diff --git a/README.markdown b/README.markdown
index 3d708d722..4fa28d7a3 100644
--- a/README.markdown
+++ b/README.markdown
@@ -263,7 +263,8 @@ The author of the Silk icon set is Mark James.
--support-material-extrusion-width
Set a different extrusion width for support material
--bridge-flow-ratio Multiplier for extrusion when bridging (> 0, default: 1)
-
+ --vibration-limit Experimental frequency limit to avoid resonance (Hz, default: 15)
+
Multiple extruder options:
--extruder-offset Offset of each extruder, if firmware doesn't handle the displacement
(can be specified multiple times, default: 0x0)
diff --git a/lib/Slic3r/Config.pm b/lib/Slic3r/Config.pm
index 3e1a612af..8ee1708f9 100644
--- a/lib/Slic3r/Config.pm
+++ b/lib/Slic3r/Config.pm
@@ -410,6 +410,14 @@ our $Options = {
type => 'f',
default => 1,
},
+ 'vibration_limit' => {
+ label => 'Vibration limit',
+ tooltip => 'This experimental option will slow down those moves hitting the configured frequency limit. The purpose of limiting vibrations is to avoid mechanical resonance. Set zero to disable.',
+ sidetext => 'Hz',
+ cli => 'vibration-limit=f',
+ type => 'f',
+ default => 15,
+ },
# print options
'perimeters' => {
diff --git a/lib/Slic3r/GCode.pm b/lib/Slic3r/GCode.pm
index f65e6b11f..f5114cbd4 100644
--- a/lib/Slic3r/GCode.pm
+++ b/lib/Slic3r/GCode.pm
@@ -1,7 +1,7 @@
package Slic3r::GCode;
use Moo;
-use List::Util qw(first);
+use List::Util qw(min max first);
use Slic3r::ExtrusionPath ':roles';
use Slic3r::Geometry qw(scale unscale scaled_epsilon points_coincide PI X Y A B);
@@ -19,10 +19,16 @@ has 'total_extrusion_length' => (is => 'rw', default => sub {0} );
has 'lifted' => (is => 'rw', default => sub {0} );
has 'last_pos' => (is => 'rw', default => sub { Slic3r::Point->new(0,0) } );
has 'last_speed' => (is => 'rw', default => sub {""});
+has 'last_f' => (is => 'rw', default => sub {""});
+has 'force_f' => (is => 'rw', default => sub {0});
has 'last_fan_speed' => (is => 'rw', default => sub {0});
has 'last_path' => (is => 'rw');
has 'dec' => (is => 'ro', default => sub { 3 } );
+# used for vibration limit:
+has 'last_dir' => (is => 'ro', default => sub { [0,0] });
+has 'segment_time' => (is => 'ro', default => sub { [ [0,0,0], [0,0,0] ] });
+
# calculate speeds (mm/min)
has 'speeds' => (
is => 'ro',
@@ -69,6 +75,7 @@ sub move_z {
my $current_z = $self->z;
if (!defined $current_z || $current_z != ($z + $self->lifted)) {
$gcode .= $self->retract(move_z => $z);
+ $self->speed('travel');
$gcode .= $self->G0(undef, $z, 0, $comment || ('move to next layer (' . $self->layer->id . ')'))
unless ($current_z // -1) != ($self->z // -1);
}
@@ -149,6 +156,7 @@ sub extrude_path {
my $point = Slic3r::Geometry::point_along_segment(@$last_line, $last_line->length + scale $path->flow_spacing);
bless $point, 'Slic3r::Point';
$point->rotate(PI/6, $last_line->[B]);
+ $self->speed('travel');
$gcode .= $self->G0($point, undef, 0, "move inwards before travel");
}
}
@@ -158,6 +166,7 @@ sub extrude_path {
}
# go to first point of extrusion path
+ $self->speed('travel');
$gcode .= $self->G0($path->points->[0], undef, 0, "move to first $description point")
if !points_coincide($self->last_pos, $path->points->[0]);
@@ -181,23 +190,23 @@ sub extrude_path {
