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Removing the adjustment assembly

The adjustment assembly is the front part of the Z1. It’s held in place by 2 screws.

First start by removing the cup and spout

Loosen the 2 visible screws using the provided 2.5MM screwdriver

Support the adjustment assembly with one hand while removing the screws the rest of the way

 

Seating the adjustment assembly in place

Make sure the outermost ring of the adjustment assembly and grind chamber are clean and free of coffee grounds

Hold the adjustment assembly firmly against the grind chamber with one hand and line up the 2 mounting screws

Ensure the adjustment assembly is sitting flat and parallel to the grind chamber.

Start tightening up one of the side screws. While supporting the adjustment assembly with one hand. Ensure surfaces are flat and parallel

When one of the side screws is in all the way start tightening the other one. Alternate screws until both of them are tight

Screws need to be sufficiently tight, bot not overtightened

 

Cleaning

Start by removing the adjustment assembly

Clean the inside using the proved brush and set aside

Remove the prebreaker by simply pulling it out

Clean the inside of the grind chamber and prebreaker with the provided brush

To assembly push the prebreaker back onto the shaft. Make sure the prebreaker key is engaged by pushing the prebreaker in with both hands. You should feel the spring action.

Follow the steps to seat the adjustment assembly

 

Adjustment

It is suggested to make adjustments while the grinder is running. This is done to ensure no coffee particles are caught between the burrs while adjusting

You may hear short chirps while adjusting caused by coffee particles that may be between the burrs

It is often recommended to start at a larger setting and move down as grinding too fine may produce particles that are harder to clean up.

Starting around 200 for espresso is a good rule of thumb


Grinding

The Z1 can be used in 1 of 2 ways. Add beans to the hopper, replace the lid, and turn on. Or turn on, add beans to the hopper and replace the lid. Experiment with both and see which works better for you and the beans you are using

Do not forget to add the cup under the chute when grinding

 

Zeroing

Your Z1 will arrive already set to 0 and ready to use

Zeroing the dial will need to be performed in the event of a burr swap as different burr sets have different dimensions

To zero your Z1 start by removing the wood insert

Loosen the knob 1-2 full turns to ensure the burrs are not already touching

Start tightening the knob to get the burrs closer to each other

Stop tightening when you hear the first chirp and turn off the Z1. Prolonged running, while the burrs are touching, may wear them out prematurely

While holding the knob with one hand loosen the screw in the center using the provided 2.5MM screwdriver. 1-2 full turns should be sufficient, do not remove the screw.

The dial, located behind the knob should now move freely and independently of the knob. Set the dial to 0 with one hand while holding the knob with the other.

While holding the knob with one hand, tighten the screw. Do not over tighten.

Place the wood insert back in.

 

Using the Knocker

The knocker will help break the static and release any ground.

To use the knocker simply tap the chute on one side a couple of times

It’s often a good idea (especially in low humidity conditions) to use the knocker after every grind. This ensures no grounds from previous sessions are left in the spout

 

In the event of a stall

Always test and pay close attention when using new beans or a new grind setting. If you hear the Z1 struggling, turn it off immediately and try a coarser grind setting.

In the event of a stall, contact us at info@zerno.co and we will work with you to resolve the issue.