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Fix FILAMENT_WIDTH_SENSOR measurement

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Only measure and store filament width when E is going forward.
This commit is contained in:
Scott Lahteine
2016-04-06 19:29:08 -07:00
parent 74effedbf5
commit 865dcf3fb4
4 changed files with 31 additions and 24 deletions
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37
Marlin/planner.cpp
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@@ -852,25 +852,34 @@ float junction_deviation = 0.1;
block->nominal_rate = ceil(block->step_event_count * inverse_second); // (step/sec) Always > 0
#if ENABLED(FILAMENT_WIDTH_SENSOR)
static float filwidth_e_count = 0, filwidth_delay_dist = 0;
//FMM update ring buffer used for delay with filament measurements
if (extruder == FILAMENT_SENSOR_EXTRUDER_NUM && delay_index2 > -1) { //only for extruder with filament sensor and if ring buffer is initialized
if (extruder == FILAMENT_SENSOR_EXTRUDER_NUM && filwidth_delay_index2 >= 0) { //only for extruder with filament sensor and if ring buffer is initialized
const int MMD = MAX_MEASUREMENT_DELAY + 1, MMD10 = MMD * 10;
const int MMD_CM = MAX_MEASUREMENT_DELAY + 1, MMD_MM = MMD_CM * 10;
delay_dist += delta_mm[E_AXIS]; // increment counter with next move in e axis
while (delay_dist >= MMD10) delay_dist -= MMD10; // loop around the buffer
while (delay_dist < 0) delay_dist += MMD10;
// increment counters with next move in e axis
filwidth_e_count += delta_mm[E_AXIS];
filwidth_delay_dist += delta_mm[E_AXIS];
delay_index1 = delay_dist / 10.0; // calculate index
delay_index1 = constrain(delay_index1, 0, MAX_MEASUREMENT_DELAY); // (already constrained above)
// Only get new measurements on forward E movement
if (filwidth_e_count > 0.0001) {
if (delay_index1 != delay_index2) { // moved index
int8_t meas_sample = widthFil_to_size_ratio() - 100; // Subtract 100 to reduce magnitude - to store in a signed char
while (delay_index1 != delay_index2) {
// Increment and loop around buffer
if (++delay_index2 >= MMD) delay_index2 -= MMD;
delay_index2 = constrain(delay_index2, 0, MAX_MEASUREMENT_DELAY);
measurement_delay[delay_index2] = meas_sample;
// Loop the delay distance counter (modulus by the mm length)
while (filwidth_delay_dist >= MMD_MM) filwidth_delay_dist -= MMD_MM;
// Convert into an index into the measurement array
filwidth_delay_index1 = (int)(filwidth_delay_dist / 10.0 + 0.0001);
// If the index has changed (must have gone forward)...
if (filwidth_delay_index1 != filwidth_delay_index2) {
filwidth_e_count = 0; // Reset the E movement counter
int8_t meas_sample = widthFil_to_size_ratio() - 100; // Subtract 100 to reduce magnitude - to store in a signed char
do {
filwidth_delay_index2 = (filwidth_delay_index2 + 1) % MMD_CM; // The next unused slot
measurement_delay[filwidth_delay_index2] = meas_sample; // Store the measurement
} while (filwidth_delay_index1 != filwidth_delay_index2); // More slots to fill?
}
}
}