$self->speed( $role_speeds{$path->role} || die "Unknown role: " . $path->role );
my $path_length = 0;
if ($path->isa('Slic3r::ExtrusionPath::Arc')) {
- $path_length = $path->length;
+ $path_length = unscale $path->length;
$gcode .= $self->G2_G3($path->points->[-1], $path->orientation,
$path->center, $e * unscale $path_length, $description);
} else {
foreach my $line ($path->lines) {
- my $line_length = $line->length;
+ my $line_length = unscale $line->length;
$path_length += $line_length;
- $gcode .= $self->G1($line->[B], undef, $e * unscale $line_length, $description);
+ $gcode .= $self->G1($line->[B], undef, $e * $line_length, $description);
}
}
if ($Slic3r::Config->cooling) {
- my $path_time = unscale($path_length) / $self->speeds->{$self->last_speed} * 60;
+ my $path_time = $path_length / $self->speeds->{$self->last_speed} * 60;
if ($self->layer->id == 0) {
$path_time = $Slic3r::Config->first_layer_speed =~ /^(\d+(?:\.\d+)?)%$/
? $path_time / ($1/100)
- : unscale($path_length) / $Slic3r::Config->first_layer_speed * 60;
+ : $path_length / $Slic3r::Config->first_layer_speed * 60;
}
$self->elapsed_time($self->elapsed_time + $path_time);
}
@@ -268,6 +277,7 @@ sub unretract {
my $gcode = "";
if ($self->lifted) {
+ $self->speed('travel');
$gcode .= $self->G0(undef, $self->z - $self->lifted, 0, 'restore layer Z');
$self->lifted(0);
}
@@ -312,10 +322,12 @@ sub _G0_G1 {
my ($gcode, $point, $z, $e, $comment) = @_;
my $dec = $self->dec;
+ my $speed_factor;
if ($point) {
$gcode .= sprintf " X%.${dec}f Y%.${dec}f",
($point->x * &Slic3r::SCALING_FACTOR) + $self->shift_x - $self->extruder->extruder_offset->[X],
($point->y * &Slic3r::SCALING_FACTOR) + $self->shift_y - $self->extruder->extruder_offset->[Y]; #**
+ $speed_factor = $self->_limit_frequency($point);
$self->last_pos($point->clone);
}
if (defined $z && (!defined $self->z || $z != $self->z)) {
@@ -323,7 +335,7 @@ sub _G0_G1 {
$gcode .= sprintf " Z%.${dec}f", $z;
}
- return $self->_Gx($gcode, $e, $comment);
+ return $self->_Gx($gcode, $e, $speed_factor, $comment);
}
sub G2_G3 {
@@ -343,39 +355,45 @@ sub G2_G3 {
($center->[Y] - $self->last_pos->[Y]) * &Slic3r::SCALING_FACTOR;
$self->last_pos($point);
- return $self->_Gx($gcode, $e, $comment);
+ return $self->_Gx($gcode, $e, undef, $comment);
}
sub _Gx {
my $self = shift;
- my ($gcode, $e, $comment) = @_;
+ my ($gcode, $e, $speed_factor, $comment) = @_;
my $dec = $self->dec;
- # determine speed
- my $speed = ($e ? $self->speed : 'travel');
-
# output speed if it's different from last one used
# (goal: reduce gcode size)
my $append_bridge_off = 0;
- if ($speed ne $self->last_speed) {
- if ($speed eq 'bridge') {
+ my $F;
+ if ($self->speed ne $self->last_speed) {
+ if ($self->speed eq 'bridge') {
$gcode = ";_BRIDGE_FAN_START\n$gcode";
} elsif ($self->last_speed eq 'bridge') {
$append_bridge_off = 1;
}
# apply the speed reduction for print moves on bottom layer
- my $speed_f = $speed eq 'retract'
+ $F = $self->speed eq 'retract'
? ($self->extruder->retract_speed_mm_min)
- : $self->speeds->{$speed};
+ : $self->speeds->{$self->speed} // $self->speed;
if ($e && $self->layer && $self->layer->id == 0 && $comment !~ /retract/) {
- $speed_f = $Slic3r::Config->first_layer_speed =~ /^(\d+(?:\.\d+)?)%$/
- ? ($speed_f * $1/100)
