From 72b99bf1ba24cb9124668b958039b32a164c68cd Mon Sep 17 00:00:00 2001
From: InsanityAutomation
 <38436470+InsanityAutomation@users.noreply.github.com>
Date: Sat, 9 Oct 2021 19:13:19 -0400
Subject: [PATCH] =?UTF-8?q?=F0=9F=90=9B=20Fix=20IDEX=20Duplication=20Mode?=
 =?UTF-8?q?=20Positioning=20(#22914)?=
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Fixing #22538
---
 Marlin/src/module/motion.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Marlin/src/module/motion.cpp b/Marlin/src/module/motion.cpp
index a56831c214..c820ce3599 100644
--- a/Marlin/src/module/motion.cpp
+++ b/Marlin/src/module/motion.cpp
@@ -1194,6 +1194,7 @@ FORCE_INLINE void segment_idle(millis_t &next_idle_ms) {
         case DXC_DUPLICATION_MODE:
           if (active_extruder == 0) {
             // Restore planner to parked head (T1) X position
+            float x0_pos = current_position.x;
             xyze_pos_t pos_now = current_position;
             pos_now.x = inactive_extruder_x;
             planner.set_position_mm(pos_now);
@@ -1201,7 +1202,9 @@ FORCE_INLINE void segment_idle(millis_t &next_idle_ms) {
             // Keep the same X or add the duplication X offset
             xyze_pos_t new_pos = pos_now;
             if (dual_x_carriage_mode == DXC_DUPLICATION_MODE)
-              new_pos.x += duplicate_extruder_x_offset;
+              new_pos.x = x0_pos + duplicate_extruder_x_offset;
+            else
+              new_pos.x = _MIN(X_BED_SIZE - x0_pos, X_MAX_POS);
 
             // Move duplicate extruder into the correct position
             if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPGM("Set planner X", inactive_extruder_x, " ... Line to X", new_pos.x);