148 lines
4.9 KiB
C++
148 lines
4.9 KiB
C++
/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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#pragma once
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#include "../inc/MarlinConfig.h"
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enum TempSensorID : uint8_t {
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TSI_PROBE,
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TSI_BED,
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#if ENABLED(USE_TEMP_EXT_COMPENSATION)
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TSI_EXT,
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#endif
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TSI_COUNT
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};
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typedef struct {
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uint8_t measurements; // Max. number of measurements to be stored (35 - 80°C)
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celsius_t temp_res, // Resolution in °C between measurements
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start_temp, // Base measurement; z-offset == 0
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end_temp;
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} temp_calib_t;
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/**
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* Probe temperature compensation implementation.
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* Z-probes like the P.I.N.D.A V2 allow for compensation of
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* measurement errors/shifts due to changed temperature.
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*/
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// Probe temperature calibration constants
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#ifndef PTC_SAMPLE_COUNT
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#define PTC_SAMPLE_COUNT 10
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#endif
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#ifndef PTC_SAMPLE_RES
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#define PTC_SAMPLE_RES 5
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#endif
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#ifndef PTC_SAMPLE_START
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#define PTC_SAMPLE_START 30
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#endif
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#define PTC_SAMPLE_END (PTC_SAMPLE_START + (PTC_SAMPLE_COUNT) * PTC_SAMPLE_RES)
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// Bed temperature calibration constants
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#ifndef BTC_PROBE_TEMP
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#define BTC_PROBE_TEMP 30
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#endif
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#ifndef BTC_SAMPLE_COUNT
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#define BTC_SAMPLE_COUNT 10
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#endif
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#ifndef BTC_SAMPLE_RES
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#define BTC_SAMPLE_RES 5
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#endif
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#ifndef BTC_SAMPLE_START
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#define BTC_SAMPLE_START 60
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#endif
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#define BTC_SAMPLE_END (BTC_SAMPLE_START + (BTC_SAMPLE_COUNT) * BTC_SAMPLE_RES)
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#ifndef PTC_PROBE_HEATING_OFFSET
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#define PTC_PROBE_HEATING_OFFSET 0.5f
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#endif
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#ifndef PTC_PROBE_RAISE
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#define PTC_PROBE_RAISE 10
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#endif
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static constexpr temp_calib_t cali_info_init[TSI_COUNT] = {
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{ PTC_SAMPLE_COUNT, PTC_SAMPLE_RES, PTC_SAMPLE_START, PTC_SAMPLE_END }, // Probe
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{ BTC_SAMPLE_COUNT, BTC_SAMPLE_RES, BTC_SAMPLE_START, BTC_SAMPLE_END }, // Bed
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#if ENABLED(USE_TEMP_EXT_COMPENSATION)
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{ 20, 5, 180, 180 + 5 * 20 } // Extruder
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#endif
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};
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class ProbeTempComp {
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public:
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static const temp_calib_t cali_info[TSI_COUNT];
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// Where to park nozzle to wait for probe cooldown
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static constexpr xyz_pos_t park_point = PTC_PARK_POS;
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// XY coordinates of nozzle for probing the bed
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static constexpr xy_pos_t measure_point = PTC_PROBE_POS; // Coordinates to probe
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//measure_point = { 12.0f, 7.3f }; // Coordinates for the MK52 magnetic heatbed
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static constexpr celsius_t probe_calib_bed_temp = BED_MAX_TARGET, // Bed temperature while calibrating probe
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bed_calib_probe_temp = BTC_PROBE_TEMP; // Probe temperature while calibrating bed
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static int16_t *sensor_z_offsets[TSI_COUNT],
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z_offsets_probe[cali_info_init[TSI_PROBE].measurements], // (µm)
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z_offsets_bed[cali_info_init[TSI_BED].measurements]; // (µm)
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#if ENABLED(USE_TEMP_EXT_COMPENSATION)
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static int16_t z_offsets_ext[cali_info_init[TSI_EXT].measurements]; // (µm)
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#endif
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static inline void reset_index() { calib_idx = 0; };
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static inline uint8_t get_index() { return calib_idx; }
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static void clear_offsets(const TempSensorID tsi);
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static inline void clear_all_offsets() {
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clear_offsets(TSI_BED);
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clear_offsets(TSI_PROBE);
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TERN_(USE_TEMP_EXT_COMPENSATION, clear_offsets(TSI_EXT));
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}
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static bool set_offset(const TempSensorID tsi, const uint8_t idx, const int16_t offset);
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static void print_offsets();
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static void prepare_new_calibration(const_float_t init_meas_z);
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static void push_back_new_measurement(const TempSensorID tsi, const_float_t meas_z);
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static bool finish_calibration(const TempSensorID tsi);
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static void compensate_measurement(const TempSensorID tsi, const celsius_t temp, float &meas_z);
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private:
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static uint8_t calib_idx;
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/**
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* Base value. Temperature compensation values will be deltas
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* to this value, set at first probe.
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*/
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static float init_measurement;
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static float get_offset_for_temperature(const TempSensorID tsi, const celsius_t temp);
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/**
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* Fit a linear function in measured temperature offsets
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* to allow generating values of higher temperatures.
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*/
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static bool linear_regression(const TempSensorID tsi, float &k, float &d);
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};
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extern ProbeTempComp temp_comp;
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