From 36fcf173580956ad7912e784e57f3ee06ab4768d Mon Sep 17 00:00:00 2001
From: Kiss Lorand <50251547+kisslorand@users.noreply.github.com>
Date: Thu, 20 Nov 2025 16:11:12 +0200
Subject: [PATCH] Reduce artifacts from short travel moves before external
 perimeters (#10722)

Accel to extloop

Co-authored-by: SoftFever <softfeverever@gmail.com>
---
 src/libslic3r/GCode.cpp | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/src/libslic3r/GCode.cpp b/src/libslic3r/GCode.cpp
index 58281f7ef7..a5af72f4c9 100644
--- a/src/libslic3r/GCode.cpp
+++ b/src/libslic3r/GCode.cpp
@@ -6851,21 +6851,37 @@ std::string GCode::travel_to(const Point& point, ExtrusionRole role, std::string
     // Orca: we don't need to optimize the Klipper as only set once
     double jerk_to_set = 0.0;
     unsigned int acceleration_to_set = 0;
+    
     if (this->on_first_layer()) {
         if (m_config.default_acceleration.value > 0 && m_config.initial_layer_acceleration.value > 0) {
             acceleration_to_set = (unsigned int) floor(m_config.initial_layer_acceleration.value + 0.5);
         }
+        
         if (m_config.default_jerk.value > 0 && m_config.initial_layer_jerk.value > 0) {
             jerk_to_set = m_config.initial_layer_jerk.value;
         }
     } else {
-        if (m_config.default_acceleration.value > 0 && m_config.travel_acceleration.value > 0) {
-            acceleration_to_set = (unsigned int) floor(m_config.travel_acceleration.value + 0.5);
+        if (m_config.default_acceleration.value > 0) {
+            if (role == erExternalPerimeter && travel.length() < scale_(EXTRUDER_CONFIG(retraction_minimum_travel))) {
+                if (m_config.outer_wall_acceleration.value > 0)
+                    acceleration_to_set = (unsigned int) floor(m_config.outer_wall_acceleration.value + 0.5);
+            } else {
+                if (m_config.travel_acceleration.value > 0)
+                    acceleration_to_set = (unsigned int) floor(m_config.travel_acceleration.value + 0.5);
+            }
         }
-        if (m_config.default_jerk.value > 0 && m_config.travel_jerk.value > 0) {
-            jerk_to_set = m_config.travel_jerk.value;
+
+        if (m_config.default_jerk.value > 0) {
+            if (role == erExternalPerimeter && travel.length() < scale_(EXTRUDER_CONFIG(retraction_minimum_travel))) {
+                if (m_config.outer_wall_jerk.value > 0)
+                    jerk_to_set = m_config.outer_wall_jerk.value;
+            } else {
+                if (m_config.travel_jerk.value > 0)
+                    jerk_to_set = m_config.travel_jerk.value;
+            }
         }
     }
+    
     if (m_writer.get_gcode_flavor() == gcfKlipper) {
         gcode += m_writer.set_accel_and_jerk(acceleration_to_set, jerk_to_set);
     } else {