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Cleanups to UBL_DELTA

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This commit is contained in:
Scott Lahteine
2017-05-12 01:05:11 -05:00
parent cbfca29522
commit 0696dda470
6 changed files with 116 additions and 148 deletions
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10
Marlin/Conditionals_post.h
View File

@@ -731,15 +731,12 @@
* Set granular options based on the specific type of leveling
*/
#if ENABLED(AUTO_BED_LEVELING_UBL) && ENABLED(DELTA)
#define UBL_DELTA
#endif
#define UBL_DELTA (ENABLED(AUTO_BED_LEVELING_UBL) && ENABLED(DELTA))
#define ABL_PLANAR (ENABLED(AUTO_BED_LEVELING_LINEAR) || ENABLED(AUTO_BED_LEVELING_3POINT))
#define ABL_GRID (ENABLED(AUTO_BED_LEVELING_LINEAR) || ENABLED(AUTO_BED_LEVELING_BILINEAR))
#define HAS_ABL (ABL_PLANAR || ABL_GRID || ENABLED(AUTO_BED_LEVELING_UBL))
#define HAS_LEVELING (HAS_ABL || ENABLED(MESH_BED_LEVELING))
#define PLANNER_LEVELING (ABL_PLANAR || ABL_GRID || ENABLED(MESH_BED_LEVELING) || ENABLED(UBL_DELTA))
#define PLANNER_LEVELING (ABL_PLANAR || ABL_GRID || ENABLED(MESH_BED_LEVELING) || UBL_DELTA)
#define HAS_PROBING_PROCEDURE (HAS_ABL || ENABLED(Z_MIN_PROBE_REPEATABILITY_TEST))
#if HAS_PROBING_PROCEDURE
#define PROBE_BED_WIDTH abs(RIGHT_PROBE_BED_POSITION - (LEFT_PROBE_BED_POSITION))
@@ -823,8 +820,7 @@
/**
* DELTA_SEGMENT_MIN_LENGTH for UBL_DELTA
*/
#if ENABLED(UBL_DELTA)
#if UBL_DELTA
#ifndef DELTA_SEGMENT_MIN_LENGTH
#if IS_SCARA
#define DELTA_SEGMENT_MIN_LENGTH 0.25 // SCARA minimum segment size is 0.25mm

13
Marlin/G26_Mesh_Validation_Tool.cpp
View File

@@ -278,8 +278,7 @@
// If this mesh location is outside the printable_radius, skip it.
if ( ! position_is_reachable_raw_xy( circle_x, circle_y ))
continue;
if (!position_is_reachable_raw_xy(circle_x, circle_y)) continue;
xi = location.x_index; // Just to shrink the next few lines and make them easier to understand
yi = location.y_index;
@@ -329,9 +328,7 @@
ye = circle_y + sin_table[tmp_div_30 + 1];
#if IS_KINEMATIC
// Check to make sure this segment is entirely on the bed, skip if not.
if (( ! position_is_reachable_raw_xy( x , y )) ||
( ! position_is_reachable_raw_xy( xe, ye )))
continue;
if (!position_is_reachable_raw_xy(x, y) || !position_is_reachable_raw_xy(xe, ye)) continue;
#else // not, we need to skip
x = constrain(x, X_MIN_POS + 1, X_MAX_POS - 1); // This keeps us from bumping the endstops
y = constrain(y, Y_MIN_POS + 1, Y_MAX_POS - 1);
@@ -459,8 +456,7 @@
sy = ey = constrain(pgm_read_float(&ubl.mesh_index_to_ypos[j]), Y_MIN_POS + 1, Y_MAX_POS - 1);
ex = constrain(ex, X_MIN_POS + 1, X_MAX_POS - 1);
if (( position_is_reachable_raw_xy( sx, sy )) &&
( position_is_reachable_raw_xy( ex, ey ))) {
if (position_is_reachable_raw_xy(sx, sy) && position_is_reachable_raw_xy(ex, ey)) {
if (ubl.g26_debug_flag) {
SERIAL_ECHOPAIR(" Connecting with horizontal line (sx=", sx);
@@ -494,8 +490,7 @@
sy = constrain(sy, Y_MIN_POS + 1, Y_MAX_POS - 1);
ey = constrain(ey, Y_MIN_POS + 1, Y_MAX_POS - 1);
if (( position_is_reachable_raw_xy( sx, sy )) &&
( position_is_reachable_raw_xy( ex, ey ))) {
if (position_is_reachable_raw_xy(sx, sy) && position_is_reachable_raw_xy(ex, ey)) {
if (ubl.g26_debug_flag) {
SERIAL_ECHOPAIR(" Connecting with vertical line (sx=", sx);

