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Precision Fill Mini: Modifying a Recipe

How to modify and dial in a Recipe on the Precision Fill Mini.

Selecting and Modifying a Recipe

On the Home Screen, tap the recipe name. You will get a list of recipes like below you can select from. You can also create new recipes or rename recipes using the information fount on page 8 of the Precision Fill Mini User Manual.

Once you have the recipe you want to modify selected, tap “Shortcut” to adjust the recipe values.

The variables in a recipe you can adjust are:

  • Target
  • Fast Speed
  • Medium Speed
  • Slow Speed

Key Characteristics:
The weight listed next to a feed is the weight difference from zero which will shut off that feed type. For example, take the recipe below (or the ones enter in your precision fill mini) 

  • Target: 340
  • Fast: 340
  • Med: 180
  • Slow: 12

Since the Fast Feed is set to the target weight, Fast Feed will not initiate and the machine will default to Med Feed. At 180g before the target weight (in this case, 160g in the weighing chamber), Med Feed will disengage and Slow Feed will stay active until 80g before the target weight. At 12g from target weight (meaning 328g is already measured by the load cell), all feeds will shut off and the coffee in the chute will enter the load cell.


Think about your Slow Feed value as a delay for all the coffee in the chute to enter the load cell. If you are consistently overshooting your Target, the delay is not long enough. Similarly, if you are consistently undershooting your Target, the delay is too long. This means you will use the Slow Feed to dial in your recipe output to match the target value.

Notes of the Med and Fast Adjustment

The ideal Fast and Med Feed values are the lowest values which provide consistent results. This will ensure the equipment is operating at maximum speed throughout the entire cycle.

Note the difference between a recipe being “off” and a recipe being “inconsistent;” a consistent recipe will always have a very similar output, regardless of whether or not that number is close to the target value. The first step of recipe creation is getting a stable value, regardless of whether that value is the Target weight or not. If the recipe produces inconsistent results (such as 336, 352, 348 on a 340g recipe), increase the Medium feed by 10 until the result is the same each time (such as 343, 344, 344 on a 340g recipe). Once you have a stable recipe, you can adjust Slow Feed to hit your target weight using this simple rule of thumb:

  • If you are over your target weight, increase the Slow value by the number of grams you are over.
  • If you If you are under your target weight, decrease the Slow value by the number of grams you are over.

Example Recipe

The recipe below is a step-by-step guide to create a 340g recipe.

Select the 340g recipe by tapping the open recipe name from the home screen,
then selecting 340g from the list. Then tap “Shortcut” to open the recipe values.
You should see this page (but with different values).

  1. Set Target Weight. Tap the text box next to "Target" and enter 340g. Tap OK.
  2. Set Fast Feed. Since fast feed is used primarily for recipes weighing more than 1000grams, we will not use Fast Feed on this recipe. Disable it by entering the target weight (340g) in the text box next to 'Fast Feed".
  3. Set Medium Feed. This number can be fine-tuned later. for now, we will just set it to 200g by taping the text box next to "Med Feed".
  4. Set Slow Feed. In order to demonstrate how to dial in a recipe, we will start with a value higher than necessary. Enter 25g in the text box next to 'Slow Feed'.
  5. Test Recipe. Return to the Home Screen. Ensure you have coffee in the hopper, your air compressor turned on, and a vessel below the outlet to catch discharged beans. Ten tap 'Start Running' in the lower right-hand corner. You should immediately hear the main valve open and the vibrators operating and see the weight indication start to rise.
  6. Check for consistency. Cycle the recipe three times. The amount the machine is weighing out is likely lower than your target value of 340g. Don't worry about that for now. Focus on whether the value is consistent after each cycle within plus or minus a gram of each other.
  7. Set medium feed. If your recipe produces a consistent result each time, you may be able to speed up the recipe. Decrease your medium value by 10 and run the machine for three cycles. If the results are consistent every time, continue decreasing the medium value by 10 and testing the recipe until the results become inconsistent. Then, increase the medium value by 10 this is your fastest, consistent medium feed value.
    1. If your results are not consistent over three filling cycles do the opposite increase your medium feed value by 10 until they are consistent. This also provides the fastest, consistent medium value.
  8. Fine tune slow feed: once you have found a consistent medium value, you can find tune the recipe to hit your target weight. Use the simple rule fund to adjust:
    1. If you're over your target weight, increase the slow value by the number of grams you're over.
    2. If you are under your target weight, decrease the low value by the number of grams you were over.
  9. Continue fine tuning: run the cycle a few more times. If needed, make additional slow for adjustments as described in the step above.

    1. The medium and slow berries would be similar for all recipes regardless of the target way. Each recipe may require some small adjustments, and note that very dense versus very light coffee (decaf vs peaberry) you may need two separate recipes.
  10. Fast feed: Fast feed is only used for recipes more than 1000 g. When setting up your first recipe with fast feed use the same medium and slow value from your 340 g recipe and start with a fast value of 900g. From there is the same step to use in 7 to adjust a medium feed, except for the fast value. It is generally pretty obvious if the fast value is too high or too low; if the value is too low, you'll get substantially more coffee than your target, and if it is too high, the recipe will take a long time to complete.

Take away for setting up recipe:

  • Medium feed will correct the problem of consistency. If you find a range of values larger than 4g in your target weight you have consistency problem.
  • Slow feed will correct a problem of accuracy for example if you are systematically hitting your target +10 g you have a problem with accuracy not consistency.
  • You can have both problems in which case you need to adjust both slow and medium feed settings start adjusting a medium feed until you achieve consistent portion sizes, then adjust slow feed settings to dial in your desired portion size.

Additional Notes

  • If coffee spills from the vibrator in the machine is not running
    • Ensure the machine is installed on a solid, vibration free surface
    • Tell the machine backwards by raising the two front legs of the machine until coffee stop spilling.
  • If the machine displays a weight different than what comes out of the machine, check the shipping box are removed. If you contact service at sub coffee.com for support, they will need photos of both sides of the machine as well as an image of the screw below the machine removed (as describing as assembly section step six).
  • If the machine says ADOFL when powered on contact of the service@sovdacoffee.com at the contact below and mention the machine says ADOFL on the screen.