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@ -474,20 +474,10 @@
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set_current_to_destination();
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}
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#ifdef UBL_DELTA
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#define COPY_XYZE( target, source ) { \
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target[X_AXIS] = source[X_AXIS]; \
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target[Y_AXIS] = source[Y_AXIS]; \
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target[Z_AXIS] = source[Z_AXIS]; \
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target[E_AXIS] = source[E_AXIS]; \
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}
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#if UBL_DELTA
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#if IS_SCARA // scale the feed rate from mm/s to degrees/s
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static float scara_feed_factor;
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static float scara_oldA;
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static float scara_oldB;
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static float scara_feed_factor, scara_oldA, scara_oldB;
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#endif
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// We don't want additional apply_leveling() performed by regular buffer_line or buffer_line_kinematic,
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@ -501,18 +491,18 @@
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float feedrate = fr_mm_s;
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#if IS_SCARA // scale the feed rate from mm/s to degrees/s
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float adiff = abs(delta[A_AXIS] - scara_oldA);
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float bdiff = abs(delta[B_AXIS] - scara_oldB);
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float adiff = abs(delta[A_AXIS] - scara_oldA),
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bdiff = abs(delta[B_AXIS] - scara_oldB);
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scara_oldA = delta[A_AXIS];
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scara_oldB = delta[B_AXIS];
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feedrate = max(adiff, bdiff) * scara_feed_factor;
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#endif
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planner._buffer_line( delta[A_AXIS], delta[B_AXIS], delta[C_AXIS], ltarget[E_AXIS], feedrate, extruder );
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planner._buffer_line(delta[A_AXIS], delta[B_AXIS], delta[C_AXIS], ltarget[E_AXIS], feedrate, extruder);
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#else // cartesian
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planner._buffer_line( ltarget[X_AXIS], ltarget[Y_AXIS], ltarget[Z_AXIS], ltarget[E_AXIS], fr_mm_s, extruder );
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planner._buffer_line(ltarget[X_AXIS], ltarget[Y_AXIS], ltarget[Z_AXIS], ltarget[E_AXIS], fr_mm_s, extruder);
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#endif
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}
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@ -525,7 +515,7 @@
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static bool ubl_prepare_linear_move_to(const float ltarget[XYZE], const float &feedrate) {
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if ( ! position_is_reachable_xy( ltarget[X_AXIS], ltarget[Y_AXIS] )) // fail if moving outside reachable boundary
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if (!position_is_reachable_xy(ltarget[X_AXIS], ltarget[Y_AXIS])) // fail if moving outside reachable boundary
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return true; // did not move, so current_position still accurate
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const float difference[XYZE] = { // cartesian distances moved in XYZE
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@ -533,21 +523,21 @@
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ltarget[Y_AXIS] - current_position[Y_AXIS],
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ltarget[Z_AXIS] - current_position[Z_AXIS],
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ltarget[E_AXIS] - current_position[E_AXIS]
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};
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};
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float cartesian_xy_mm = sqrtf( sq(difference[X_AXIS]) + sq(difference[Y_AXIS]) ); // total horizontal xy distance
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const float cartesian_xy_mm = HYPOT(difference[X_AXIS], difference[Y_AXIS]); // total horizontal xy distance
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#if IS_KINEMATIC
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float seconds = cartesian_xy_mm / feedrate; // seconds to move xy distance at requested rate
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uint16_t segments = lroundf( delta_segments_per_second * seconds ); // preferred number of segments for distance @ feedrate
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uint16_t seglimit = lroundf( cartesian_xy_mm * (1.0/(DELTA_SEGMENT_MIN_LENGTH))); // number of segments at minimum segment length
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NOMORE( segments, seglimit ); // limit to minimum segment length (fewer segments)
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const float seconds = cartesian_xy_mm / feedrate; // seconds to move xy distance at requested rate
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uint16_t segments = lroundf(delta_segments_per_second * seconds), // preferred number of segments for distance @ feedrate
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seglimit = lroundf(cartesian_xy_mm * (1.0 / (DELTA_SEGMENT_MIN_LENGTH))); // number of segments at minimum segment length
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NOMORE(segments, seglimit); // limit to minimum segment length (fewer segments)
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#else
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uint16_t segments = lroundf( cartesian_xy_mm * (1.0/(DELTA_SEGMENT_MIN_LENGTH))); // cartesian fixed segment length
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uint16_t segments = lroundf(cartesian_xy_mm * (1.0 / (DELTA_SEGMENT_MIN_LENGTH))); // cartesian fixed segment length
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#endif
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NOLESS( segments, 1 ); // must have at least one segment
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float inv_segments = 1.0 / segments; // divide once, multiply thereafter
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NOLESS(segments, 1); // must have at least one segment
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const float inv_segments = 1.0 / segments; // divide once, multiply thereafter
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#if IS_SCARA // scale the feed rate from mm/s to degrees/s
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scara_feed_factor = cartesian_xy_mm * inv_segments * feedrate;
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@ -560,57 +550,53 @@
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difference[Y_AXIS] * inv_segments,
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difference[Z_AXIS] * inv_segments,
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difference[E_AXIS] * inv_segments
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};
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};
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// Note that E segment distance could vary slightly as z mesh height
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// changes for each segment, but small enough to ignore.
