321 lines
10 KiB
Perl
321 lines
10 KiB
Perl
package Slic3r::Extruder;
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use Moo;
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use Slic3r::Geometry qw(scale);
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has 'layer' => (is => 'rw');
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has 'shift_x' => (is => 'ro', default => sub {0} );
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has 'shift_y' => (is => 'ro', default => sub {0} );
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has 'z' => (is => 'rw', default => sub {0} );
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has 'print_feed_rate' => (is => 'rw');
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has 'extrusion_distance' => (is => 'rw', default => sub {0} );
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has 'total_extrusion_length' => (is => 'rw', default => sub {0} );
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has 'retracted' => (is => 'rw', default => sub {1} ); # this spits out some plastic at start
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has 'lifted' => (is => 'rw', default => sub {0} );
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has 'last_pos' => (is => 'rw', default => sub { Slic3r::Point->new(0,0) } );
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has 'last_f' => (is => 'rw', default => sub {0});
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has 'dec' => (is => 'ro', default => sub { 3 } );
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# calculate speeds
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has 'travel_speed' => (
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is => 'ro',
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default => sub { $Slic3r::travel_speed * 60 }, # mm/min
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);
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has 'perimeter_speed' => (
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is => 'ro',
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default => sub { $Slic3r::perimeter_speed * 60 }, # mm/min
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);
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has 'small_perimeter_speed' => (
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is => 'ro',
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default => sub { $Slic3r::small_perimeter_speed * 60 }, # mm/min
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);
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has 'infill_speed' => (
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is => 'ro',
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default => sub { $Slic3r::infill_speed * 60 }, # mm/min
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);
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has 'solid_infill_speed' => (
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is => 'ro',
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default => sub { $Slic3r::solid_infill_speed * 60 }, # mm/min
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);
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has 'bridge_speed' => (
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is => 'ro',
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default => sub { $Slic3r::bridge_speed * 60 }, # mm/min
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);
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has 'retract_speed' => (
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is => 'ro',
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default => sub { $Slic3r::retract_speed * 60 }, # mm/min
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);
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use Slic3r::Geometry qw(points_coincide PI X Y);
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use XXX;
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sub change_layer {
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my $self = shift;
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my ($layer) = @_;
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$self->layer($layer);
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my $z = $Slic3r::z_offset + $layer->print_z * $Slic3r::resolution;
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my $gcode = "";
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$gcode .= $self->retract(move_z => $z);
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$gcode .= $self->G0(undef, $z, 0, 'move to next layer')
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if $self->z != $z;
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return $gcode;
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}
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sub extrude {
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my $self = shift;
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return $_[0]->isa('Slic3r::ExtrusionLoop')
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? $self->extrude_loop(@_)
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: $self->extrude_path(@_);
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}
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sub extrude_loop {
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my $self = shift;
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my ($loop, $description) = @_;
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# find the point of the loop that is closest to the current extruder position
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my $start_at = $loop->nearest_point_to($self->last_pos);
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# split the loop at the starting point and make a path
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my $extrusion_path = $loop->split_at($start_at);
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# clip the path to avoid the extruder to get exactly on the first point of the loop
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$extrusion_path->clip_end(scale $Slic3r::nozzle_diameter / 2);
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# extrude along the path
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return $self->extrude_path($extrusion_path, $description);
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}
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sub extrude_path {
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my $self = shift;
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my ($path, $description, $recursive) = @_;
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$path->merge_continuous_lines;
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# detect arcs
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if ($Slic3r::gcode_arcs && !$recursive) {
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my $gcode = "";
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$gcode .= $self->extrude_path($_, $description, 1) for $path->detect_arcs;
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return $gcode;
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}
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my $gcode = "";
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# retract if distance from previous position is greater or equal to the one
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# specified by the user *and* to the maximum distance between infill lines