+ $F = $Slic3r::Config->first_layer_speed =~ /^(\d+(?:\.\d+)?)%$/
+ ? ($F * $1/100)
: $Slic3r::Config->first_layer_speed * 60;
}
- $gcode .= sprintf " F%.${dec}f", $speed_f;
- $self->last_speed($speed);
+ $self->last_speed($self->speed);
+ $self->last_f($F);
+ $F *= $speed_factor // 1;
+ } elsif (defined $speed_factor && $speed_factor != 1) {
+ $gcode .= sprintf " F%.${dec}f", ($self->last_f * $speed_factor);
+ $self->force_f(1); # next move will need explicit F
+ } elsif ($self->force_f) {
+ $gcode .= sprintf " F%.${dec}f", $self->last_f;
+ $self->force_f(0);
}
+ $gcode .= sprintf " F%.${dec}f", $F if defined $F;
# output extrusion distance
if ($e && $Slic3r::Config->extrusion_axis) {
@@ -472,4 +490,40 @@ sub set_bed_temperature {
return $gcode;
}
+# http://hydraraptor.blogspot.it/2010/12/frequency-limit.html
+# the following implementation is inspired by Marlin code
+sub _limit_frequency {
+ my $self = shift;
+ my ($point) = @_;
+
+ return if $Slic3r::Config->vibration_limit == 0;
+ my $min_time = 1 / ($Slic3r::Config->vibration_limit * 60);
+
+ # calculate the move vector and move direction
+ my @move = map unscale $_, @{ Slic3r::Line->new($self->last_pos, $point)->vector->[B] };
+ my @dir = map { $move[$_] ? (($move[$_] > 0) ? 1 : -1) : 0 } X,Y;
+
+ my $factor = 1;
+ my $segment_time = abs(max(@move)) / $self->speeds->{$self->speed};
+ if ($segment_time > 0) {
+ my @max_segment_time = ();
+ foreach my $axis (X,Y) {
+ if ($self->last_dir->[$axis] == $dir[$axis]) {
+ $self->segment_time->[$axis][0] += $segment_time;
+ } else {
+ @{ $self->segment_time->[$axis] } = ($segment_time, @{ $self->segment_time->[$axis] }[0,1]);
+ }
+ $max_segment_time[$axis] = max($self->segment_time->[$axis][0], max($self->segment_time->[$axis][1], $self->segment_time->[$axis][2]));
+ $self->last_dir->[$axis] = $dir[$axis] if $dir[$axis];
+ }
+
+ my $min_segment_time = min(@max_segment_time);
+ if ($min_segment_time < $min_time) {
+ $factor = $min_segment_time / $min_time;
+ }
+ }
+
+ return $factor;
+}
+
1;
diff --git a/lib/Slic3r/GUI/Tab.pm b/lib/Slic3r/GUI/Tab.pm
index e1469053c..b9c445c59 100644
--- a/lib/Slic3r/GUI/Tab.pm
+++ b/lib/Slic3r/GUI/Tab.pm
@@ -634,6 +634,10 @@ sub build {
},
],
},
+ {
+ title => 'Advanced',
+ options => [qw(vibration_limit)],
+ },
]);
$self->add_options_page('Custom G-code', 'cog.png', optgroups => [
diff --git a/lib/Slic3r/Line.pm b/lib/Slic3r/Line.pm
index 58c9479d3..d0d0a3da7 100644
--- a/lib/Slic3r/Line.pm
+++ b/lib/Slic3r/Line.pm
@@ -32,6 +32,11 @@ sub length {
return Slic3r::Geometry::line_length($self);
}
+sub vector {
+ my $self = shift;
+ return (ref $self)->new([0,0], [map $self->[B][$_] - $self->[A][$_], X,Y]);
+}
+
sub atan {
my $self = shift;
return Slic3r::Geometry::line_atan($self);
diff --git a/slic3r.pl b/slic3r.pl
index d540fcae4..6e011ec88 100755
--- a/slic3r.pl
+++ b/slic3r.pl
@@ -311,6 +311,7 @@ $j
--support-material-extrusion-width
Set a different extrusion width for support material
--bridge-flow-ratio Multiplier for extrusion when bridging (> 0, default: $config->{bridge_flow_ratio})
+ --vibration-limit Experimental frequency limit to avoid resonance (Hz, default: $config->{vibration_limit})
Multiple extruder options:
--extruder-offset Offset of each extruder, if firmware doesn't handle the displacement