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Prettify LIN_ADVANCE code with the positive condition

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Scott Lahteine 2016-12-08 22:52:48 -08:00
parent 1929502e15
commit fc2fc828b3
1 changed files with 21 additions and 15 deletions
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36
Marlin/planner.cpp
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@ -1293,22 +1293,28 @@ void Planner::_buffer_line(const float &a, const float &b, const float &c, const
#if ENABLED(LIN_ADVANCE)
// Don't use LIN_ADVANCE for blocks if:
// !block->steps[E_AXIS]: We don't have E steps todo (Travel move)
// !block->steps[X_AXIS] && !block->steps[Y_AXIS]: We don't have a movement in XY direction (Retract / Prime moves)
// extruder_advance_k == 0.0: There is no advance factor set
// block->steps[E_AXIS] == block->step_event_count: A problem occurs when there's a very tiny move before a retract.
// In this case, the retract and the move will be executed together.
// This leads to an enormous number of advance steps due to a huge e_acceleration.
// The math is correct, but you don't want a retract move done with advance!
// de_float <= 0.0: Extruder is running in reverse direction (for example during "Wipe while retracting" (Slic3r) or "Combing" (Cura) movements)
if (!esteps || (!block->steps[X_AXIS] && !block->steps[Y_AXIS]) || extruder_advance_k == 0.0 || (uint32_t)esteps == block->step_event_count || de_float <= 0.0) {
block->use_advance_lead = false;
}
else {
block->use_advance_lead = true;
//
// Use LIN_ADVANCE for blocks if all these are true:
//
// esteps : We have E steps todo (a printing move)
//
// block->steps[X_AXIS] || block->steps[Y_AXIS] : We have a movement in XY direction (i.e., not retract / prime).
//
// extruder_advance_k : There is an advance factor set.
//
// block->steps[E_AXIS] != block->step_event_count : A problem occurs if the move before a retract is too small.
// In that case, the retract and move will be executed together.
// This leads to too many advance steps due to a huge e_acceleration.
// The math is good, but we must avoid retract moves with advance!
// de_float > 0.0 : Extruder is running forward (e.g., for "Wipe while retracting" (Slic3r) or "Combing" (Cura) moves)
//
block->use_advance_lead = esteps
&& (block->steps[X_AXIS] || block->steps[Y_AXIS])
&& extruder_advance_k
&& (uint32_t)esteps != block->step_event_count
&& de_float > 0.0;
if (block->use_advance_lead)
block->abs_adv_steps_multiplier8 = lround(extruder_advance_k * (de_float / mm_D_float) * block->nominal_speed / (float)block->nominal_rate * axis_steps_per_mm[E_AXIS_N] * 256.0);
}
#elif ENABLED(ADVANCE)