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bool above_fade_height = false;
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#if ENABLED(ENABLE_LEVELING_FADE_HEIGHT)
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if (( planner.z_fade_height != 0 ) &&
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( planner.z_fade_height < RAW_Z_POSITION(ltarget[Z_AXIS]) )) {
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above_fade_height = true;
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}
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#endif
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const bool above_fade_height = (
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#if ENABLED(ENABLE_LEVELING_FADE_HEIGHT)
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planner.z_fade_height != 0 && planner.z_fade_height < RAW_Z_POSITION(ltarget[Z_AXIS])
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#else
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false
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#endif
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);
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// Only compute leveling per segment if ubl active and target below z_fade_height.
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if (( ! ubl.state.active ) || ( above_fade_height )) { // no mesh leveling
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if (!ubl.state.active || above_fade_height) { // no mesh leveling
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const float z_offset = ubl.state.active ? ubl.state.z_offset : 0.0;
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float seg_dest[XYZE]; // per-segment destination,
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COPY_XYZE( seg_dest, current_position ); // starting from current position
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float seg_dest[XYZE]; // per-segment destination,
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COPY(seg_dest, current_position); // starting from current position
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while (--segments) {
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LOOP_XYZE(i) seg_dest[i] += segment_distance[i];
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float ztemp = seg_dest[Z_AXIS];
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seg_dest[Z_AXIS] += z_offset;
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ubl_buffer_line_segment( seg_dest, feedrate, active_extruder );
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ubl_buffer_line_segment(seg_dest, feedrate, active_extruder);
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seg_dest[Z_AXIS] = ztemp;
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}
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// Since repeated adding segment_distance accumulates small errors, final move to exact destination.
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COPY_XYZE( seg_dest, ltarget );
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COPY(seg_dest, ltarget);
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seg_dest[Z_AXIS] += z_offset;
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ubl_buffer_line_segment( seg_dest, feedrate, active_extruder );
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ubl_buffer_line_segment(seg_dest, feedrate, active_extruder);
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return false; // moved but did not set_current_to_destination();
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}
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// Otherwise perform per-segment leveling
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#if ENABLED(ENABLE_LEVELING_FADE_HEIGHT)
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float fade_scaling_factor = ubl.fade_scaling_factor_for_z(ltarget[Z_AXIS]);
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#endif
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float seg_dest[XYZE]; // per-segment destination, initialize to first segment
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LOOP_XYZE(i) seg_dest[i] = current_position[i] + segment_distance[i];
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const float& dx_seg = segment_distance[X_AXIS]; // alias for clarity
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const float& dy_seg = segment_distance[Y_AXIS];
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float rx = RAW_X_POSITION(seg_dest[X_AXIS]); // assume raw vs logical coordinates shifted but not scaled.
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float ry = RAW_Y_POSITION(seg_dest[Y_AXIS]);
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float rx = RAW_X_POSITION(seg_dest[X_AXIS]), // assume raw vs logical coordinates shifted but not scaled.
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ry = RAW_Y_POSITION(seg_dest[Y_AXIS]);
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do { // for each mesh cell encountered during the move
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@ -621,74 +607,75 @@
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// in top of loop and again re-find same adjacent cell and use it, just less efficient
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// for mesh inset area.
