Option for klipper only: Adjustment of "accel_to_decel" (#220)

* Klipper option: Adjustment of "accel_to_decel"

Add option to automatically adjust accel_to_decel to 50% of chosen acceleration.

* allow variable accel_to_decel percentage

allow variable accel_to_decel percentage for klipper firmware

src/libslic3r/GCodeWriter.cpp

@@ -174,10 +174,15 @@ std::string GCodeWriter::set_acceleration(unsigned int acceleration)
         // This is new MarlinFirmware with separated print/retraction/travel acceleration.
         // Use M204 P, we don't want to override travel acc by M204 S (which is deprecated anyway).
         gcode << "M204 P" << acceleration;
-    } else {
-        // M204: Set default acceleration
+    } else if (FLAVOR_IS(gcfKlipper) && this->config.accel_to_decel_enable) {
+        gcode << "SET_VELOCITY_LIMIT ACCEL_TO_DECEL=" << acceleration * this->config.accel_to_decel_factor / 100;
+        if (GCodeWriter::full_gcode_comment)
+            gcode << " ; adjust max_accel_to_decel to chosen % of new accel value\n";
         gcode << "M204 S" << acceleration;
-    }
+        // Set max accel to decel to half of acceleration
+    } else
+        gcode << "M204 S" << acceleration;
+    
     //BBS
     if (GCodeWriter::full_gcode_comment) gcode << " ; adjust acceleration";
     gcode << "\n";

src/libslic3r/Preset.cpp

@@ -752,7 +752,7 @@ static std::vector<std::string> s_Preset_print_options {
      "small_perimeter_speed", "small_perimeter_threshold","bridge_angle", "filter_out_gap_fill", "post_process", "travel_acceleration","inner_wall_acceleration",
      "default_jerk", "outer_wall_jerk", "inner_wall_jerk", "infill_jerk", "top_surface_jerk", "initial_layer_jerk","travel_jerk",
      "top_solid_infill_flow_ratio","bottom_solid_infill_flow_ratio","only_one_wall_first_layer",
-     "print_flow_ratio","seam_gap","role_based_wipe_speed","wipe_speed"
+     "print_flow_ratio","seam_gap","role_based_wipe_speed","wipe_speed","accel_to_decel_enable", "accel_to_decel_factor"
 
 };
 

src/libslic3r/Print.cpp

@@ -103,7 +103,6 @@ bool Print::invalidate_state_by_config_options(const ConfigOptionResolver & /* n
         "outer_wall_acceleration",
         "inner_wall_acceleration",
         "initial_layer_acceleration",
-        "outer_wall_acceleration",
         "top_surface_acceleration",
         "travel_acceleration",
         // BBS
@@ -153,7 +152,9 @@ bool Print::invalidate_state_by_config_options(const ConfigOptionResolver & /* n
         "seam_gap",
         "role_based_wipe_speed",
         "wipe_speed",
-        "use_relative_e_distances"
+        "use_relative_e_distances",
+        "accel_to_decel_enable",
+        "accel_to_decel_factor"
     };
 
     static std::unordered_set<std::string> steps_ignore;

src/libslic3r/PrintConfig.cpp

@@ -1168,7 +1168,7 @@ void PrintConfigDef::init_fff_params()
 
     def = this->add("pressure_advance", coFloats);
     def->label = L("Pressure advance");
-    def->tooltip = L("Pressure advnce(Klipper) AKA Linear advance factor(Marlin)");
+    def->tooltip = L("Pressure advance(Klipper) AKA Linear advance factor(Marlin)");
     def->max = 2;
     def->mode = comAdvanced;
     def->set_default_value(new ConfigOptionFloats { 0.02 });
@@ -1452,6 +1452,21 @@ void PrintConfigDef::init_fff_params()
     def->mode = comAdvanced;
     def->set_default_value(new ConfigOptionFloat(300));
 
+    def = this->add("accel_to_decel_enable", coBool);
+    def->label = L("Adjust accel to decel");
+    def->tooltip = L("Klipper's max_accel_to_decel will be adjusted automatically");
+    def->mode = comAdvanced;
+    def->set_default_value(new ConfigOptionBool(false));
+    
+    def = this->add("accel_to_decel_factor", coPercent);
+    def->label = L("% of acceleration");
+    def->tooltip = L("Klipper's Max_accel_to_decel will be adjusted to this % of acceleration");
+    def->sidetext = L("%");
+    def->min = 1;
+    def->max = 100;
+    def->mode = comAdvanced;
+    def->set_default_value(new ConfigOptionPercent(50));
+    
     def = this->add("default_jerk", coFloat);
     def->label = L("Default");
     def->tooltip = L("Default");

src/libslic3r/PrintConfig.hpp

@@ -854,6 +854,8 @@ PRINT_CONFIG_CLASS_DEFINE(
     // SoftFever
     ((ConfigOptionBool,                use_firmware_retraction))
     ((ConfigOptionBool,                use_relative_e_distances))
+    ((ConfigOptionBool,                accel_to_decel_enable))
+    ((ConfigOptionPercent,             accel_to_decel_factor))
 )
 
 // This object is mapped to Perl as Slic3r::Config::Print.