Where the coffee waits
With single dosing, you weigh the beans for the brew before putting them into the grinder. With a hopper-fed routine, you leave a larger supply above the burrs, the cutting surfaces that grind the beans, and take each dose from it.
The distinction is what you load, not whether the grinder has a hopper at all. Sigma Coffee's DF54 V4 is sold as a single-dose grinder but includes a small hopper, bellows and a catch cup. [1]
A larger hopper need not commit you to keeping it full. Baratza lists a 300g hopper on the Encore ESP, yet also offers a compatible single-dose hopper whose stated purpose is to measure beans before grinding and swap between coffees. [2][3]
That is a useful distinction before buying a replacement grinder. The Encore ESP already has a manufacturer-supported route to single dosing. This does not establish that its results or retained coffee match those of a dedicated single-dose design.
What happens when you change coffee?
The next beans have to follow whatever coffee is already in the grinder. A hopper containing your regular beans gives you a supply to deal with before loading decaf. Starting with only the intended dose avoids keeping that larger supply there.
Baratza's Encore ESP manual distinguishes beans in the hopper from beans further inside. Its hopper-removal instructions require removing the hopper's beans and grinding the remaining beans through first. That is evidence that an empty-looking hopper is not the same as an empty grinder, not a universal bean-changing procedure. [4, p7]
| Stage | A larger supply left in the hopper | Beans loaded for one brew |
|---|---|---|
| Before grinding | The coffee is already above the burrs. | Weigh and load the beans for this brew. |
| Changing to another coffee | Account for the previous supply still in the hopper as well as coffee further inside. | There is no deliberately stored batch to clear, but coffee may still remain inside. |
| Checking the dose | Check the grounds you will use, rather than treating hopper capacity as a dose. | Check the grounds too: weighing beans does not certify what came out. |
Sources: Baratza's single-dose accessory description and Encore ESP manual, with Sigma's documented small-hopper example; checked 19 October 2026. [1][3][4] The table explains the two routines, not measured performance.
Follow your model's instructions for changing beans. This is not a reason to remove parts while the grinder is powered or to improvise a way around its safety interlock.
Single dosing is not proof of zero retained coffee
Retention means coffee left inside the grinder rather than delivered into your cup or grounds bin. Loading a measured amount does not establish how much remains, or whether any coffee from the previous brew comes out with it.
The Encore ESP manual describes ground coffee sticking to built-up oils and obstructing the grinding chamber or exit chute. That confirms that coffee can remain inside. It does not provide a normal retention figure for this grinder. [4, p10]
Sigma describes the DF54 V4's bellows and plasma generator and makes reduced-retention claims. Those are the seller's claims, not measurements from BaristaCritic. They do not establish a retained weight or prove that switching from regular beans to decaf leaves no regular coffee behind. [1]
Weighing the grounds helps you check the amount available for brewing. It cannot identify which beans produced those grounds. A matching input and output weight is not a test for carry-over from the previous coffee.
There is no supported purge quantity or number of bellows presses to give from these documents. If avoiding carry-over matters to you, do not treat the words “single dose” as that assurance.
Loading beans and stopping the motor are different jobs
Single dosing describes how coffee enters the grinder. It does not, on its own, mean timed grinding or a built-in scale that stops the motor at a chosen weight.
On the Encore ESP, Baratza documents an on/off knob and a pulse button. The pulse button keeps the grinder running while held and stops it when released. Changing to the compatible single-dose hopper does not replace those documented controls. [4, p6]
If your aim is to press a button and repeat a grind duration, that is a separate feature to look for. The existing comparison explains the difference between a programmable grind timer and manual stopping.
A different coffee may need a different grind setting
Weighing beans separately does not make the previous grind setting appropriate for every coffee. Baratza calls its suggested Encore ESP settings starting points and says the recipe and taste preference may require finer or coarser grinding. [4, p5]
The adjustment system is another separate choice. Baratza divides the Encore ESP's 40 settings into an espresso range, 1 to 20, and a filter range, 21 to 40. Sigma describes its DF54 V4 as stepless, meaning adjustment is not limited to fixed clicks. [1][4, p5]
Neither description is a taste verdict. A recorded setting gives you a reference to return to, not a promise that a different coffee will brew the same way. Keep a note of the coffee and setting together.
There is also a model-specific instruction worth retaining: Baratza says the Encore ESP must be running or completely empty of beans when making grind adjustments. Do not transfer that instruction to an unfamiliar grinder without checking its own manual. [4, p6]
Decide which part of your routine needs changing
If you switch coffees frequently, avoiding a stored hopperful addresses a particular inconvenience. You still need to load each brew, use the grinder's controls and account for coffee that may remain inside.
If you use one coffee repeatedly, keeping it in the hopper avoids loading beans afresh for every brew. That convenience does not determine the ground dose, the grind setting or whether the motor stops automatically.
Before buying anything, separate the problem you want to solve: clearing stored beans, measuring a dose, stopping the motor or adjusting the grind. A different hopper can change the first job without changing the others.
For Sage Bambino owners, matching the basket to freshly ground or pre-ground coffee is the next useful check. A single-dose routine does not change what the basket is designed to do.
Check your existing grinder before buying another
Choose single dosing if you change coffees often and want to avoid clearing a stored hopperful each time. You will still load every brew yourself; the routine does not prove that the grinder is free of the previous coffee.
If you already own an Encore ESP, check Baratza's compatible single-dose hopper before replacing the grinder. It gives you a manufacturer-supported way to measure beans before grinding and switch coffees, so you may not need a dedicated single-dose grinder for that job. [3]
Before buying either a hopper or a grinder, check exact-model compatibility, the documented motor controls and grind-adjustment instructions. The cited documents do not provide retained-weight figures that let us compare these options. Choose for the documented routine you need, not an unquantified promise of less retained coffee. [1][3][4]
Sources
- Sigma Coffee UK, DF54 V4 product specification. Small hopper, bellows, catch cup, stepless adjustment and attributed retention claims. This is the seller-labelled V4, not a claim that every DF54 revision is identical. Checked 19 October 2026.
- Baratza GB, Encore ESP. Standard hopper capacity and product identity. Encore ESP, not Encore or Encore ESP Pro. Checked 19 October 2026.
- Baratza GB, single-dose hopper for conical-burr grinders. Stated loading method and explicit Encore ESP compatibility. Checked 19 October 2026.
- Baratza, Encore ESP operations manual, January 2023, version 1.0. Pages 5 to 7 cover settings, controls and beans before hopper removal; page 10 describes accumulated coffee and obstruction. Checked 19 October 2026.