33
Marlin/Marlin_main.cpp
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@@ -2427,8 +2427,11 @@ static void clean_up_after_endstop_or_probe_move() {
#elif ENABLED(AUTO_BED_LEVELING_UBL)
#if ENABLED(UBL_DELTA)
if (( ubl.state.active ) && ( ! enable )) { // leveling from on to off
#if PLANNER_LEVELING
if (ubl.state.active != enable) {
if (!enable) // leveling from on to off
planner.apply_leveling(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS]);
else
planner.unapply_leveling(current_position);
}
#endif
@@ -11104,7 +11107,7 @@ void set_current_from_steppers_for_axis(const AxisEnum axis) {
#endif // AUTO_BED_LEVELING_BILINEAR
#if IS_KINEMATIC && DISABLED(UBL_DELTA)
#if IS_KINEMATIC && !UBL_DELTA
/**
* Prepare a linear move in a DELTA or SCARA setup.
@@ -11225,7 +11228,7 @@ void set_current_from_steppers_for_axis(const AxisEnum axis) {
return false;
}
#else // !IS_KINEMATIC
#else // !IS_KINEMATIC || UBL_DELTA
/**
* Prepare a linear move in a Cartesian setup.
@@ -11263,7 +11266,7 @@ void set_current_from_steppers_for_axis(const AxisEnum axis) {
return false;
}
#endif // !IS_KINEMATIC
#endif // !IS_KINEMATIC || UBL_DELTA
#if ENABLED(DUAL_X_CARRIAGE)
@@ -11375,21 +11378,21 @@ void prepare_move_to_destination() {
#endif
if (
#if IS_KINEMATIC
#if ENABLED(UBL_DELTA)
if (ubl_prepare_linear_move_to(destination,feedrate_mm_s)) return;
#if UBL_DELTA
ubl_prepare_linear_move_to(destination, feedrate_mm_s)
#else
if (prepare_kinematic_move_to(destination)) return;
prepare_kinematic_move_to(destination)
#endif
#elif ENABLED(DUAL_X_CARRIAGE)
prepare_move_to_destination_dualx()
#elif UBL_DELTA // will work for CARTESIAN too (smaller segments follow mesh more closely)
ubl_prepare_linear_move_to(destination, feedrate_mm_s)
#else
#if ENABLED(DUAL_X_CARRIAGE)
if (prepare_move_to_destination_dualx()) return;
#elif ENABLED(UBL_DELTA) // will work for CARTESIAN too (smaller segments follow mesh more closely)
if (ubl_prepare_linear_move_to(destination,feedrate_mm_s)) return;
#else
if (prepare_move_to_destination_cartesian()) return;
#endif
prepare_move_to_destination_cartesian()
#endif
) return;
set_current_to_destination();
}

