LMD 9-8 v1.5

Designed for medium to medium-dark beans, the goal is to optimize for even extraction while minimizing the overextraction that can be common with darker beans. This is done by transitioning from a pressure target to a flow target during extraction.

SproFiler.io example shot

Shot Prep:

• standard 20 g basket (not HE)
• 19 g (should work from ~18-20 g; adjust stop-on-weight as needed)

Main targets:

• PI: Flow driven until 2 bar
• Soak: Short soak to not over-extract, transitions after 6 sec or less based on weight & pressure drop
• Extraction: Climb to 9 bar over 5 sec, decrease 1 bar over 4 sec, then transition to flow defined profile as the puck grind allows (pressure should ramp down). After 10 seconds, or if pressure drops 3 bar, the flow increases to finish the shot.
• Weight: 38 g stop-on-weight, 1:2 ratio

Notes:

• There are some "save the shot" transition parameters defined (e.g. a gram or two in the cup during PI and/or Soak will move the profile on to extraction). If a phase is skipped or short one of those was likely triggered. v1.5 adds an initial phase so that the shot will run even if pressure release was missed.
• The 9-8 bar results in more crema than desired with some beans; in that case bumping extraction pressure limits down 1 bar can help.
• A pre-made LMD 8-7 and more dialing guidance can be found on Discord