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if deviation between current Z-probe and avg, value > 50um, enlarge Z-probe movements and repeat measurement

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This commit is contained in:
PavelSindler 2019-03-27 20:25:00 +01:00
parent a9ce38df71
commit 5863297538
1 changed files with 16 additions and 5 deletions
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21
Firmware/mesh_bed_calibration.cpp
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@ -945,6 +945,7 @@ inline bool find_bed_induction_sensor_point_z(float minimum_z, uint8_t n_iter, i
#endif //SUPPORT_VERBOSITY
)
{
bool high_deviation_occured = false;
#ifdef TMC2130
FORCE_HIGH_POWER_START;
#endif
@ -977,12 +978,12 @@ inline bool find_bed_induction_sensor_point_z(float minimum_z, uint8_t n_iter, i
for (uint8_t i = 0; i < n_iter; ++ i)
{
current_position[Z_AXIS] += 0.2;
current_position[Z_AXIS] += high_deviation_occured ? 0.5 : 0.2;
float z_bckp = current_position[Z_AXIS];
go_to_current(homing_feedrate[Z_AXIS]/60);
// Move back down slowly to find bed.
current_position[Z_AXIS] = minimum_z;
printf_P(PSTR("init Z = %f, min_z = %f\n"), z_bckp, minimum_z);
printf_P(PSTR("init Z = %f, min_z = %f, i = %d\n"), z_bckp, minimum_z, i);
go_to_current(homing_feedrate[Z_AXIS]/(4*60));
// we have to let the planner know where we are right now as it is not where we said to go.
update_current_position_z();
@ -1016,9 +1017,19 @@ inline bool find_bed_induction_sensor_point_z(float minimum_z, uint8_t n_iter, i
float dz = i?abs(current_position[Z_AXIS] - (z / i)):0;
z += current_position[Z_AXIS];
//printf_P(PSTR("Z[%d] = %d, dz=%d\n"), i, (int)(current_position[Z_AXIS] * 1000), (int)(dz * 1000));
if (dz > 0.05) {
printf_P(PSTR("big deviation \n"));
goto error;//deviation > 50um
printf_P(PSTR("Z- measurement deviation from avg value %f um\n"), dz);
if (dz > 0.05) { //deviation > 50um
if (high_deviation_occured == false) { //first occurence may be caused in some cases by mechanic resonance probably especially if printer is placed on unstable surface
printf_P(PSTR("high dev. first occurence\n"));
delay_keep_alive(500); //damping
//start measurement from the begining, but this time with higher movements in Z axis which should help to reduce mechanical resonance
high_deviation_occured = true;
i = -1;
z = 0;
}
else {
goto error;
}
}
printf_P(PSTR("PINDA triggered at %f\n"), current_position[Z_AXIS]);
}