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Filament Width Sensor - Incorrect ADC->MM Calculation Fix #23977

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merged 2 commits into from
Apr 1, 2022
Merged

Filament Width Sensor - Incorrect ADC->MM Calculation Fix #23977

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ab680d6
Use HAL_ADC_VREF instead of 5.0v for filament width ADC
manianac Mar 31, 2022
d38036e
Use ADC_VREF
thinkyhead Apr 1, 2022
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2 changes: 1 addition & 1 deletion Marlin/src/feature/filwidth.h
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Original file line number Diff line number Diff line change
Expand Up @@ -67,7 +67,7 @@ class FilamentWidthSensor {
}

// Convert raw measurement to mm
static float raw_to_mm(const uint16_t v) { return v * 5.0f * RECIPROCAL(float(MAX_RAW_THERMISTOR_VALUE)); }
static float raw_to_mm(const uint16_t v) { return v * float(ADC_VREF) * RECIPROCAL(float(MAX_RAW_THERMISTOR_VALUE)); }
static float raw_to_mm() { return raw_to_mm(raw); }

// A scaled reading is ready
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