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int8_t cell_xi = (rx - (UBL_MESH_MIN_X)) * (1.0 / (MESH_X_DIST));
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cell_xi = constrain( cell_xi, 0, (GRID_MAX_POINTS_X) - 1 );
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int8_t cell_xi = (rx - (UBL_MESH_MIN_X)) * (1.0 / (MESH_X_DIST)),
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cell_yi = (ry - (UBL_MESH_MIN_Y)) * (1.0 / (MESH_X_DIST));
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int8_t cell_yi = (ry - (UBL_MESH_MIN_Y)) * (1.0 / (MESH_X_DIST));
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cell_yi = constrain( cell_yi, 0, (GRID_MAX_POINTS_Y) - 1 );
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cell_xi = constrain(cell_xi, 0, (GRID_MAX_POINTS_X) - 1);
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cell_yi = constrain(cell_yi, 0, (GRID_MAX_POINTS_Y) - 1);
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// float x0 = (UBL_MESH_MIN_X) + ((MESH_X_DIST) * cell_xi ); // lower left cell corner
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// float y0 = (UBL_MESH_MIN_Y) + ((MESH_Y_DIST) * cell_yi ); // lower left cell corner
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// float x1 = x0 + MESH_X_DIST; // upper right cell corner
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// float y1 = y0 + MESH_Y_DIST; // upper right cell corner
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float x0 = pgm_read_float(&(ubl.mesh_index_to_xpos[cell_xi ])); // 64 byte table lookup avoids mul+add
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float y0 = pgm_read_float(&(ubl.mesh_index_to_ypos[cell_yi ])); // 64 byte table lookup avoids mul+add
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float x1 = pgm_read_float(&(ubl.mesh_index_to_xpos[cell_xi+1])); // 64 byte table lookup avoids mul+add
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float y1 = pgm_read_float(&(ubl.mesh_index_to_ypos[cell_yi+1])); // 64 byte table lookup avoids mul+add
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const float x0 = pgm_read_float(&(ubl.mesh_index_to_xpos[cell_xi ])), // 64 byte table lookup avoids mul+add
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y0 = pgm_read_float(&(ubl.mesh_index_to_ypos[cell_yi ])), // 64 byte table lookup avoids mul+add
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x1 = pgm_read_float(&(ubl.mesh_index_to_xpos[cell_xi+1])), // 64 byte table lookup avoids mul+add
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y1 = pgm_read_float(&(ubl.mesh_index_to_ypos[cell_yi+1])), // 64 byte table lookup avoids mul+add
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cx = rx - x0, // cell-relative x
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cy = ry - y0; // cell-relative y
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float cx = rx - x0; // cell-relative x
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float cy = ry - y0; // cell-relative y
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float z_x0y0 = ubl.z_values[cell_xi ][cell_yi ], // z at lower left corner
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z_x1y0 = ubl.z_values[cell_xi+1][cell_yi ], // z at upper left corner
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z_x0y1 = ubl.z_values[cell_xi ][cell_yi+1], // z at lower right corner
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z_x1y1 = ubl.z_values[cell_xi+1][cell_yi+1]; // z at upper right corner
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float z_x0y0 = ubl.z_values[cell_xi ][cell_yi ]; // z at lower left corner
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float z_x1y0 = ubl.z_values[cell_xi+1][cell_yi ]; // z at upper left corner
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float z_x0y1 = ubl.z_values[cell_xi ][cell_yi+1]; // z at lower right corner
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float z_x1y1 = ubl.z_values[cell_xi+1][cell_yi+1]; // z at upper right corner
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if (isnan(z_x0y0)) z_x0y0 = 0; // ideally activating ubl.state.active (G29 A)
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if (isnan(z_x1y0)) z_x1y0 = 0; // should refuse if any invalid mesh points
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if (isnan(z_x0y1)) z_x0y1 = 0; // in order to avoid isnan tests per cell,
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if (isnan(z_x1y1)) z_x1y1 = 0; // thus guessing zero for undefined points
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if ( isnan( z_x0y0 )) z_x0y0 = 0; // ideally activating ubl.state.active (G29 A)
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if ( isnan( z_x1y0 )) z_x1y0 = 0; // should refuse if any invalid mesh points
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if ( isnan( z_x0y1 )) z_x0y1 = 0; // in order to avoid isnan tests per cell,
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if ( isnan( z_x1y1 )) z_x1y1 = 0; // thus guessing zero for undefined points
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const float z_xmy0 = (z_x1y0 - z_x0y0) * (1.0 / (MESH_X_DIST)), // z slope per x along y0 (lower left to lower right)
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z_xmy1 = (z_x1y1 - z_x0y1) * (1.0 / (MESH_X_DIST)); // z slope per x along y1 (upper left to upper right)