29
Marlin/SanityCheck.h
View File

@@ -248,11 +248,9 @@
#if ENABLED(DELTA)
#if DISABLED(USE_XMAX_PLUG) && DISABLED(USE_YMAX_PLUG) && DISABLED(USE_ZMAX_PLUG)
#error "You probably want to use Max Endstops for DELTA!"
#endif
#if ENABLED(ENABLE_LEVELING_FADE_HEIGHT) && DISABLED(UBL_DELTA)
#error "ENABLE_LEVELING_FADE_HEIGHT for DELTA requires UBL_DELTA and AUTO_BED_LEVELING_UBL."
#endif
#if ABL_GRID
#elif ENABLED(ENABLE_LEVELING_FADE_HEIGHT) && DISABLED(AUTO_BED_LEVELING_BILINEAR) && !UBL_DELTA
#error "ENABLE_LEVELING_FADE_HEIGHT on DELTA requires AUTO_BED_LEVELING_BILINEAR or AUTO_BED_LEVELING_UBL."
#elif ABL_GRID
#if (GRID_MAX_POINTS_X & 1) == 0 || (GRID_MAX_POINTS_Y & 1) == 0
#error "DELTA requires GRID_MAX_POINTS_X and GRID_MAX_POINTS_Y to be odd numbers."
#elif GRID_MAX_POINTS_X < 3
@@ -431,20 +429,11 @@ static_assert(1 >= 0
* Unified Bed Leveling
*/
#if ENABLED(AUTO_BED_LEVELING_UBL)
#if IS_KINEMATIC
#if ENABLED(DELTA)
#if DISABLED(UBL_DELTA)
#error "AUTO_BED_LEVELING_UBL requires UBL_DELTA for DELTA printers."
#endif
#else // SCARA
#error "AUTO_BED_LEVELING_UBL not supported for SCARA printers."
#endif
#endif
#if DISABLED(NEWPANEL)
#if IS_SCARA
#error "AUTO_BED_LEVELING_UBL does not yet support SCARA printers."
#elif DISABLED(NEWPANEL)
#error "AUTO_BED_LEVELING_UBL requires an LCD controller."
#endif
#elif ENABLED(UBL_DELTA)
#error "UBL_DELTA requires AUTO_BED_LEVELING_UBL."
#endif
/**
@@ -603,10 +592,8 @@ static_assert(1 >= 0
/**
* Delta and SCARA have limited bed leveling options
*/
#if IS_KINEMATIC
#if DISABLED(AUTO_BED_LEVELING_BILINEAR) && DISABLED(UBL_DELTA)
#error "Only AUTO_BED_LEVELING_BILINEAR or AUTO_BED_LEVELING_UBL with UBL_DELTA support DELTA and SCARA bed leveling."
#endif
#if IS_SCARA && DISABLED(AUTO_BED_LEVELING_BILINEAR)
#error "Only AUTO_BED_LEVELING_BILINEAR currently supports SCARA bed leveling."
#endif
/**

12
Marlin/planner.cpp
View File

@@ -534,12 +534,12 @@ void Planner::check_axes_activity() {
*/
void Planner::apply_leveling(float &lx, float &ly, float &lz) {
#if ENABLED(AUTO_BED_LEVELING_UBL) && ENABLED(UBL_DELTA) // probably should also be enabled for UBL without UBL_DELTA
#if ENABLED(AUTO_BED_LEVELING_UBL) && UBL_DELTA // probably should also be enabled for UBL without UBL_DELTA
if (!ubl.state.active) return;
#if ENABLED(ENABLE_LEVELING_FADE_HEIGHT)
// if z_fade_height enabled (nonzero) and raw_z above it, no leveling required
if ((planner.z_fade_height) && (planner.z_fade_height <= RAW_Z_POSITION(lz))) return;
lz += ubl.state.z_offset + ( ubl.get_z_correction(lx,ly) * ubl.fade_scaling_factor_for_z(lz));
lz += ubl.state.z_offset + ubl.get_z_correction(lx,ly) * ubl.fade_scaling_factor_for_z(lz);
#else // no fade
lz += ubl.state.z_offset + ubl.get_z_correction(lx,ly);
#endif // FADE
@@ -598,12 +598,12 @@ void Planner::check_axes_activity() {
void Planner::unapply_leveling(float logical[XYZ]) {
#if ENABLED(AUTO_BED_LEVELING_UBL) && ENABLED(UBL_DELTA)
#if ENABLED(AUTO_BED_LEVELING_UBL) && UBL_DELTA
if (ubl.state.active) {
float z_leveled = RAW_Z_POSITION(logical[Z_AXIS]);
float z_ublmesh = ubl.get_z_correction(logical[X_AXIS],logical[Y_AXIS]);
const float z_leveled = RAW_Z_POSITION(logical[Z_AXIS]),
z_ublmesh = ubl.get_z_correction(logical[X_AXIS], logical[Y_AXIS]);
float z_unlevel = z_leveled - ubl.state.z_offset - z_ublmesh;
#if ENABLED(ENABLE_LEVELING_FADE_HEIGHT)
@@ -617,7 +617,7 @@ void Planner::check_axes_activity() {
// so U==(L-O-M)/(1-M/H) for U<H
if (planner.z_fade_height) {
float z_unfaded = z_unlevel / ( 1.0 - ( z_ublmesh * planner.inverse_z_fade_height ));
float z_unfaded = z_unlevel / (1.0 - z_ublmesh * planner.inverse_z_fade_height);
if (z_unfaded < planner.z_fade_height) // don't know until after compute
z_unlevel = z_unfaded;
}

