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Code Issues Releases Wiki Activity

🐛 Fix G2/G3 Arcs stutter / JD speed (#24362)

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tombrazier 2022-06-18 05:17:12 +01:00 committed by Scott Lahteine
parent 106537ff43
commit 0523874e9c
1 changed files with 101 additions and 104 deletions
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57
Marlin/src/gcode/motion/G2_G3.cpp
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@ -197,8 +197,8 @@ void plan_arc(
// Feedrate for the move, scaled by the feedrate multiplier
const feedRate_t scaled_fr_mm_s = MMS_SCALED(feedrate_mm_s);
// Get the nominal segment length based on settings
const float nominal_segment_mm = (
// Get the ideal segment length for the move based on settings
const float ideal_segment_mm = (
#if ARC_SEGMENTS_PER_SEC // Length based on segments per second and feedrate
constrain(scaled_fr_mm_s * RECIPROCAL(ARC_SEGMENTS_PER_SEC), MIN_ARC_SEGMENT_MM, MAX_ARC_SEGMENT_MM)
#else
@ -206,19 +206,18 @@ void plan_arc(
#endif
);
// Number of whole segments based on the nominal segment length
const float nominal_segments = _MAX(FLOOR(flat_mm / nominal_segment_mm), min_segments);
// Number of whole segments based on the ideal segment length
const float nominal_segments = _MAX(FLOOR(flat_mm / ideal_segment_mm), min_segments),
nominal_segment_mm = flat_mm / nominal_segments;
// A new segment length based on the required minimum
const float segment_mm = constrain(flat_mm / nominal_segments, MIN_ARC_SEGMENT_MM, MAX_ARC_SEGMENT_MM);
// The number of whole segments in the arc, with best attempt to honor MIN_ARC_SEGMENT_MM and MAX_ARC_SEGMENT_MM
const uint16_t segments = nominal_segment_mm > (MAX_ARC_SEGMENT_MM) ? CEIL(flat_mm / (MAX_ARC_SEGMENT_MM)) :
nominal_segment_mm < (MIN_ARC_SEGMENT_MM) ? _MAX(1, FLOOR(flat_mm / (MIN_ARC_SEGMENT_MM))) :
nominal_segments;
// The number of whole segments in the arc, ignoring the remainder
uint16_t segments = FLOOR(flat_mm / segment_mm);
// Are the segments now too few to reach the destination?
const float segmented_length = segment_mm * segments;
const bool tooshort = segmented_length < flat_mm - 0.0001f;
const float proportion = tooshort ? segmented_length / flat_mm : 1.0f;
#if ENABLED(SCARA_FEEDRATE_SCALING)
const float inv_duration = (scaled_fr_mm_s / flat_mm) * segments;
#endif
/**
* Vector rotation by transformation matrix: r is the original vector, r_T is the rotated vector,
@ -246,29 +245,30 @@ void plan_arc(
* a correction, the planner should have caught up to the lag caused by the initial plan_arc overhead.
* This is important when there are successive arc motions.
*/
// Vector rotation matrix values
xyze_pos_t raw;
const float theta_per_segment = proportion * angular_travel / segments,
// do not calculate rotation parameters for trivial single-segment arcs
if (segments > 1) {
// Vector rotation matrix values
const float theta_per_segment = angular_travel / segments,
sq_theta_per_segment = sq(theta_per_segment),
sin_T = theta_per_segment - sq_theta_per_segment * theta_per_segment / 6,
cos_T = 1 - 0.5f * sq_theta_per_segment; // Small angle approximation
#if DISABLED(AUTO_BED_LEVELING_UBL)
ARC_LIJKUVW_CODE(
const float per_segment_L = proportion * travel_L / segments,
const float per_segment_I = proportion * travel_I / segments,
const float per_segment_J = proportion * travel_J / segments,
const float per_segment_K = proportion * travel_K / segments,
const float per_segment_U = proportion * travel_U / segments,
const float per_segment_V = proportion * travel_V / segments,
const float per_segment_W = proportion * travel_W / segments
const float per_segment_L = travel_L / segments,
const float per_segment_I = travel_I / segments,
const float per_segment_J = travel_J / segments,
const float per_segment_K = travel_K / segments,
const float per_segment_U = travel_U / segments,
const float per_segment_V = travel_V / segments,
const float per_segment_W = travel_W / segments
);
#endif
CODE_ITEM_E(const float extruder_per_segment = proportion * travel_E / segments);
// For shortened segments, run all but the remainder in the loop
if (tooshort) segments++;
CODE_ITEM_E(const float extruder_per_segment = travel_E / segments);
// Initialize all linear axes and E
ARC_LIJKUVWE_CODE(
@ -282,10 +282,6 @@ void plan_arc(
raw.e = current_position.e
);
#if ENABLED(SCARA_FEEDRATE_SCALING)
const float inv_duration = scaled_fr_mm_s / segment_mm;
#endif
millis_t next_idle_ms = millis() + 200UL;
#if N_ARC_CORRECTION > 1
@ -349,6 +345,7 @@ void plan_arc(
if (!planner.buffer_line(raw, scaled_fr_mm_s, active_extruder, 0 OPTARG(SCARA_FEEDRATE_SCALING, inv_duration)))
break;
}
}
// Ensure last segment arrives at target location.
raw = cart;