From 425af4240b222448ab2ebe5c5d152adeed2079a4 Mon Sep 17 00:00:00 2001
From: studiodyne <42887851+studiodyne@users.noreply.github.com>
Date: Wed, 6 Dec 2023 06:05:48 +0100
Subject: [PATCH] =?UTF-8?q?=F0=9F=90=9B=20Fix=20tool-change=20E=20prime=20?=
 =?UTF-8?q?(#26494)?=
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Followup to #17248
---
 Marlin/src/module/tool_change.cpp | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/Marlin/src/module/tool_change.cpp b/Marlin/src/module/tool_change.cpp
index 22982fa91a..373dcf3142 100644
--- a/Marlin/src/module/tool_change.cpp
+++ b/Marlin/src/module/tool_change.cpp
@@ -1028,7 +1028,7 @@ void fast_line_to_current(const AxisEnum fr_axis) { _line_to_current(fr_axis, 0.
     if (!too_cold(active_extruder)) {
       destination = current_position; // Remember the old position
 
-      const bool ok = TERN1(TOOLCHANGE_PARK, all_axes_homed() && toolchange_settings.enable_park);
+      const bool ok = TERN0(TOOLCHANGE_PARK, all_axes_homed() && toolchange_settings.enable_park);
 
       #if HAS_FAN && TOOLCHANGE_FS_FAN >= 0
         // Store and stop fan. Restored on any exit.
@@ -1080,7 +1080,20 @@ void fast_line_to_current(const AxisEnum fr_axis) { _line_to_current(fr_axis, 0.
         }
       #endif
 
+      // Clone previous position
       extruder_cutting_recover(destination.e); // Cutting recover
+
+      // Retract if previously retracted
+      #if ENABLED(FWRETRACT)
+        if (fwretract.retracted[active_extruder])
+          unscaled_e_move(-fwretract.settings.retract_length, fwretract.settings.retract_feedrate_mm_s);
+      #endif
+
+      // If resume_position is negative
+      if (current_position.e < 0) unscaled_e_move(current_position.e, MMM_TO_MMS(toolchange_settings.retract_speed));
+
+      planner.synchronize();
+      planner.set_e_position_mm(current_position.e); // Extruder primed and ready
     }
   }
 
@@ -1597,6 +1610,9 @@ void tool_change(const uint8_t new_tool, bool no_move/*=false*/) {
         unscaled_e_move(-fwretract.settings.retract_length, fwretract.settings.retract_feedrate_mm_s);
     #endif
 
+    // If resume_position is negative
+    if (resume_current_e < 0) unscaled_e_move(resume_current_e, MMM_TO_MMS(toolchange_settings.retract_speed));
+
     // If no available extruder
     if (EXTRUDERS < 2 || active_extruder >= EXTRUDERS - 2 || active_extruder == migration.last)
       migration.automode = false;