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float z_xmy0 = (z_x1y0 - z_x0y0) * (1.0/MESH_X_DIST); // z slope per x along y0 (lower left to lower right)
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float z_xmy1 = (z_x1y1 - z_x0y1) * (1.0/MESH_X_DIST); // z slope per x along y1 (upper left to upper right)
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float z_cxy0 = z_x0y0 + z_xmy0 * cx; // z height along y0 at cx
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float z_cxy0 = z_x0y0 + z_xmy0 * cx; // z height along y0 at cx
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float z_cxy1 = z_x0y1 + z_xmy1 * cx; // z height along y1 at cx
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float z_cxyd = z_cxy1 - z_cxy0; // z height difference along cx from y0 to y1
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const float z_cxy1 = z_x0y1 + z_xmy1 * cx, // z height along y1 at cx
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z_cxyd = z_cxy1 - z_cxy0; // z height difference along cx from y0 to y1
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float z_cxym = z_cxyd * (1.0/MESH_Y_DIST); // z slope per y along cx from y0 to y1
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float z_cxcy = z_cxy0 + z_cxym * cy; // z height along cx at cy
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float z_cxym = z_cxyd * (1.0 / (MESH_Y_DIST)), // z slope per y along cx from y0 to y1
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z_cxcy = z_cxy0 + z_cxym * cy; // z height along cx at cy
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// As subsequent segments step through this cell, the z_cxy0 intercept will change
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// and the z_cxym slope will change, both as a function of cx within the cell, and
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// each change by a constant for fixed segment lengths.
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float z_sxy0 = z_xmy0 * dx_seg; // per-segment adjustment to z_cxy0
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float z_sxym = ( z_xmy1 - z_xmy0 ) * (1.0/MESH_Y_DIST) * dx_seg; // per-segment adjustment to z_cxym
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const float z_sxy0 = z_xmy0 * dx_seg, // per-segment adjustment to z_cxy0
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z_sxym = (z_xmy1 - z_xmy0) * (1.0 / (MESH_Y_DIST)) * dx_seg; // per-segment adjustment to z_cxym
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do { // for all segments within this mesh cell
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z_cxcy += ubl.state.z_offset;
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if ( --segments == 0 ) { // this is last segment, use ltarget for exact
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COPY_XYZE( seg_dest, ltarget );
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if (--segments == 0) { // this is last segment, use ltarget for exact
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COPY(seg_dest, ltarget);
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seg_dest[Z_AXIS] += z_cxcy;
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ubl_buffer_line_segment( seg_dest, feedrate, active_extruder );
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ubl_buffer_line_segment(seg_dest, feedrate, active_extruder);
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return false; // did not set_current_to_destination()
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}
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float z_orig = seg_dest[Z_AXIS]; // remember the pre-leveled segment z value
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seg_dest[Z_AXIS] = z_orig + z_cxcy; // adjust segment z height per mesh leveling
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ubl_buffer_line_segment( seg_dest, feedrate, active_extruder );
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seg_dest[Z_AXIS] = z_orig; // restore pre-leveled z before incrementing
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const float z_orig = seg_dest[Z_AXIS]; // remember the pre-leveled segment z value
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seg_dest[Z_AXIS] = z_orig + z_cxcy; // adjust segment z height per mesh leveling
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ubl_buffer_line_segment(seg_dest, feedrate, active_extruder);
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seg_dest[Z_AXIS] = z_orig; // restore pre-leveled z before incrementing
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LOOP_XYZE(i) seg_dest[i] += segment_distance[i]; // adjust seg_dest for next segment
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cx += dx_seg;
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cy += dy_seg;
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if ( !WITHIN(cx,0,MESH_X_DIST) || !WITHIN(cy,0,MESH_Y_DIST)) { // done within this cell, break to next
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if (!WITHIN(cx, 0, MESH_X_DIST) || !WITHIN(cy, 0, MESH_Y_DIST)) { // done within this cell, break to next
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rx = RAW_X_POSITION(seg_dest[X_AXIS]);
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ry = RAW_Y_POSITION(seg_dest[Y_AXIS]);
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break;
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Scott Lahteine
8 years ago