From a5ba0af7efbc9123dc859885d2ebbf4cd2b5b87b Mon Sep 17 00:00:00 2001 From: Alessandro Ranellucci Date: Sat, 3 Sep 2011 20:47:38 +0200 Subject: [PATCH] Generate GCODE --- lib/Slic3r.pm | 12 ++++- lib/Slic3r/Line.pm | 4 +- lib/Slic3r/Point.pm | 7 +++ lib/Slic3r/Print.pm | 109 ++++++++++++++++++++++++++++++++++++++++++++ lib/Slic3r/STL.pm | 9 +++- slic3r.pl | 2 + 6 files changed, 139 insertions(+), 4 deletions(-) diff --git a/lib/Slic3r.pm b/lib/Slic3r.pm index 3e0ff3aea..0bf56a08b 100644 --- a/lib/Slic3r.pm +++ b/lib/Slic3r.pm @@ -16,6 +16,16 @@ use Slic3r::Surface; our $layer_height = 0.4; our $resolution = 0.1; our $perimeter_offsets = 3; -our $flow_width = 0.4; # make sure this is > $resolution +our $flow_width = 0.4; # TODO: verify this is a multiple of $resolution +our $temperature = 195; + +our $flow_rate = 60; # mm/sec +our $print_feed_rate = 60; # mm/sec +our $travel_feed_rate = 80; # mm/sec +our $bottom_layer_speed_ratio = 0.6; + +our $use_relative_e_distances = 1; + +our $print_center = [100,100]; # object will be centered around this point 1; diff --git a/lib/Slic3r/Line.pm b/lib/Slic3r/Line.pm index 92603cfc8..147e5635e 100644 --- a/lib/Slic3r/Line.pm +++ b/lib/Slic3r/Line.pm @@ -1,9 +1,11 @@ package Slic3r::Line; use Moose; - use Moose::Util::TypeConstraints; use Scalar::Util qw(weaken); +subtype 'Slic3r::Line::Length', as 'Int'; +coerce 'Slic3r::Line::Length', from 'Num', via { sprintf '%.0f', $_ }; + has 'a' => ( is => 'ro', isa => 'Slic3r::Point', diff --git a/lib/Slic3r/Point.pm b/lib/Slic3r/Point.pm index 16130048c..f0f8354c6 100644 --- a/lib/Slic3r/Point.pm +++ b/lib/Slic3r/Point.pm @@ -40,4 +40,11 @@ sub coincides_with { return $self->x == $point->x && $self->y == $point->y; #= } +sub distance_to { + my $self = shift; + my ($point) = @_; + + return sqrt(($point->x - $self->x)**2 + ($point->y - $self->y)**2); #- +} + 1; diff --git a/lib/Slic3r/Print.pm b/lib/Slic3r/Print.pm index f0c5f270f..599d71a99 100644 --- a/lib/Slic3r/Print.pm +++ b/lib/Slic3r/Print.pm @@ -1,6 +1,23 @@ package Slic3r::Print; use Moose; +use constant X => 0; +use constant Y => 1; + +has 'x_length' => ( + is => 'ro', + isa => 'Slic3r::Line::Length', + required => 1, + coerce => 1, +); + +has 'y_length' => ( + is => 'ro', + isa => 'Slic3r::Line::Length', + required => 1, + coerce => 1, +); + has 'layers' => ( traits => ['Array'], is => 'rw', @@ -38,4 +55,96 @@ sub extrude_perimeters { } } +sub export_gcode { + my $self = shift; + my ($file) = @_; + + # calculate speed for gcode commands + my $travel_feed_rate = $Slic3r::travel_feed_rate * 60; # mm/min + my $print_feed_rate = $Slic3r::print_feed_rate * 60; # mm/min + my $extrusion_speed_ratio = ($Slic3r::flow_rate / $Slic3r::print_feed_rate); + + # calculate number of decimals + my $dec = length((1 / $Slic3r::resolution) - 1); + + # calculate X,Y shift to center print around specified origin + my @shift = ( + $Slic3r::print_center->[X] - ($self->x_length * $Slic3r::resolution / 2), + $Slic3r::print_center->[Y] - ($self->y_length * $Slic3r::resolution / 2), + ); + + # open output gcode file + open my $fh, ">", $file + or die "Failed to open $file for writing\n"; + + # write start commands to file + # TODO: this must be customizable by user + print $fh "G28 ; home all axes\n"; + printf $fh "M109 S%d ; wait for temperature to be reached\n", $Slic3r::temperature; + print $fh "G90 ; use absolute coordinates\n"; + print $fh "G21 ; set units to millimeters\n"; + if ($Slic3r::use_relative_e_distances) { + print $fh "M83 ; use relative distances for extrusion\n"; + } else { + print $fh "M82 ; use absolute distances for extrusion\n"; + } + + # make up a subroutine to generate G1 commands + my $G1 = sub { + my ($point, $z, $extrusion_distance, $comment) = @_; + printf $fh "G1 X%.${dec}f Y%.${dec}f Z%.${dec}f", + ($point->x * $Slic3r::resolution) + $shift[X], + ($point->y * $Slic3r::resolution) + $shift[Y], #** + $z; + if ($extrusion_distance) { + printf $fh " F%.${dec}f E%.${dec}f", + $print_feed_rate, + ($extrusion_distance * $extrusion_speed_ratio * $Slic3r::resolution); + } else { + printf $fh " F%.${dec}f", $travel_feed_rate; + } + printf $fh " ; %s", $comment if $comment; + print $fh "\n"; + }; + + # write gcode commands layer by layer + foreach my $layer (@{ $self->layers }) { + my $z = ($layer->z * $Slic3r::resolution); + + # go to layer + # TODO: retraction + printf $fh "G1 Z%.${dec}f F%.${dec}f ; move to next layer\n", + $z, $travel_feed_rate; + + # extrude perimeters + foreach my $perimeter (@{ $layer->perimeters }) { + + # reset extrusion distance counter + my $extrusion_distance = 0; + if (!$Slic3r::use_relative_e_distances) { + print $fh "G92 E0 ; reset extrusion distance\n"; + } + + # go to first point (without extruding) + $G1->($perimeter->lines->[0]->a, $z, 0, 'move to first perimeter point'); + + # extrude while going to next points + foreach my $line (@{ $perimeter->lines }) { + $extrusion_distance = 0 if $Slic3r::use_relative_e_distances; + $extrusion_distance += $line->a->distance_to($line->b); + $G1->($line->b, $z, $extrusion_distance, 'perimeter'); + } + } + } + + # write end commands to file + # TODO: this must be customizable by user + print $fh "M104 S0 ; turn off temperature\n"; + print $fh "G28 X0 ; home X axis\n"; + print $fh "M84 ; disable motors\n"; + + # close our gcode file + close $fh; +} + 1; diff --git a/lib/Slic3r/STL.pm b/lib/Slic3r/STL.pm index dac245245..226b3832c 100644 --- a/lib/Slic3r/STL.pm +++ b/lib/Slic3r/STL.pm @@ -14,8 +14,7 @@ sub parse_file { my $self = shift; my ($file) = @_; - my $print = Slic3r::Print->new; - + # open STL file my $stl = CAD::Format::STL->new->load($file); # we only want to work with positive coordinates, so let's @@ -31,6 +30,12 @@ sub parse_file { } } + # initialize print job + my $print = Slic3r::Print->new( + x_length => ($extents[X][MAX] - $extents[X][MIN]) / $Slic3r::resolution, + y_length => ($extents[Y][MAX] - $extents[Y][MIN]) / $Slic3r::resolution, + ); + # calculate the displacements needed to # have lowest value for each axis at coordinate 0 my @shift = map 0 - $extents[$_][MIN], X,Y,Z; diff --git a/slic3r.pl b/slic3r.pl index 452822115..9f8ade592 100644 --- a/slic3r.pl +++ b/slic3r.pl @@ -16,6 +16,8 @@ my $print = $stl_parser->parse_file("testcube20mm.stl"); $print->extrude_perimeters; +$print->export_gcode("testcube20mm.gcode"); + #XXX $print; __END__