From 37013aa25b33d78317577c924b75527599df7553 Mon Sep 17 00:00:00 2001
From: "zhimin.zeng" <zhimin.zeng@bambulab.com>
Date: Fri, 14 Feb 2025 18:28:41 +0800
Subject: [PATCH] FIX: modify quick extrude to 1 perimeter width

jira: none
Change-Id: Ibda111742af2d664088a51e9dd3740f81b4649c7
(cherry picked from commit 9fccb9bcde5332bafcb50f5fbb77212caac19131)
---
 src/libslic3r/GCode/WipeTower.cpp | 4 ++--
 src/libslic3r/GCode/WipeTower.hpp | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/libslic3r/GCode/WipeTower.cpp b/src/libslic3r/GCode/WipeTower.cpp
index aaf9e01936..df9429c386 100644
--- a/src/libslic3r/GCode/WipeTower.cpp
+++ b/src/libslic3r/GCode/WipeTower.cpp
@@ -1477,7 +1477,7 @@ void WipeTower::set_extruder(size_t idx, const PrintConfig& config)
         m_filpar[idx].max_e_speed = (max_vol_speed / filament_area());
 
     m_perimeter_width = nozzle_diameter * Width_To_Nozzle_Ratio; // all extruders are now assumed to have the same diameter
-    m_nozzle_change_perimeter_width = 2 * m_perimeter_width;
+    m_nozzle_change_perimeter_width = m_perimeter_width;
     // BBS: remove useless config
 #if 0
     if (m_semm) {
@@ -2810,7 +2810,7 @@ WipeTower::NozzleChangeResult WipeTower::nozzle_change_new(int old_filament_id,
         if (i == nozzle_change_line_count - 1)
             break;
         if (writer.y() + dy - float(EPSILON) > cleaning_box.ru.y() - m_nozzle_change_perimeter_width) break;
-        writer.travel(writer.x(), writer.y() + dy, nozzle_change_speed);
+        writer.extrude(writer.x(), writer.y() + dy, nozzle_change_speed);
         m_left_to_right = !m_left_to_right;
     }
 
diff --git a/src/libslic3r/GCode/WipeTower.hpp b/src/libslic3r/GCode/WipeTower.hpp
index 19df119ed1..0405708cca 100644
--- a/src/libslic3r/GCode/WipeTower.hpp
+++ b/src/libslic3r/GCode/WipeTower.hpp
@@ -458,7 +458,7 @@ private:
     Vec2f m_bed_bottom_left; // bottom-left corner coordinates (for rectangular beds)
 
 	float m_perimeter_width = 0.4f * Width_To_Nozzle_Ratio; // Width of an extrusion line, also a perimeter spacing for 100% infill.
-    float m_nozzle_change_perimeter_width = 2 * 0.4f * Width_To_Nozzle_Ratio;
+    float m_nozzle_change_perimeter_width = 0.4f * Width_To_Nozzle_Ratio;
 	float m_extrusion_flow = 0.038f; //0.029f;// Extrusion flow is derived from m_perimeter_width, layer height and filament diameter.
 
 	// Extruder specific parameters.