How to Adjust Grind Size on a De'Longhi Fully Automatic Espresso Machine

If your De'Longhi fully automatic espresso machine isn’t pulling shots at the right speed—either too fast or too slow—you’re likely dealing with the wrong grind size. Unlike manual grinders, many automatic machines have internal adjustments that control how finely the coffee is ground. Getting that right is essential for balanced extraction, proper crema, and avoiding under- or over-extracted shots.

The grind size on your De'Longhi fully automatic espresso machine can be adjusted using the ‘S’ dial located inside the bean hopper. Each full clockwise turn speeds up the shot flow (making the grind coarser), and each counterclockwise turn slows it down (making the grind finer). Adjustments should be made after brewing at least two shots and only when the grinder is active.

What Determines Espresso Flow Rate on a De'Longhi Machine?

The flow rate of espresso from a fully automatic machine like those made by De'Longhi depends heavily on the grind size of the coffee. A finer grind slows water flow and increases extraction time, while a coarser grind speeds it up. The factory settings are designed to work for average conditions, but factors such as bean freshness, roast level, and ambient humidity can affect how the coffee flows. That’s when adjusting the grind becomes necessary.

Where Is the Grind Adjustment Dial Located?

The grind size adjustment on a De'Longhi fully automatic coffee machine is managed via the ‘S’ dial. This is not an external knob but an internal control situated within the coffee bean storage compartment. It’s specifically engineered to let users fine-tune the grind without needing to access the burr mechanism directly. The position of the dial corresponds to different grind settings, with each marked number representing a distinct grind coarseness.

How to Adjust the Grind Size Step by Step

To adjust the grind size on your De'Longhi fully automatic coffee machine, follow these steps:

• Brew at least two shots of espresso first to establish a baseline.
• Ensure the grinder is running — adjustments can only be made when the machine is actively grinding coffee.
• Open the bean hopper to access the ‘S’ grind adjustment dial.
• Turn the dial clockwise to make the grind coarser, which will speed up the shot flow.
• Turn the dial counterclockwise to make the grind finer, slowing the shot flow.
• Make one increment change at a time and test the shot flow again.

When Should You Adjust the Grind?

Adjustments should only be made when you notice a consistent issue with the espresso extraction speed — either the shot pulls too quickly (indicating under-extraction, likely from a grind that’s too coarse) or too slowly (indicating over-extraction, likely from a grind that’s too fine). These symptoms often show up as weak flavour, sourness, or lack of crema for fast shots, and bitterness or harshness for slow ones. Only adjust after observing these patterns over multiple brew cycles.

Frequently Asked Questions

How do I know if my De'Longhi espresso grind is too fine or too coarse?

If your espresso shots are pulling too slowly and taste bitter or overly intense, the grind is likely too fine. If the shots pull too quickly, taste sour, or have little to no crema, the grind is probably too coarse. Use the S dial to adjust accordingly — finer for slower shots, coarser for faster ones.

Where is the grind adjustment dial on a De'Longhi fully automatic coffee machine?

The grind adjustment dial, marked ‘S’, is located inside the coffee bean storage compartment. You’ll need to open the bean hopper to access it. It’s not on the outside of the machine, but rather an internal control for adjusting grind coarseness.

Do I need to make grind adjustments every time I brew?

No, you don’t need to adjust the grind every time. The factory setting is designed for general use. Only adjust the grind when you notice consistent changes in shot speed or taste, such as shots pulling too fast or slow over multiple brews.

Can I adjust the grind when the grinder is not running?

No, the grind adjustment dial on your De'Longhi machine can only be turned when the grinder is actively running. This ensures the adjustment is applied correctly during the grinding process.

How much should I turn the grind dial each time?

Adjust the ‘S’ dial one full number or notch at a time. Each click either speeds up (clockwise, coarser) or slows down (counterclockwise, finer) the shot flow. Make small incremental changes and test the results after each adjustment.

Why does my espresso taste off even though the grind seems right?

Other factors besides grind size can affect taste — including bean freshness, dose amount, water temperature, and tamping pressure (if applicable). If grind adjustments don’t fix the issue, consider inspecting these other variables.

Recommended FrontStreet Coffee Blends for Espresso Machines

For use with De'Longhi and other fully automatic machines, FrontStreet Coffee’s Classic Blend offers rich crema and a smooth, well-rounded profile ideal for milk drinks like lattes and cappuccinos. For a more affordable yet flavourful option, the Black Cocoa Blend delivers bold body and chocolate notes without sacrificing crema. Both blends are tailored for espresso extraction and work reliably in home and commercial automatic machines. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.