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Replace some float division with multiplication

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This commit is contained in:
Scott Lahteine
2016-07-24 11:50:54 -07:00
parent ddde785b37
commit d8f2876753
5 changed files with 20 additions and 18 deletions
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8
Marlin/temperature.cpp
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@ -319,13 +319,13 @@ unsigned char Temperature::soft_pwm[HOTENDS];
SERIAL_PROTOCOLPAIR(MSG_T_MIN, min);
SERIAL_PROTOCOLPAIR(MSG_T_MAX, max);
if (cycles > 2) {
Ku = (4.0 * d) / (3.14159265 * (max - min) / 2.0);
Tu = ((float)(t_low + t_high) / 1000.0);
Ku = (4.0 * d) / (3.14159265 * (max - min) * 0.5);
Tu = ((float)(t_low + t_high) * 0.001);
SERIAL_PROTOCOLPAIR(MSG_KU, Ku);
SERIAL_PROTOCOLPAIR(MSG_TU, Tu);
workKp = 0.6 * Ku;
workKi = 2 * workKp / Tu;
workKd = workKp * Tu / 8;
workKd = workKp * Tu * 0.125;
SERIAL_PROTOCOLLNPGM(MSG_CLASSIC_PID);
SERIAL_PROTOCOLPAIR(MSG_KP, workKp);
SERIAL_PROTOCOLPAIR(MSG_KI, workKi);
@ -753,7 +753,7 @@ void Temperature::manage_heater() {
// Get the delayed info and add 100 to reconstitute to a percent of
// the nominal filament diameter then square it to get an area
meas_shift_index = constrain(meas_shift_index, 0, MAX_MEASUREMENT_DELAY);
float vm = pow((measurement_delay[meas_shift_index] + 100.0) / 100.0, 2);
float vm = pow((measurement_delay[meas_shift_index] + 100.0) * 0.01, 2);
NOLESS(vm, 0.01);
volumetric_multiplier[FILAMENT_SENSOR_EXTRUDER_NUM] = vm;
}