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{
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my $distance_from_last_pos = $self->last_pos->distance_to($path->points->[0]) * $Slic3r::resolution;
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my $distance_threshold = $Slic3r::retract_before_travel;
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$distance_threshold = 2 * $Slic3r::flow_width / $Slic3r::fill_density * sqrt(2)
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if $Slic3r::fill_density > 0 && $description =~ /fill/;
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if ($distance_from_last_pos >= $distance_threshold) {
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$gcode .= $self->retract(travel_to => $path->points->[0]);
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}
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}
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# go to first point of extrusion path
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$gcode .= $self->G0($path->points->[0], undef, 0, "move to first $description point")
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if !points_coincide($self->last_pos, $path->points->[0]);
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# compensate retraction
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$gcode .= $self->unretract if $self->retracted;
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# calculate extrusion length per distance unit
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my $s = $path->flow_spacing || $Slic3r::flow_spacing;
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my $h = $path->depth_layers * $Slic3r::layer_height;
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my $w = ($s - $Slic3r::min_flow_spacing * $Slic3r::overlap_factor) / (1 - $Slic3r::overlap_factor);
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my $area;
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if ($path->role eq 'bridge') {
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$area = ($s**2) * PI/4;
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} elsif ($w >= ($Slic3r::nozzle_diameter + $h)) {
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# rectangle with semicircles at the ends
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$area = $w * $h + ($h**2) / 4 * (PI - 4);
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} else {
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# rectangle with shrunk semicircles at the ends
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$area = $Slic3r::nozzle_diameter * $h * (1 - PI/4) + $h * $w * PI/4;
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}
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my $e = $Slic3r::resolution
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* $area
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* $Slic3r::extrusion_multiplier
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* (4 / (($Slic3r::filament_diameter ** 2) * PI));
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# extrude arc or line
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$self->print_feed_rate(
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$path->role =~ /^(perimeter|skirt)$/o ? $self->perimeter_speed
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: $path->role eq 'small-perimeter' ? $self->small_perimeter_speed
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: $path->role eq 'fill' ? $self->infill_speed
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: $path->role eq 'solid-fill' ? $self->solid_infill_speed
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: $path->role eq 'bridge' ? $self->bridge_speed
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: die "Unknown role: " . $path->role
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);
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if ($path->isa('Slic3r::ExtrusionPath::Arc')) {
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$gcode .= $self->G2_G3($path->points->[-1], $path->orientation,
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$path->center, $e * $path->length, $description);
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} else {
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foreach my $line ($path->lines) {
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$gcode .= $self->G1($line->b, undef, $e * $line->length, $description);
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}
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}
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return $gcode;
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}
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sub retract {
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my $self = shift;
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my %params = @_;
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return "" unless $Slic3r::retract_length > 0
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&& !$self->retracted;
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# prepare moves
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$self->print_feed_rate($self->retract_speed);
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my $retract = [undef, undef, -$Slic3r::retract_length, "retract"];
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my $lift = ($Slic3r::retract_lift == 0 || defined $params{move_z})
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? undef
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: [undef, $self->z + $Slic3r::retract_lift, 0, 'lift plate during retraction'];
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my $gcode = "";
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if ($Slic3r::g0 && $params{travel_to}) {
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if ($lift) {
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# combine lift and retract
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$lift->[2] = $retract->[2];
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$gcode .= $self->G0(@$lift);
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} else {
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# combine travel and retract
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my $travel = [$params{travel_to}, undef, $retract->[2], 'travel and retract'];
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$gcode .= $self->G0(@$travel);
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}
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} elsif ($Slic3r::g0 && defined $params{move_z}) {
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# combine Z change and retraction
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my $travel = [undef, $params{move_z}, $retract->[2], 'change layer and retract'];
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$gcode .= $self->G0(@$travel);
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} else {
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$gcode .= $self->G1(@$retract);
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if ($lift) {
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$gcode .= $self->G1(@$lift);
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}
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}
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$self->retracted(1);
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$self->lifted(1) if $lift;
