{"@context":"https://schema.org","@type":"TechArticle","id":"TR-DOS-001","slug":"four-channel-dosing","canonical_url":"https://flavorotor.com/research/four-channel-dosing","machine_readable_url":"https://flavorotor.com/research/data/chapters/four-channel-dosing.json","markdown_url":"https://flavorotor.com/research/markdown/four-channel-dosing","title":"Four-channel nutrient dosing module","description":"Independent fluid channels, channel identity, mixing logic and the separation between dosing a stock solution and producing a plant sensory outcome.","chapter":"Nutrient dosing","version":"1.1","updated":"2026-07-26","table_of_contents":[{"id":"plain","label":"Explanation"},{"id":"architecture","label":"Architecture"},{"id":"assignment","label":"Safe channel definition"},{"id":"traceability","label":"Dose traceability"},{"id":"provenance","label":"FlavoRotor design provenance"},{"id":"module-interior","label":"Module interior"}],"html":"
In brief

Independent fluid channels, channel identity, mixing logic and the separation between dosing a stock solution and producing a plant sensory outcome.

\"Four-channel
System integration.Original pump-package CAD.
\"Interior
Four independent fluid channels.Original pump-package CAD. Channel assignment is recipe-defined and requires independent calibration.
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Explanation

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Four pumps allow four liquids to be added independently. The channels control liquid volumes. They do not directly control sweetness, acidity or aroma.

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Architecture

The documented motor-control architecture uses STEP/DIR microstepping drivers of the A4988 class. Driver selection defines command generation and protection requirements; it does not determine pump volumetric accuracy.

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Stock 1–4→Calibrated channel→Injection point→Mixing delay→Reservoir measurement
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Safe channel definition

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ChannelPermitted roleRequired metadata
1water or defined stockfluid ID, batch and density
2nutrient stock Afull chemical composition and compatibility class
3nutrient stock Bfull chemical composition and compatibility class
4correction or experimental stockpurpose, maximum dose and exclusion rules
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Dose traceability

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event_id, timestamp, system_id, recipe_id, recipe_version,\nchannel_id, fluid_id, fluid_batch, calibration_id,\nrequested_volume_mL, commanded_steps, speed_rpm, direction,\nreservoir_volume_before_L, pH_before, EC_before, temperature_before,\nmixing_delay_s, pH_after, EC_after, fault_state
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FlavoRotor design provenance

The system-specific configuration on this page is traced to the supplied FlavoRotor engineering records.

Module interior

\"Interior
Module interior.Original internal CAD image. It documents channel packaging; delivered volume and cross-channel isolation remain validation items.
","text":"In brief Independent fluid channels, channel identity, mixing logic and the separation between dosing a stock solution and producing a plant sensory outcome. System integration. Original pump-package CAD. [I03] Four independent fluid channels. Original pump-package CAD. Channel assignment is recipe-defined and requires independent calibration. [I03] Explanation Four pumps allow four liquids to be added independently. The channels control liquid volumes. They do not directly control sweetness, acidity or aroma. Architecture The documented motor-control architecture uses STEP/DIR microstepping drivers of the A4988 class. Driver selection defines command generation and protection requirements; it does not determine pump volumetric accuracy. [R44] Stock 1–4 → Calibrated channel → Injection point → Mixing delay → Reservoir measurement Safe channel definition Channel Permitted role Required metadata 1 water or defined stock fluid ID, batch and density 2 nutrient stock A full chemical composition and compatibility class 3 nutrient stock B full chemical composition and compatibility class 4 correction or experimental stock purpose, maximum dose and exclusion rules Measurement rule A channel labelled K, N or Ca still changes multiple chemical and physiological variables. Any sensory outcome is established only by a controlled crop trial. Dose traceability event_id, timestamp, system_id, recipe_id, recipe_version, channel_id, fluid_id, fluid_batch, calibration_id, requested_volume_mL, commanded_steps, speed_rpm, direction, reservoir_volume_before_L, pH_before, EC_before, temperature_before, mixing_delay_s, pH_after, EC_after, fault_state FlavoRotor design provenance The system-specific configuration on this page is traced to the supplied FlavoRotor engineering records. [I02] [I03] Module interior Module interior. Original internal CAD image. It documents channel packaging; delivered volume and cross-channel isolation remain validation items. [I03]","source_ids":["I02","I03","R44"],"visuals":[],"sources":[{"id":"I02","authors":"FlavoRotor project team","year":2026,"title":"FlavoRotor v2.0 system architecture","publication":"Internal engineering design report","doi":null,"url":"/research/platform","source_type":"internal primary record","relevance":"Documents the proposed magnetic drive, axial lighting, four-channel peristaltic dosing and imaging architecture.","verification":"Derived from the original FlavoRotor v2.0 engineering document","verified_on":"2026-07-26","verification_status":"INTERNAL PRIMARY RECORD","verified_against":"Original internal project file and extracted media"},{"id":"I03","authors":"FlavoRotor project team","year":2026,"title":"FlavoRotor peristaltic pump technical record","publication":"Internal engineering record","doi":null,"url":"/research/peristaltic-pump","source_type":"internal primary record","relevance":"Documents CAD geometry, components, first-order equations, four-channel integration and the proposed calibration protocol.","verification":"Derived from the original FlavoRotor pump engineering package","verified_on":"2026-07-26","verification_status":"INTERNAL PRIMARY RECORD","verified_against":"Original internal project file and extracted media"},{"id":"R44","authors":"Allegro MicroSystems","year":2010,"title":"A4988 DMOS Microstepping Driver with Translator and Overcurrent Protection","publication":"Official component documentation","doi":null,"url":"https://www.allegromicro.com/en/products/motor-drivers/brush-dc-motor-drivers/a4988","source_type":"official component documentation","relevance":"Confirms supported microstep command modes and electrical protection features of the proposed driver.","verification":"Official Allegro product record and 2010 device-family release checked 2026-07-27","verified_on":"2026-07-27","verification_status":"OFFICIAL TECHNICAL RECORD CHECKED","verified_against":"Allegro MicroSystems product page and manufacturer release"}]}