Fix autospeed: max print speed %

supermerill/SuperSlicer#3110

2 files changed, 3 insertions, 2 deletions

diff --git a/src/libslic3r/GCode.cpp b/src/libslic3r/GCode.cpp
index a06b8991b..247d1e3b7 100644
--- a/src/libslic3r/GCode.cpp
+++ b/src/libslic3r/GCode.cpp
@@ -1056,7 +1056,8 @@ namespace DoExport {
 	        // volumetric speed as the volumetric speed produced by printing the 
 	        // smallest cross-section at the maximum speed: any larger cross-section
 	        // will need slower feedrates.
-	        volumetric_speed = *std::min_element(mm3_per_mm.begin(), mm3_per_mm.end()) * print.config().max_print_speed.value;
+            double max_print_speed = print.config().get_computed_value("max_print_speed");
+            volumetric_speed = *std::min_element(mm3_per_mm.begin(), mm3_per_mm.end()) * max_print_speed;
 	        // limit such volumetric speed with max_volumetric_speed if set
 	        if (print.config().max_volumetric_speed.value > 0)
 	            volumetric_speed = std::min(volumetric_speed, print.config().max_volumetric_speed.value);
diff --git a/src/libslic3r/PrintConfig.cpp b/src/libslic3r/PrintConfig.cpp
index dd2be2f8e..33f57d4ec 100644
--- a/src/libslic3r/PrintConfig.cpp
+++ b/src/libslic3r/PrintConfig.cpp
@@ -3414,7 +3414,7 @@ void PrintConfigDef::init_fff_params()
         "to set the highest print speed you want to allow."
         "\nThis can be expressed as a percentage (for example: 100%) over the machine Max Feedrate for X axis.");
     def->sidetext = L("mm/s or %");
-    def->ratio_over = "machine_max_acceleration_x";
+    def->ratio_over = "machine_max_feedrate_x";
     def->min = 1;
     def->mode = comExpert | comPrusa;
     def->set_default_value(new ConfigOptionFloatOrPercent(80, false));