Calibration of 1Zpresso Grinders

There are three types of adjustment designs for 1Zpresso grinders, including internal adjustment, top adjustment and external adjustment. Many people might be curious about how to calibrate each of them. Therefore, today we’re going to explain to you.

How to Find the Zero Point / Starting Point?

First of all, we would like to define the zero point/starting point of our grinders. Turn the adjustment dial clockwise all the way to find the zero point/starting point of the grinders. We define it to be at the point when you feel resistance while turning the crank handle instead of the tightest of the adjustment dial.


Internal Adjustment

Q2 / JX / JE

For people who have the Q2 / JX / JE, which are equipped with the internal adjustment, congratulations, you’ve already found the starting point by turning the adjustment dial clockwise till the crank handle won’t rotate drastically. The numbers on the dial are designed for counting how many steps you’ve turned and therefore the starting point is not necessary to be at #0.

Calibrating the 1Zpresso JX grinder

Top Adjustment

JX-Pro / JE-Plus

Calibrating the 1Zpresso JX-Pro grinder
The full expanded view of JX-Pro grinder

Generally, the top adjustment shares the same concept with the internal adjustment that the numbers on the dial are designed for counting how many steps you’ve turned and therefore the starting point is not necessary to be at #0. However, if you would like to set the starting point to #0, please follow the few steps below:

Step 1. When the dot points to #1/#2/#3 instead of #0 at the tightest, please simply remove the adjustment dial (by twisting it counterclockwise).

Step 2. Adjust the knurled thumb nut counter-clockwise by 1/2/3 clicks.

Step 3. Screw back the adjustment dial and the starting point should be at #0 (±2 clicks).


External Adjustment

K-Pro / K-Plus / K-Max

For the K-Pro / K-Plus, to set your grinders to zero, please follow these steps:

The full expanded view of K-Pro, K-Plus and K-Max grinder

Step 1. Tighten the adjustment dial counter-clockwise and ensure the gap inside is fully closed.

Calibrating the 1Zpresso K-Pro grinder

Step 2.

  • If the red dot is at the right of #0, loosen the adjustment dial clockwise a little bit, loosen the knurled thumb nut counter-clockwise and re-tighten the dial while pressing the burr from the bottom.
  • If the red dot is at the left of #0, note the clicks of distance from #0 (for example, 12 clicks), loosen the adjustment dial clockwise a little bit, and tightened the knurled thumb nut clockwise by around 12 clicks while pressing the burr from the bottom.


Step 3. Repeat step 1 and 2 until the red dot points to #0.

Calibrating the 1Zpresso K-Pro grinder

External Adjustment

J-Max

The full expanded view of J-Max grinder

The starting point should be where the #0 is aligned with the scale mark, and the bottom edge of the adjustment dial ring touches the first tier of the scale mark.

Tighten or loosen the knurled thumb nut while pressing the burr from the bottom to set the starting point to #0.


Correct calibration of J-Max grinderIncorrect calibration of J-Max grinder