I just acquired a Compak K10 (Wega 6.8 conical) grinder. The grinder adjustment was way off scale for espresso. Before loosening and adjusting the grinder adjustment dial position, I attempted to find the zero point. I found this more difficult to locate precisely compared to my other grinders (Mazzer Super Jolly, Mini e). There seems to be more "float" in the grinder adjustment. Once the burrs are noted to touch, one has to back off quite a bit to stop the burrs from touching. The Mazzers have a more discrete zero and the burrs stop touching with just a slight coarse adjustment. Aside from a hex nut wobble, the Compak burrs appear to spin true without wobble. Is this typical for this model? ?Related to conical burrs vs flats. In the cup seems to be fine. Actually excellent considering still new with less than 2 pounds beans used. Softer, more discrete spectrum of flavors compared to my SJ with Metropolis Redline and Klatch Belle.

I just received a Wega 6.8 in the mail today. I only had a few minutes to play with it and then the electricity went out. . . . You have to love stormy weather. Anyway, I also noted the hex nut wobble on mine, although it looked like the burrs were spinning true without any wobble. Since I have not been able to play with it beyond this point I will have to get back to you on the zeroing and such.

Did you notice what looked like an excessive amount of grease on the collar threads? I know you do not want cross-threading, but it looks like they went a little overboard on mine.

No extra lube noted. I removed the doser and attached a doserless spout and am utilizing a gralab timer to modulate dosing. The spout pulls off easily to make chute cleaning a breeze. The autofill/fingerguard was removed. The chute is also easily cleaned with a vacuum hose connected directly to the spout.

Allen screw wobble aside, I believe that the grind adjustment carrier on the 2 units I used has more vertical play than other grinders I've used and is more difficult to find the soft zero point. The lock down screw helps this a bit.

bRobert wrote:There seems to be more "float" in the grinder adjustment. Once the burrs are noted to touch, one has to back off quite a bit to stop the burrs from touching. The Mazzers have a more discrete zero and the burrs stop touching with just a slight coarse adjustment.

I agree, the Compak burr assembly seems to have more "play" than the Mazzer. I believe the tighter feel is thanks to Mazzer's floating spring support system noted in Commercial Espresso Grinders:

HB wrote:All the Mazzer grinders have a similar burr adjustment mechanism. The upper burr carrier "floats" on three springs. The chrome adjustment collar encircles the throat of the collar, holding it at the desired height above the fixed lower burr assembly:


Threaded adjustment collar in chrome and upper burr carrier (L), close-up of upper burr (R)

This close-up shows how the lower portion of the spring suspension of upper burr carrier assures no thread slop. Under the tension of the supporting springs, the carrier is pressed tightly against the bottom of the chromed adjustment collar:


Lower burr mounted atop the motor's shaft (L), close-up of support spring (R)
(from Mazzer Mini Component Photos)

That said, I've used the K10 daily for the last few years and its grind setting is certainly steady. It dialed in without issue and returning to the same point after reassembly was straightforward, so I've never paid attention to its zero point.

Dan, I appreciate the info. The Mazzer spring system explains the reduced play compared to the Compak.
In the cup, I continue to be astounded by the Compak. NO sink shots since dialing in the initial range. Each blend revisited is a new experience. While they last, the Wega 6.8A (rebadged W10) is a STEAL (nearly 50% off) obtained directly from Wega USA (Tom Rolleri).