleased with this.

nelamvr6: DSC08844.jpg
(Click for larger image)
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morgan_greywolf
Senior Member
morgan_greywolf
Joined: 27 Feb 2009
Posts: 155
Location: Hudson, FL
Expertise: I live coffee

Espresso: PID'd Hamilton-Beach
Grinder: Infinity, Zassenhaus
Vac Pot: I was told they suck. :-)
Drip: AeroPress
Roaster: Cattle Dog Roasters
Posted Sat May 9, 2009, 11:54am
Subject: Re: Easy Mod for Stepless Macap M4
 

JVBorella Said:

Sounds time consuming but it certainly looks nice & gets a lot of info in a small space.  I'm going to work on adding a return spring to the worm adjuster over the weekend. If I come up with something I'll post some pics.

Posted February 8, 2008 link

It's not.  It's a little bit easier in an image editing application like Photoshop (expensive, hundreds of dollars), Paint Shop Pro ($99, free demo)  or The Gimp (free/open source software).  I think Microsoft Office Standard includes a really basic image editing app, too, but I don't use it.

You just take your pictures, crop them to the correct size in the image editing app of your choice (there are lots of others, but those 3 are, IMHO, the best).  You want to make sure they are all exactly the same size.  The crop tool helps with this by showing you the dimensions somewhere on the screen while you're cropping.  If you want six images like GaryH did, then you just make a new image three times wider a two times higher than one image.  Then you copy and paste and position the images into the new image and save in the format of your choice.

(Completely OT, I know, but someone might want to add this information to a forum FAQ somewhere?)

 
http://lowendespresso.blogspot.com/
Ever mind that water purifies the machine, but espresso purifies the soul!
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JVBorella
Senior Member
JVBorella
Joined: 29 Oct 2007
Posts: 1,166
Location: northeastern CT.
Expertise: I live coffee

Espresso: Speedster, Strega, Cremina
Grinder: K10 WBC, Bunnzilla
Vac Pot: Hario NCA 3 & 5, Mitzudash
Drip: Hario Wooden Neck/Buono
Roaster: Hottop KN-8828P/B
Posted Sat May 9, 2009, 5:59pm
Subject: Re: Easy Mod for Stepless Macap M4/Upgraded w/return spring 2/26/08
 

The springs only cost $.50 -$1.00 & you don't have to remove & replace something each time you move the worm drive but whatever works.

 
John
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