99
Marlin/ubl_motion.cpp
View File

@@ -474,20 +474,10 @@
set_current_to_destination();
}
#ifdef UBL_DELTA
#define COPY_XYZE( target, source ) { \
target[X_AXIS] = source[X_AXIS]; \
target[Y_AXIS] = source[Y_AXIS]; \
target[Z_AXIS] = source[Z_AXIS]; \
target[E_AXIS] = source[E_AXIS]; \
}
#if UBL_DELTA
#if IS_SCARA // scale the feed rate from mm/s to degrees/s
static float scara_feed_factor;
static float scara_oldA;
static float scara_oldB;
static float scara_feed_factor, scara_oldA, scara_oldB;
#endif
// We don't want additional apply_leveling() performed by regular buffer_line or buffer_line_kinematic,
@@ -501,8 +491,8 @@
float feedrate = fr_mm_s;
#if IS_SCARA // scale the feed rate from mm/s to degrees/s
float adiff = abs(delta[A_AXIS] - scara_oldA);
float bdiff = abs(delta[B_AXIS] - scara_oldB);
float adiff = abs(delta[A_AXIS] - scara_oldA),
bdiff = abs(delta[B_AXIS] - scara_oldB);
scara_oldA = delta[A_AXIS];
scara_oldB = delta[B_AXIS];
feedrate = max(adiff, bdiff) * scara_feed_factor;
@@ -535,19 +525,19 @@
ltarget[E_AXIS] - current_position[E_AXIS]
};
float cartesian_xy_mm = sqrtf( sq(difference[X_AXIS]) + sq(difference[Y_AXIS]) ); // total horizontal xy distance
const float cartesian_xy_mm = HYPOT(difference[X_AXIS], difference[Y_AXIS]); // total horizontal xy distance
#if IS_KINEMATIC
float seconds = cartesian_xy_mm / feedrate; // seconds to move xy distance at requested rate
uint16_t segments = lroundf( delta_segments_per_second * seconds ); // preferred number of segments for distance @ feedrate
uint16_t seglimit = lroundf( cartesian_xy_mm * (1.0/(DELTA_SEGMENT_MIN_LENGTH))); // number of segments at minimum segment length
const float seconds = cartesian_xy_mm / feedrate; // seconds to move xy distance at requested rate
uint16_t segments = lroundf(delta_segments_per_second * seconds), // preferred number of segments for distance @ feedrate
seglimit = lroundf(cartesian_xy_mm * (1.0 / (DELTA_SEGMENT_MIN_LENGTH))); // number of segments at minimum segment length
NOMORE(segments, seglimit); // limit to minimum segment length (fewer segments)
#else
uint16_t segments = lroundf(cartesian_xy_mm * (1.0 / (DELTA_SEGMENT_MIN_LENGTH))); // cartesian fixed segment length
#endif
NOLESS(segments, 1); // must have at least one segment
float inv_segments = 1.0 / segments; // divide once, multiply thereafter
const float inv_segments = 1.0 / segments; // divide once, multiply thereafter
#if IS_SCARA // scale the feed rate from mm/s to degrees/s
scara_feed_factor = cartesian_xy_mm * inv_segments * feedrate;
@@ -565,22 +555,22 @@
// Note that E segment distance could vary slightly as z mesh height
// changes for each segment, but small enough to ignore.
bool above_fade_height = false;
const bool above_fade_height = (
#if ENABLED(ENABLE_LEVELING_FADE_HEIGHT)
if (( planner.z_fade_height != 0 ) &&
( planner.z_fade_height < RAW_Z_POSITION(ltarget[Z_AXIS]) )) {
above_fade_height = true;
}
planner.z_fade_height != 0 && planner.z_fade_height < RAW_Z_POSITION(ltarget[Z_AXIS])
#else
false
#endif
);
// Only compute leveling per segment if ubl active and target below z_fade_height.
if (( ! ubl.state.active ) || ( above_fade_height )) { // no mesh leveling
if (!ubl.state.active || above_fade_height) { // no mesh leveling
