A magnet in the Z2 stand centers your dosing cup under the chute knocker. If your cup or a third-party shaker pushes away from that spot instead of snapping into place, the magnets are facing the wrong way.
Why it happens
The Z2 stand uses a south-up magnet. Some third-party shakers, including the standard Weber Workshops blind shaker, use the opposite polarity by default, so they repel instead of attract. Occasionally a dosing cup magnet is flipped during assembly too.
Using a Weber Workshops shaker
Weber sells a magnetless version of its shaker. You install the magnet yourself with a small amount of superglue, so you can match it to the Z2's south-up stand magnet.
Flip the stand magnet
If you want your shaker to seat and would rather change the stand, you can reverse the stand magnet at home.
- Dab a small amount of acetone around the stand magnet to loosen the adhesive. A damp towel with acetone left on it for a few minutes helps.
- Gently pry the magnet out with a flat edge that will not scratch the stand.
- Wipe the pocket clean so the new bond holds.
- Apply a small amount of cyanoacrylate glue (superglue) to the opposite side of the magnet.
- Press it back into the pocket with the flipped side down, hold firm pressure for about 30 seconds, and let it cure for a couple of hours.
The stand has a shallow pocket for the magnet, so you do not need to mark its position first. This can take some patience, since every Z2 is hand assembled. Keep in mind that flipping the stand magnet means the Zerno dosing cup will no longer seat.
Related
Is This Normal? Common Z2 Questions From New Owners | Purge Mode, the Chute Knocker, and Reducing Retention on Your Z2