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# reset extrusion distance during retracts
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# this makes sure we leave sufficient precision in the firmware
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if (!$Slic3r::use_relative_e_distances) {
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$gcode .= "G92 " . $Slic3r::extrusion_axis . "0\n";
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$self->extrusion_distance(0);
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}
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return $gcode;
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}
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sub unretract {
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my $self = shift;
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$self->retracted(0);
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my $gcode = "";
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if ($self->lifted) {
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$gcode .= $self->G0(undef, $self->z - $Slic3r::retract_lift, 0, 'restore layer Z');
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$self->lifted(0);
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}
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$self->print_feed_rate($self->retract_speed);
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$gcode .= $self->G0(undef, undef, ($Slic3r::retract_length + $Slic3r::retract_restart_extra),
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"compensate retraction");
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return $gcode;
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}
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sub G0 {
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my $self = shift;
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return $self->G1(@_) if !$Slic3r::g0;
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return "G0" . $self->G0_G1(@_);
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}
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sub G1 {
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my $self = shift;
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return "G1" . $self->G0_G1(@_);
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}
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sub G0_G1 {
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my $self = shift;
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my ($point, $z, $e, $comment) = @_;
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my $dec = $self->dec;
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my $gcode = "";
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if ($point) {
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$gcode .= sprintf " X%.${dec}f Y%.${dec}f",
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($point->x * $Slic3r::resolution) + $self->shift_x,
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($point->y * $Slic3r::resolution) + $self->shift_y; #**
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$self->last_pos($point);
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}
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if (defined $z && $z != $self->z) {
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$self->z($z);
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$gcode .= sprintf " Z%.${dec}f", $z;
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}
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return $self->_Gx($gcode, $e, $comment);
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}
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sub G2_G3 {
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my $self = shift;
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my ($point, $orientation, $center, $e, $comment) = @_;
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my $dec = $self->dec;
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my $gcode = $orientation eq 'cw' ? "G2" : "G3";
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$gcode .= sprintf " X%.${dec}f Y%.${dec}f",
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($point->x * $Slic3r::resolution) + $self->shift_x,
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($point->y * $Slic3r::resolution) + $self->shift_y; #**
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# XY distance of the center from the start position
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$gcode .= sprintf " I%.${dec}f J%.${dec}f",
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($center->[X] - $self->last_pos->[X]) * $Slic3r::resolution,
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($center->[Y] - $self->last_pos->[Y]) * $Slic3r::resolution;
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$self->last_pos($point);
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return $self->_Gx($gcode, $e, $comment);
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}
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sub _Gx {
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my $self = shift;
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my ($gcode, $e, $comment) = @_;
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my $dec = $self->dec;
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# apply the speed reduction for print moves on bottom layer
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my $speed_multiplier = $e && $self->layer->id == 0 && $comment !~ /retract/
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? $Slic3r::bottom_layer_speed_ratio
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: 1;
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# determine speed
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my $speed = ($e ? $self->print_feed_rate : $self->travel_speed) * $speed_multiplier;
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# output speed if it's different from last one used
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# (goal: reduce gcode size)
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if ($speed != $self->last_f) {
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$gcode .= sprintf " F%.${dec}f", $speed;
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$self->last_f($speed);
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}
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# output extrusion distance
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if ($e && $Slic3r::extrusion_axis) {
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$self->extrusion_distance(0) if $Slic3r::use_relative_e_distances;
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$self->extrusion_distance($self->extrusion_distance + $e);
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$self->total_extrusion_length($self->total_extrusion_length + $e);
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$gcode .= sprintf " %s%.5f", $Slic3r::extrusion_axis, $self->extrusion_distance;
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}
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$gcode .= sprintf " ; %s", $comment if $comment && $Slic3r::gcode_comments;
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return "$gcode\n";
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}
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1;
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