const float z_offset = ubl.state.active ? ubl.state.z_offset : 0.0;
float seg_dest[XYZE]; // per-segment destination,
COPY_XYZE( seg_dest, current_position ); // starting from current position
COPY(seg_dest, current_position); // starting from current position
while (--segments) {
LOOP_XYZE(i) seg_dest[i] += segment_distance[i];
@@ -591,7 +581,7 @@
}
// Since repeated adding segment_distance accumulates small errors, final move to exact destination.
COPY_XYZE( seg_dest, ltarget );
COPY(seg_dest, ltarget);
seg_dest[Z_AXIS] += z_offset;
ubl_buffer_line_segment(seg_dest, feedrate, active_extruder);
return false; // moved but did not set_current_to_destination();
@@ -599,18 +589,14 @@
// Otherwise perform per-segment leveling
#if ENABLED(ENABLE_LEVELING_FADE_HEIGHT)
float fade_scaling_factor = ubl.fade_scaling_factor_for_z(ltarget[Z_AXIS]);
#endif
float seg_dest[XYZE]; // per-segment destination, initialize to first segment
LOOP_XYZE(i) seg_dest[i] = current_position[i] + segment_distance[i];
const float& dx_seg = segment_distance[X_AXIS]; // alias for clarity
const float& dy_seg = segment_distance[Y_AXIS];
float rx = RAW_X_POSITION(seg_dest[X_AXIS]); // assume raw vs logical coordinates shifted but not scaled.
float ry = RAW_Y_POSITION(seg_dest[Y_AXIS]);
float rx = RAW_X_POSITION(seg_dest[X_AXIS]), // assume raw vs logical coordinates shifted but not scaled.
ry = RAW_Y_POSITION(seg_dest[Y_AXIS]);
do { // for each mesh cell encountered during the move
@@ -621,10 +607,10 @@
// in top of loop and again re-find same adjacent cell and use it, just less efficient
// for mesh inset area.
int8_t cell_xi = (rx - (UBL_MESH_MIN_X)) * (1.0 / (MESH_X_DIST));
cell_xi = constrain( cell_xi, 0, (GRID_MAX_POINTS_X) - 1 );
int8_t cell_xi = (rx - (UBL_MESH_MIN_X)) * (1.0 / (MESH_X_DIST)),
cell_yi = (ry - (UBL_MESH_MIN_Y)) * (1.0 / (MESH_X_DIST));
int8_t cell_yi = (ry - (UBL_MESH_MIN_Y)) * (1.0 / (MESH_X_DIST));
cell_xi = constrain(cell_xi, 0, (GRID_MAX_POINTS_X) - 1);
cell_yi = constrain(cell_yi, 0, (GRID_MAX_POINTS_Y) - 1);
// float x0 = (UBL_MESH_MIN_X) + ((MESH_X_DIST) * cell_xi ); // lower left cell corner
@@ -632,53 +618,54 @@
// float x1 = x0 + MESH_X_DIST; // upper right cell corner
// float y1 = y0 + MESH_Y_DIST; // upper right cell corner
float x0 = pgm_read_float(&(ubl.mesh_index_to_xpos[cell_xi ])); // 64 byte table lookup avoids mul+add
float y0 = pgm_read_float(&(ubl.mesh_index_to_ypos[cell_yi ])); // 64 byte table lookup avoids mul+add
float x1 = pgm_read_float(&(ubl.mesh_index_to_xpos[cell_xi+1])); // 64 byte table lookup avoids mul+add
float y1 = pgm_read_float(&(ubl.mesh_index_to_ypos[cell_yi+1])); // 64 byte table lookup avoids mul+add
const float x0 = pgm_read_float(&(ubl.mesh_index_to_xpos[cell_xi ])), // 64 byte table lookup avoids mul+add
y0 = pgm_read_float(&(ubl.mesh_index_to_ypos[cell_yi ])), // 64 byte table lookup avoids mul+add
x1 = pgm_read_float(&(ubl.mesh_index_to_xpos[cell_xi+1])), // 64 byte table lookup avoids mul+add
y1 = pgm_read_float(&(ubl.mesh_index_to_ypos[cell_yi+1])), // 64 byte table lookup avoids mul+add
float cx = rx - x0; // cell-relative x
float cy = ry - y0; // cell-relative y
cx = rx - x0, // cell-relative x
cy = ry - y0; // cell-relative y
float z_x0y0 = ubl.z_values[cell_xi ][cell_yi ]; // z at lower left corner
float z_x1y0 = ubl.z_values[cell_xi+1][cell_yi ]; // z at upper left corner
float z_x0y1 = ubl.z_values[cell_xi ][cell_yi+1]; // z at lower right corner
float z_x1y1 = ubl.z_values[cell_xi+1][cell_yi+1]; // z at upper right corner
float z_x0y0 = ubl.z_values[cell_xi ][cell_yi ], // z at lower left corner
z_x1y0 = ubl.z_values[cell_xi+1][cell_yi ], // z at upper left corner
z_x0y1 = ubl.z_values[cell_xi ][cell_yi+1], // z at lower right corner
z_x1y1 = ubl.z_values[cell_xi+1][cell_yi+1]; // z at upper right corner
if (isnan(z_x0y0)) z_x0y0 = 0; // ideally activating ubl.state.active (G29 A)
if (isnan(z_x1y0)) z_x1y0 = 0; // should refuse if any invalid mesh points
if (isnan(z_x0y1)) z_x0y1 = 0; // in order to avoid isnan tests per cell,
if (isnan(z_x1y1)) z_x1y1 = 0; // thus guessing zero for undefined points
float z_xmy0 = (z_x1y0 - z_x0y0) * (1.0/MESH_X_DIST); // z slope per x along y0 (lower left to lower right)
float z_xmy1 = (z_x1y1 - z_x0y1) * (1.0/MESH_X_DIST); // z slope per x along y1 (upper left to upper right)
const float z_xmy0 = (z_x1y0 - z_x0y0) * (1.0 / (MESH_X_DIST)), // z slope per x along y0 (lower left to lower right)
z_xmy1 = (z_x1y1 - z_x0y1) * (1.0 / (MESH_X_DIST)); // z slope per x along y1 (upper left to upper right)
float z_cxy0 = z_x0y0 + z_xmy0 * cx; // z height along y0 at cx
float z_cxy1 = z_x0y1 + z_xmy1 * cx; // z height along y1 at cx
float z_cxyd = z_cxy1 - z_cxy0; // z height difference along cx from y0 to y1
float z_cxym = z_cxyd * (1.0/MESH_Y_DIST); // z slope per y along cx from y0 to y1
float z_cxcy = z_cxy0 + z_cxym * cy; // z height along cx at cy
const float z_cxy1 = z_x0y1 + z_xmy1 * cx, // z height along y1 at cx
z_cxyd = z_cxy1 - z_cxy0; // z height difference along cx from y0 to y1
float z_cxym = z_cxyd * (1.0 / (MESH_Y_DIST)), // z slope per y along cx from y0 to y1
z_cxcy = z_cxy0 + z_cxym * cy; // z height along cx at cy
// As subsequent segments step through this cell, the z_cxy0 intercept will change
// and the z_cxym slope will change, both as a function of cx within the cell, and
// each change by a constant for fixed segment lengths.
float z_sxy0 = z_xmy0 * dx_seg; // per-segment adjustment to z_cxy0
float z_sxym = ( z_xmy1 - z_xmy0 ) * (1.0/MESH_Y_DIST) * dx_seg; // per-segment adjustment to z_cxym
const float z_sxy0 = z_xmy0 * dx_seg, // per-segment adjustment to z_cxy0
z_sxym = (z_xmy1 - z_xmy0) * (1.0 / (MESH_Y_DIST)) * dx_seg; // per-segment adjustment to z_cxym
do { // for all segments within this mesh cell
z_cxcy += ubl.state.z_offset;
if (--segments == 0) { // this is last segment, use ltarget for exact
COPY_XYZE( seg_dest, ltarget );
COPY(seg_dest, ltarget);
seg_dest[Z_AXIS] += z_cxcy;
ubl_buffer_line_segment(seg_dest, feedrate, active_extruder);
return false; // did not set_current_to_destination()
}
float z_orig = seg_dest[Z_AXIS]; // remember the pre-leveled segment z value
const float z_orig = seg_dest[Z_AXIS]; // remember the pre-leveled segment z value
seg_dest[Z_AXIS] = z_orig + z_cxcy; // adjust segment z height per mesh leveling
ubl_buffer_line_segment(seg_dest, feedrate, active_extruder);
seg_dest[Z_AXIS] = z_orig; // restore pre-leveled z before incrementing